@@elitedelobos Puede ser de origen judío, pero nació en Lima, creció y estudió en Lima, graduándose de la Universidad Nacional de Ingeniería. Es recontraperuano
It's important to point out that when the polarizer is aligned at some "middle angle," then the light that comes out is NOT identical to the light that went in. Not only does only a fraction of the light come through, but that fraction now has polarization aligned with the POLARIZER, not aligned as it was going in. The polarizer "turns" the polarization angle so that the outgoing light is aligned with it. This raises the fascinating situation where you can put two polarizers at perpendicular angles together, and no light gets through. But if you then slip a third one in between the first two aligned at, say, 45 degrees, then suddenly some light does get through.
This lecture has nothing to do with me but I became entranced with his style and voice! And I actually learned something new in quantum theories. Thank you Sir.
Thank You for making it understandable !! I am a software engineer in network domain. I just watched these videos(first 4) out of curiosity, and I was able to understand a rough picture of what's trying to be conveyed. Last time I studied physics was in pre-college days.
I definitely agree when you mentioned that it's good to learn from physicists and it's useful that we have them, it is good to make new explanations for what comes next.
I can tell he is a good teacher because I understood this little "lecture" better as when my teacher taught me the same subject, even if my teacher spoke my first language (french), and this teacher speak english, that is harder to understand for me.
In some sense, the fact that he is peruvian and has as first lenguage the spanish, it make him use simpler words to do his lectures so it's easy to follow him in his thoughts.
Bertrand de Born I’m sorry MIT is one of the preeminent science and engineering schools on the planet. So this professor has earