This video reduces my confusion of quantum physic by 20%

@steak37

4 жыл бұрын

mine was raised by 20% :)

@adamreed6271

4 жыл бұрын

Watch it five times 😎😎

@jkchandravanshi

3 жыл бұрын

Too good % reduction considering the video time of only 13 minutes.

@lads.7715

3 жыл бұрын

Your confusion could have been reduced anywhere between 0-100%, but you had to go ahead and measure it.

@tloggen

3 жыл бұрын

Currently my state of confusion is still in superposition.

Schrodinger arrives at the vets to pick up his cat. The vet says, "Well, Mr. Schrodinger, I've got some good news and some bad news..."

@baldevsinghjadon1601

2 жыл бұрын

Well,they both are just news until the vet says the 1st news to schördinger.

@billkelly8222

2 жыл бұрын

Mr. Schrodinger -> Dr. Schrödinger

@Boobeinstein

Жыл бұрын

The good news is that your cat is alive. The bad news is that your cat is dead.

@thejils1669

Жыл бұрын

@sim sim salabim actually, the conversation could, or will, or would (your choice depending on your quantum state) go like this: "Dr. Schrodinger, I potentially have some bad news or I potentially have some good news: your cat could possibly be dead or you cat could possibly be alive."

@ts8960

Жыл бұрын

@thejils1669 no, the thought experiment was meant to show how absurd the Copenhagen interpretation is by telling you the cat is at a state of being both dead and alive UNTIL you open the box, not potentially.

I can't say I understand everything, but I'm still binge watching

@baimonawahab6449

3 жыл бұрын

perhaps its already colapsed because of the spliter...and because of the spliter it blocked other photon and because of the spliter othe photons blockes.only those photon entered the spliter reached the screen.

One of my first questions upon studying Quantum Physics was this, "What exactly do they mean by "observe"? This video does a wonderful job of answering that question! Thanks!

@amitaimedan

4 жыл бұрын

But how do you detect a photon?

@jonnull

4 жыл бұрын

I was wondering exactly the same. The truth doesn't inspire an DMT-fueled all-nighter discussion the same way as if consciousness was involved, does it. 😄 #mildlydisappointedtho

@ohtheblah

4 жыл бұрын

@@amitaimedan with a photon detector obviously

@btradingwarehouse3861

4 жыл бұрын

...sorry to disappoint you Mr. Sandlund-this video is not only far away to "answer" your Q but presented attempt is very simplified and incorrect... ...but hey if you get it good for you... ...all the best...

@dzikraaksa527

3 жыл бұрын

8:52 this is where he make a mistake. interaction between particle didnt make wave function collapse. it will make both particle become entangled. we can measure again with another particle but it also will entangled with previous particle. no one could prove that if we shot a particle with particle, make them interact, will make wave function collapse if there is no presence of observer (concious mind). How you can tell that wave function is collapse if you are not there interpreting the measurement result? this is the real measurement problem. and this is also the root of "consciousness collapsing wave function" theory. this explanation in the video didnt explain much. it will only make people think that consciousness is not necessary for collapsing the wave function. in which not true. there is a scientific experiment that prove that consciousness actually effect reality what arvin ash point out in this video (also almost all of his video) is to bring the personal agenda, that was The Materialism.

It was all fun and games until Schördinger's cat started living and dying, and living and dying at the same time.

@ArvinAsh

4 жыл бұрын

I didn't get into that, but the cat was used by Schrodinger to show the absurdity of the interpretation of his own wave equation. That is not the way QM would actually work for a cat.

@jilliansmith7123

4 жыл бұрын

Arvin Ash: thank you. I've thought that same thing--NOT the way it would work for a cat, but so often people get angry when I mention that.

@ArvinAsh

4 жыл бұрын

@@jilliansmith7123 There's a famous saying by Mark Twain, "Never argue with a fool, onlookers may not be able to tell who the fool is."

@Juttutin

4 жыл бұрын

@@ArvinAsh "That is not the way QM would actually work for a cat." Except that IS the way QM seems to work for a human consciously not observing a cat. Yes, Schrödinger was absolutely pointing to the absurdity of the logical consequence of his equation under the Copenhagen interpretation. Again, please avoid presenting these beliefs as though they are fact. We just don't know, and the darn problem is so immune to investigation. And again, I hold the same belief as you. Maybe the truth of the cat not actually being both alive and dead lies on some Gödelian true-but-unprovable island. I hope not.

@ArvinAsh

4 жыл бұрын

@@Juttutin Not sure what your argument is. I am not stating a belief. The cat as described by Schrodinger is NOT in superposition like subatomic particles are theorized to be. The cat is alive OR dead, not alive AND dead.

Like the way you made it clear on the difference between Observation and Measurement.

@mccullum2593

4 жыл бұрын

It was interesting considering they've been hundreds of experiments showing that a measurement buy a computer does not collapse the function or change it but a conscious observation does the best analogy for why that's not discussed is when they ask scientist to look at their results they say ( I don't want to)

@biggsydaboss3410

4 жыл бұрын

@@mccullum2593 I've not heard of one. It's mere interaction with certain macro phenomena that causes the wave function ro collapse. It's why quantum computing is so difficult. Inagin trying to isolate qbits from all outside interference.

@Acsion42

4 жыл бұрын

Biggsy DaBoss, you haven’t heard of one because that fact invalidates materialism, and scientists that rely on publishing papers can’t risk running afoul of materialist dogma or else lose their funding. Consider doing your own research rather than taking the word of someone with a vested interest at face value. As a thought experiment, try to find an example of an experiment where they still measured without looking at the data and found that the wave function did collapse.

@jorgepeterbarton

4 жыл бұрын

@@mccullum2593 where?

@jorgepeterbarton

4 жыл бұрын

@@Acsion42 as a thought experiment, post these supposed experiments that show consciousness being involed in QM observation is anything more than taking the wrong definition of the word

Mr Ash is the physics teacher I wish I had. To explain something so complex in such a simple and understandable way is truly an art.

@ArvinAsh

4 жыл бұрын

Thanks my friend. I really appreciate it.

@domari9459

Жыл бұрын

Indeed! It is an art.

@inlumina_punctro

Жыл бұрын

@@ArvinAsh kzread.info/dash/bejne/rK1qz7h6kpC7mrg.html Hard to deal with it, isnt it ? 😃

@MaloPiloto

Жыл бұрын

Well said, Thomas! And really well done on an extremely strange, complex subject, Arvin. Thanks!

Finally, an answer to the age-old question: If a particle interacts in a forest, but nobody's around to observe it, does its probability field collapse?

@ArvinAsh

4 жыл бұрын

Haha. I made a dedicated video on that age old question. Check it out.

@danamorrell7972

3 жыл бұрын

@@Takeitinnblood Great point, and one that I think this video did a poor job (in fact no job at all) of covering. Nevertheless, I appreciate the knowledge you share, Arvin.

@geraldford6409

3 жыл бұрын

Only if a bear pooped on it

@voidisyinyangvoidisyinyang885

3 жыл бұрын

Read "Life on the Edge" 2016 by JohnJoe McFadden - award winning science book on quantum biology

@devi3932

3 жыл бұрын

@@ArvinAsh why a photon or an electron's wave function doesn't collide when it is shot from the instrument to the screen through the slit? by the definition of measurement in quantum world it was measured when it was in the atom, when it was shot, and all the time sub atomic particles were measuring it.🙄

I wish this guy was one of my teachers in high school. Hell I wish I could just sit down and ask him questions and have conversations about this stuff, I think about it all day

@GJ-dj4jx

4 жыл бұрын

Do your self a favour and don't take everything this guy says as truth. He doesn't understand quantum mechanics.

@desperado3236

4 жыл бұрын

I rather take his word then some random in the comment section. Its not even his theories. Its just him interpreting and explaining other peoples theories. Which you would understand if you werent trying to drag him through the mud. At least have a damn argument. Arvin does a fantastic job explaining these theories. Whether hes right or wrong is not even the point. Hell, i disagree with him all the time on things yet that doesnt make him wrong or bad. He's still a great source of info and explanation.

@GJ-dj4jx

4 жыл бұрын

@@desperado3236 I think he's good too, just not quantum physics though. There is no explanation for the cause of the collapse that takes away consciesness from the equation. Whomever comes out with one would get the Nobel price.

@ahitler5592

4 жыл бұрын

@@GJ-dj4jx quantum physicists are drug addicts like you. How the hell you would know if you don't look at it

@philip3257

3 жыл бұрын

Your optics diagram grossly wrong Square pyramid, refraction etc philipbradfield2@gmail.com

I have been investigating these topics for many years and have NEVER heard a more clear and concise clarification of these fundamental questions! Nicely done.

@EminorReal

3 жыл бұрын

I've been recommending searching for double slit delayed choice quantum eraser. The vid is great and concise but it is missing a part of the experiment which is worth looking into

@vedantsridhar8378

3 жыл бұрын

@@EminorReal kzread.info/dash/bejne/Yqmdm9GvorTbe6g.html Here's the video

Best part: the articulation of measurement VS observation. Great work! 👏 👏 👏

@johnculvyhouse9661

2 жыл бұрын

Hardly. The measurement problem has not been explained as even this KZreadr says. Just because Consciousness isn't required which is a claim not a fact doesn't mean Consciousness doesn't collapse wave functions.

The observation always confused me because how can an electron know when I’m looking but you helped clarify this

@EminorReal

3 жыл бұрын

Though the vid being very informative and helpful, it is missing a look into double slit delayed choice quantum eraser, which in my opinion is worth checking out

"I regard consciousness as fundamental. I regard matter as derivative from consciousness. We cannot get behind consciousness. Everything that we talk about, everything that we regard as existing, postulates consciousness." - Max Planck "Consciousness cannot be accounted for in physical terms. For consciousness is absolutely fundamental. It cannot be accounted for in terms of anything else." - Erwin Schrödinger

@subscriberswithnovideos-xw9xc

4 жыл бұрын

Both of them have got a lot of things wrong. Same with this. Consciousness is nothing special. Measurement is not made by a conscious observer. It is just an interaction between a measuring device or a photon interacting with the system. Enough with the bullshit pseudoscience.

@Jopie65

4 жыл бұрын

Smart people can be wrong too you know.

@clawfinger

4 жыл бұрын

@@Jopie65 True. But I think it speaks to the fact that scientists themselves are divided unlike the black and white picture portrayed in this video.

@Jopie65

4 жыл бұрын

@@clawfinger Maybe they used to, but when quantum mechanics became an established theory, there were not many scientists who concluded that quantum mechanics is an effect of consciousness. Nowadays, the argument most people have for that boils down to 'quantum mechanics is mysterious, consciousness is mysterious, so the two are probably linked somehow'.

@ryanswanson126

4 жыл бұрын

@spaghetti yummy Sometimes I eat so much that I feel like I'm spread out everywhere.

Thank you so much.. word "observation"always made me think that its some kind of magic and it can not be real physics..but it all makes complete sense when we use correct term "measurement"

@MrRaizada

4 жыл бұрын

An even better word would perhaps be "interaction". Collapse of "wave of probability" is caused by interaction with another system. Like photon hitting a slit.

@transcent7

4 жыл бұрын

I like how tyson descriped it, he said something that meant quantum world is so small that taking information out of it is already too much.

@MushVPeets

4 жыл бұрын

Measurement implies fancy instruments and conscious intent. I'd agree that "interaction" - even if inaccurate - is a better way to distill this concept.

@andylee4245

3 жыл бұрын

Green Kizuen Wow that’s a really good way of putting it

@jonathanwilson7957

3 жыл бұрын

@@MrRaizada Yes but the slit does not collapse the wave function, yet the photon clearly interacts with it. How can one interaction collapse the wave function, but the other does not? Interaction doesn't seem to be the right term here.

I just today found your channel and have been sucked in to your elegant way of making confusing subjects understandable. Although I felt like I understood most of the subjects, your explanation furthers my confidence in my understanding. Keep up the amazing work. We need more minds like yours teaching our children.

Amazing ! You actually explained the double split paradox with an explanation that makes sense. And excluding the conscious observer clears out A LOT of misunderstanding.

One of the best explanations of quantum mechanics I have observed.

@conanichigawa

4 жыл бұрын

Or measured?

Best explanation of the wave collapse and the definition of what is an observer. Can't tell you how many hours I spent to figure it out; if only you were around earlier... Ash. So glad to see that your sub numbers are up. I wait every week for your new video. Thank you so much.

@hrossaman

9 ай бұрын

The delayed-choice quantum eraser experiment completely contradicts the assertions in this video about what observation means. It is not physical interaction. The electrons in this experiment travel along mirrors and prisms, and the paths that reveal logically the which-way path show particle behavior, and tha paths that do not reveal logically the which-way path show wave behavior, even backwards in time.

Thanks Arvin for taking the time to explain this. Much Appreciated. Jon

thankyou for clearing up "observation". i've always sensed that this was a vague definition, misleading, and would ask about a precise definition, but everyone seemed to not give satisfactory answers and didn't care. you're a great teacher.

@schmetterling4477

Жыл бұрын

Observation is irreversible energy transfer. Five words are enough. You don't need an entire video for this triviality. If nobody has been able to explain this to you, then you have always been talking to the wrong people. ;-)

It's astounding how much clearer this is for me now, I was beginning to think there may be some hurdles just to high. I am going over to another link to work on my writing and spelling...I'm feeling confident now.

Thank you Arvin At last a brilliant and precise description of a complex subject.

Best description of double slit I've heard. The graphics are great too. Really glad I watched, thank you Arvin Ash

You talk very relaxed, thats why its very easy to grasp the tiny bit information coming from you. Thanks man for sharing the knowledges

That was so enlightening! You dispelled the most common misconception that light behaves differently when it is observed. That was worth my precious time and it's no misconception that time is precious.

@OSFSCANNER

4 жыл бұрын

rwarren58 Unfortunately the delayed choice quantum eraser experiment was not discussed which shutters the notion that an observe or consciousness is not required to collapse the wave function.

@jorgepeterbarton

4 жыл бұрын

@@OSFSCANNER no it doesnt. How? Like, how in the slightest? It deals with whether which-way information is retained. Not the same thing.

@jjhhandk3974

4 жыл бұрын

@@jorgepeterbarton umm... yes, I'm afraid it does.

@rwarren58

4 жыл бұрын

@lasest2 I believed it until this video. It went right to the nature of reality and the concept that the universe is a living thing. The latter may or may not be true but at least one truth as been revealed.

Thanks for taking the time to research and dispel these misunderstandings. In my opinion, the reality of quantum mechanics is much more profound than any of the misconceptions make it out to be!

this is the best rundown of quantum mechanics i've ever seen! thank you Arvin

You know its a well delivered lesson when it makes perfect sense but you have no clue why!! Thank you

Very lucid decription of the Copenhagen interpretation. There are alternatives to that. "Many Worlds" and "Pilot Wave" offer different ideas on the wave function. Since this was so well done, I'd love to see your video on those. But understanding the Copenhagen interpretation is good enough for most people to begin to grasp the concepts behind QM and be able to move on to all the strange things that it implies. I've studied this for 25 years and it still is hard to grasp.

Keeping it sweet and simple. Amazing work!

Far and away the best science content I have ever watched. Well done sir.

This was an excellent video and superbly narrated. Really well done!!!!

Best video ever explaining the double slit experiment and it’s interpretation 👏🏻

I'm going to make a playlist of my favorite Arvin Ash videos.

@ArvinAsh

3 жыл бұрын

Please do. Thank you.

I’ve been watching your videos for quite a while. This video is exceptional. Many thanks Arvin for clearing up my understanding of observation with QM

I’ve watched a bunch of videos regarding quantum mechanics, I feel like this dude has explained it the best, especially the description of measurement vs observation made it much more clear to me

@ArvinAsh

4 жыл бұрын

Glad you found it helpful...dude.

Really Thankful to Arvin ! It literally reduced my confusion in Quantum Mechanics a bit . And , I think my confusion of Sir G I Taylor's experiment is solved . Btw , to me Arvin Ash is the best explainer in Science Ed .

The world needs more of this

Two things though Arvin : if you code the photons so you have “which way” information, you don’t get the interference pattern, and the delayed choice quantum eraser shows if you delete the “measurement” later, the measurement at the slits does NOT collapse the wave function. Indicating it IS the observer and not the measurement causing the collapse.

@ArvinAsh

2 жыл бұрын

Delayed choice experiment, as I understand it, does not take a measurement then erase it later. It merely measures the state of one entangled particle before the state of the other is determined. If you have a reference to experiments where they measured and then erased as you indicate, I would be interested in reading it.

Great job simplifying without oversimplifying.

Thanks, that really clears things up! Glad I watched this video.

Amazingly and clearly presented to lay people. You're an extremely good explainer.

Love your videos, Arvin! Keep 'em coming!

I think you have had explained the confusion between abservation and measurement very well but beyond well. Using measurement instead of abservation really Changed the entire conversation about the abserver.

I am confused about the fact that, how he generated a single photon?

@losmazeman

4 жыл бұрын

Same here.

@lalit5408

4 жыл бұрын

There are lots of ways now. I think at that time he did it by generation like 1000s and 1000s of protons and sending them inside a box where they bounce of the walls and get absorbed. But every few seconds a photon pass through a pin hole. Now you just need to turn off or block photons after first photon pass through. And you have single photon.

@georgeblau1072

4 жыл бұрын

@@lalit5408 So does this mean you are/were observing or measuring that very photon - which leaves the photon source - already once before it reaches the double slit and later on hit the screen? I doubt the way we were told how the experiment really works and what influences the behavior of those photons. Perhaps there are more effects to take into consideration than we imagine to understand the results/patterns on the screen.

@redneckrevolt1

4 жыл бұрын

George Blau I’m a curious mechanic and I’ve always wondered the engineering on a “single” photon or electron. I bet it’s just like a bundle of water molecules making a wave, it’s a bundle of photons and electrons that the experimentalists don’t care to mention due to funding blah blah blah.

@nagaambica7750

3 жыл бұрын

You can do it by decreasing intensity of light until it shows the intensity is minimum which marks a single photon.

That was really great and answered a lot of my questions about "observation" thank you!

@ankitaaarya

4 жыл бұрын

Agree

New to learning quantum things and am increasingly interested in learning the rest of this topic. Very good video. Subbed

Clearest explanation yet! I finally understand this basic problem.

Thanks so much for this video. Finally, this makes sense to me.

Thanks for explaining "observation". It was always hard to understand.

You are born to deliver this complicated content. So smooth. Ty!

What a clarifying explaination.. Mind-blowing and fantastic!!

Thank you. I finally get some common sense and clear explanation of this consciousness matter which didn’t really convince me.

Arvin, another precious one 👌

Arvin, thanks so much for doing these. Very interesting.

....wow...again!..... Spent countless hours trying to get my head around this stuff and BANG! you managed to explain this so well I think I now understand! Thankyou Arvin, thank you so much.

This produced a huge leap in my understanding. Thanks.

@darkfireeye

4 жыл бұрын

Well to the first one i would like to know that too. So basically any interaction of the photon would be a measurement and collapse it's wave? Maybe you can elaborate on that a bit. Thx

@allenrussell1947

4 жыл бұрын

@@darkfireeye Personally, my misunderstanding was "How can we know that 'observation changes the state without first knowing the state'". Now I see that they are two distinct things. IF I have this right, the particle does not actually exist except as a wave of probability until it interacts with something else.

Another fantastic video, thanks Arvin!

Your differentiation between the word ' Observation' & 'Measurement' is actually pathbreaking !

One of the best explained videos I've seen. Than you!

Finally someone explain observation to me.. Thank you 😃😃

I wished you were there when i was in school, 14 years ago, probably i could had become one those deep thinkers. Thank you for your passion. You have a permanent subscriber.

@ArvinAsh

4 жыл бұрын

Nice! Thanks my friend.

You did an excellent job explaining quantum in the ten minute time goal you set. Of course, there's a lot more to this subject matter, but you did a great job.

Arvin, You simply are “A GREAT TEACHER”.

Super informative, thank you.

I have a question about collapsing wave function. If a photon has been measured, is the fact that its wave function has been collapsed, stays as a property of this particular photon? And the photon carries this property with it? It's how I understood your example at 10:03 of the video. Does it mean that some photons have their wave functions collapsed, and others - not? And the photons "know" about their wave function state? Now the main question: does this mean that if a photon that came to use from the deep space has interacted with something during its journey through the space, and its wave function has been measured, it will stay measured forever, and if we manage to get a bunch of the photons measured this way, we will have the two lines in the test even though it wasn't us who measured it? Also, an additional question: what if we manage do measure all photons in the test with different detector, will it show two lines or many lines? I just though, what if all those photons with collapsed wave function that show two lines as particles, are actually united in a system because they have been measured by the same detector? And if it was different detectors, the photons would have been measured but still acted as a wave, because they are not a part of the same quantum-interacted family anymore?

@pszotter

4 жыл бұрын

No. There are no photons with collapsed wavefunctions flying around. That would be very weird! It is the problem with the Coppenhagen interpretation, which is a very old view, and considers this collapse to happen. No such collapse happens, it only seems that way from our perspective.

@ZoldenGames

4 жыл бұрын

@@pszotter Then it's strange that when photons in double slit experiment are being observed, they switch interference picture to "particle dispersion" one. How to explain this if there's no wave function collapse stored in photons?

@pszotter

4 жыл бұрын

It is called dehocerence. The propapilistic nature of the photon, electron, or other particle dissapears for thos objects (observers) that interact with it, meaning they get information about which slit it passes through. But the wavefunction does not collapse it is just expressed in terms of different bases. And you cannot treat the particle separately, you also have to consider the states of the observer. Either: |observer not knowing which slit observing interference pattern> and 1/root2|photon left> + 1/root2 * |photon right> two independent parts of the universal wavefunction Or: 1/root2 |observer seeing photon left> * |photon left> + 1/root2 * |observer seeing photon right> * |photon right> decoherence because observer received information about particle or photon, but can only observe one possibility at a time. The other possibility is also real, therefore no collapse.

@redneckrevolt1

4 жыл бұрын

pszotter how do we know we are sending one photon? I doubt we know enough about that

@pszotter

3 жыл бұрын

@@redneckrevolt1 Search for single photon light source. One atom getting excited then de-excited, one photon is emitted.

Excellent 👍will wait for next videos.thank you arvin

Today I learned what it really means by observation in physics. Thanks Arvin. Keep it up.

Great video. Also be ready for the Delayed-Choice-Quantum-Eraser-Experiment because people are going to say measurement is not necessary to collapses the wavefunction. but in this experiment is also Not necessary a Conscious Observer to collapse the wavefunction. What really collapses the wavefunction is the AVAILABILITY of the which-way path information and It doesn't matter if this which-way path information is stored in an atom and no one observes it. It still does Not require a Conscious Observer to collapse the wavefunction, just the availability of the which-way information recorded in some medium.

@pabloagustin8775

4 жыл бұрын

Exactly, some people still use this experiment as a proof for a Conscious Observer to collapse the wavefunction when this is not the case at all in the DCQE

@ArvinAsh

4 жыл бұрын

Yes, excellent summary! Thank you.

@Mercurius314

4 жыл бұрын

As I understand, in the DCQE-experiment, the choice to measure or not is made -after- the electron has already gone through the double slit. And depending on whether the choice was "measure" or "not-measure", the electron's wave function will turn out to have collapsed when it went through the slit (or not). Essentially, the making of the measurement determines, retroactively, that the wave function collapsed at the time it went through the double slit (or not). That seems consistent with the idea that a measurement is needed to collapse the wave function -- all it changes is that it is not required that the measurement to be made immediately. But if measurement "at that moment" is not a requirement, how can you determine whether a wave function can collapse without a conscious observer? It seems reasonable to me, btw, that a conscious observer should not be required to collapse a wave function. I'm simply wondering how that could be proven to a conscious being that this is the case. After all, whatever experiment you do, the wave function of the entire experiment as a whole (including whether or not the electron's wave function collapsed independently, etc) could only collapse when the conscious observer observes its results, and in that collapse writing its own history retroactively, including whether or not the electrons wave function collapsed and thus what the result of the experiment was. It seems to me as if the only way to say with certainty whether or not the wave function collapsed on measurement or on observation would be an experiment which is not observed, only measured, but the problem is that to determine the outcome of the experiment, someone has to observe it, at which point you can no longer be certain that it didn't collapse just now. Clearly I'm not understanding something yet, so my question probably does not make sense, and if it is dumb, please feel free to ignore it, but thanks for reading anyway ^_^

@donniseltzer7718

4 жыл бұрын

@@Mercurius314 DCQE-experiment still doesn't need a Conscious Observer. it only requires that the which-way-path-information is available and not destroyed to collapses the wavefunction. the which-way-path-information can be stored in some medium and it doesn't need the observation of a conscious being

I appreciate you making the distinction between observation and measurement; I feel that is often the stumbling block when discussing quantum mechanics, since observation implies a living conscious. Great explanations, thank you!

@ArvinAsh

4 жыл бұрын

Thanks. Yes, the word "observation" is very problematic.

Sir,the best thing you do is you post the lecture in words too,from which I make notes, very helpfull. We need teachers lecturers like you. Once again thank you sir. Soumyadeep Biswas from india.

@ArvinAsh

3 жыл бұрын

If you read the description under the videos posted on my website, you will usually see the full transcript of these videos.

@soumyadeepbiswas7816

3 жыл бұрын

@@ArvinAsh Yes sir, and I write it down to my dairy to make notes...

Excellent. I always had question of measurement. You cleared it really well and it’s easy to understanding.

@hrossaman

9 ай бұрын

The delayed-choice quantum eraser experiment completely contradicts the assertions in this video about what observation means. It is not physical interaction. The electrons in this experiment travel along mirrors and prisms, and the paths that reveal logically the which-way path show particle behavior, and tha paths that do not reveal logically the which-way path show wave behavior, even backwards in time.

Thanks Arvin. I am enjoying your exploration. Perhaps there is a different interpretation of the reason the double slit experiment changes. You mentioned that there doesn't need to be a conscious observer and it is really just measurement that collapses the potentiality wave. What if we remove the identification with ourselves, thinking we are a separate special bit of consciousness and see the fundamental nature of everything as the same consciousness. Then consciousness would be just interacting with itself in measurement or observation and collapsing the potentiality into a new expression of life/matter, consciousness in the form of life constantly blossoming itself. It doesn't need a special bit of identifiable consciousness called a human or even an animal to affect it. We as human expressions of consciousness just have the beautiful capacity to be aware of our awareness and thoughts, which gives us a sense of separate importance, and ultimately the doer somehow responsible for what we perceive. Perhaps we are fundamentally the same consciousness as is the fabric of the materially known and potential universe. This just takes it back to everything as potentiality until consciousness interacts and it collapses into matter and removes the illusory subject object causal definition.

Best explanation ever 💓💓

this video is awesome, it is like this was made to solve my main questions about this particular topic of quantum physics, I love it. Thank you.

Thank you. I finally (kinda) get it! The measurement explanation helped immensely!

I love your videos Arvin. My interest in science, space and topics that i never thought i could grasp have grown exponentially since following your channel. Cant wait till the next one

I’m always leery when humans talk about these things, I feel like it’s monkeys discussing how Chevy V8s are designed.

@CraigCsintalan

4 жыл бұрын

The understanding of physics is entirely based in mathematics. So it’s not say a field like biology (no shade) where there is more just knowing a fundamental process, everything is explained fundamentally with math.

@JavierArveloCruzSantana

4 жыл бұрын

@@CraigCsintalan biology, my friend, is physiology. Cut an animal into pieces and you can actually SEE the parts. Your point doesn't hold, or even compare. (No shade ... really.)

@JavierArveloCruzSantana

4 жыл бұрын

Why are you skeptical? If ALL math in the Standard Model were wrong, you wouldn't be watching KZread and replying to this video. How do we (humans) know how to do that, then?

@aleksandarignjatovic3130

4 жыл бұрын

"The understanding of physics is entirely based in mathematics." It is true and that is what is wrong with physics today. Too much mathematics and too little physics. That is why physics today is so speculative and should not be trusted.

@kotarojujo6365

4 жыл бұрын

Aleksandar Ignjatovic bruh . BRUH WTF.

Thank you so much. Your explanation about the meaning of the basic quantum equation has been the best ever heard.

Arvin Ash. I think this is one of the best videos you have put out Really helpful with the measurement problem. Dispelled for me a lot of the confusion over measurement and observations. Consciousness and non conscious Nice one !Thanks

One question on the difference between measurement and observation. After a measurement, how do you discern the result without an observer?

@ArvinAsh

4 жыл бұрын

When the which-way information is recorded by a mechanical or electronic device, it collapses the probability wave. It doesn't matter if anyone looks at the recording.

@vladanissimov6654

4 жыл бұрын

Arvin Ash But doesn’t this conclusion, which is based on mechanical recording, require a conscious agent at some stage of the experiment? Thus, where does the certainty come from that the wave collapse has happened before a conscious observer actually looked at or in some other way assessed the results of the recording?

@SimplifiedTruth

3 жыл бұрын

@@vladanissimov6654 exacly. It always takes a "knower" to obtain a result. Until then its an assumption.

@joaogabriellucas1865

3 жыл бұрын

@@SimplifiedTruth Yes. And why and how the heck the "measurement" collapses the wave function?

@SimplifiedTruth

3 жыл бұрын

@@joaogabriellucas1865 Its rendered data according to how we decide to measure it. It's just like in Sims until you look there is the potential and probability of what may be there when you look. Once you look then the data is sent and you see what was most probable to be there. One definite outcome. Before the measurement there existed only the probability wave function of what was possible to be there.

Excellent Arvin.. Much of the woo and general confusion might have originally been avoided if OTHER terminology had been adopted to describe the collapse of the wave function.. Maybe like, interaction instead of measurement or observation... The show was done with beautiful Simplicity as always Arvin.

@AlexTorres-qv3hv

4 жыл бұрын

If it were that easy to explain by using a magical word such as "interaction" then why would we need such complex interpretations like the Many Worlds or the De Broglie Bohm🤔????

@billnorris1264

4 жыл бұрын

@@AlexTorres-qv3hv Odd, nobody suggested it would make it EASY to explain, Just that much of the unsupported woo interpretations might have been sidestepped...

@billnorris1264

4 жыл бұрын

@@AlexTorres-qv3hv maybe that's magical to you..

@AlexTorres-qv3hv

4 жыл бұрын

@@billnorris1264 its cause there's no such thing as "OTHER" terminology....even Einstein who was troubled by entanglement had no other way to call it but spooky.....there are contradictions between videos of this author, here he states it's interaction the cause of collapse but then in another video of a more advanced experiment specifically designed to rule out physical interaction by the detectors (DCQE) he simply states having no answer to explain the results which happens to be exactly the same as in the standard DS.....

Thank you Arvin! This video helped me fill a little more comfortable with my small universe.

Thank you, Arvin Ash. Thank you for your teachings.

Thanks for kicking the woo to the curb with this. You have saved me many moments of frustrating argument; this video is now a resource I direct people to when necessary. Besides, now I can give up my nerve-wracking belief in magic.

@ArvinAsh

4 жыл бұрын

Excellent! Yes, please share because too many people falsely believe things that science does not support.

@MrNucleosome

3 жыл бұрын

The only argument you brought was "there is no science". This isn't really a strong argument. Fact is, as long as we don't know what conscoiusness is, we can't say if anything is related to it. But it's also a fact that everything in the body depends on electrical signals, every thought and every desicion. It's stupid to say that we can "collapse the wave function on a specific point" that we want it to (or is it?), but it's also stupid to say that there is no chance that quantum physics may play a role in how consciousness works.

One of the best explanations ever

I've watched videos and read about the particle/wave duality in a few places, but your video was the one where it clicked on my head. Thanks!

@ArvinAsh

3 жыл бұрын

Thanks. Glad it helped!

Maaaaaaan this video helped me understand better some of my most perplexing questions about this topic. Amazing!!!

The measurement interupting the wave makes sense.

Decent video Arvin! The 'observation vs measurement' distinction was enlightening. Now please go down the quantum eraser rabbit hole, where the 'measurement' is made well after the photon/electron/atom/buckyball/etc has passed through the double-slit, but yet the wave function behaves as though it was collapsed before the particle (or in the case of buckyballs, even a somewhat largish molecule) has even passed through the double-slit. Does the measurement somehow reach backwards through time to collapse the wave function? Thanks for your great work on this subject!

@ArvinAsh

4 жыл бұрын

Yes, that is a rabbit hole indeed. As I said in that video, I don't understand it. It is known that entangled particles share the same probability wave, so I have no issue with collapse occurring simultaneously. The wave, apparently, is shared in both space and time. Exactly how this happens is a mystery to me. I am hopeful that some new insight or equation will solve this riddle.

Thanks for the video, keep the good work up❤👍

This is excellent. Thank you very much for your content.

As anybody else in the world you have your detractors but for me you're one of the best educators on KZread. Thanks Arvin.

Thanks! Question: Gravity’s effects are proportional to distance. So gravity is always measuring the location of everything all of the time. Perhaps the wave function is really telling us how the location of a particle will alter the gravitational field of the surrounding particles. So the measurement of one is really a measurement of all the particles. Any logic to this???

@ArvinAsh

4 жыл бұрын

That's an interesting way to look at it. I am not sure.

Very clear and very helpful. I can't wait to see more of your videos.

@ArvinAsh

4 жыл бұрын

Thanks. Glad you found it helpful!

One of the most important challenges moving forward with artificial intelligence will be separating facts from fiction. This is a good place to start at the quantum level. Thank you Mr Ash .

Your videos are awesome! Difficult to find such clear and captivating explanations without any concession to superficiality or technocracy. I am a bit confused about how the wave function collapse is really meant in the Copenaghen interpretation and maybe you can help to shine the light on my doubts. The straight explanation of the wave function collapse (to which you also seem to adhere in your video) says that when you measure an observable of a particle that before the measurement had a wave function in a superposition (with different states of that observable coexisting at the same time) then the particle comes to have a wave function with 100% probability of the observable in the state that was effectively measured . So, they seem to say that both before and after the measurement the physical reality of the particle is a wave function, besides the fact that the new wave function has 100% prob for the result of the measurement, This interpretation seems to me rather inconsistent with the uncertainty principle. Indeed, if after a position measurement the wave function of the particle is one with 100% probability to find the particle in the position we saw it, then in such a wave function the velocity of the particle should be still undetermined due to the uncertainty principle (because a wave function with 100% prob for a position state must have necessarily the velocity in a superposition of different states). Nonetheless, this doesn't appear to be what actually emerges from experiments like the single slit one. Indeed, when we throw 1 photon per time through the slit, the trace left by each individual photon on the screen is well determined both in position and velocity: - the position is where we see the trace left by the photon - all components of the velocity can be derived from the position of the photon and the configuration of the experiment (the distance of the slit from the screen and the absolute velocity of the photon being the speed of light) Therefore, since a wave function with both 100% o prob for both position and velocity cannot exist (due to uncertainty principle), we should infer that after the measurement the particle is not represented by a wave function anymore. In other words, the particle comes to start being part of the macroscopic world that seems to be separated from the quantum one in the Copenaghen interpretation. So where am I wrong? Isn't the wave function collapse meant actually in the way I described above? Or rather I am making mistakes in considering both position and velocity of the photon well determined by the trace left on the screen?

@ArvinAsh

4 жыл бұрын

Exellent question! You have to remember that Heisenberg uncertainty principle applies to momentum and position. The momentum for a photon, since it does not have any mass is h/(frequency). This principle still applies, the better you know the position, the less you know about the photon's momentum, or frequency.

@francescocannistra7915

4 жыл бұрын

​@@ArvinAsh Thanks for the response Arvin, point taken. Nonetheless, I am not yet convinced because I believe that my argument is still applicable to the photon: if we know the frequency and the components of velocity then we know the momentum. Furthermore, I believe that the same argument is also applicable to other particles with mass like electrons and atoms. Honestly, my impression is that the Copenaghen interpretation is really obscure (maybe even intentionally) on the wave function collapse and the measurement problem. And when I say "obscure" I mean even in explaining what they mean, not just in how what they mean is supposed to make sense with both experiments and the theory.

consciousness is like the screen where all the energy of the cosmos dance. . Where you either becomes a dancer or an observer .

@absurdist5938

3 жыл бұрын

Good poem but not science or reality keep it that way

WOW! Observation word is now clear. Thanks Arvin

thank you so much for making a complicated subject enough simple and clear for people like me.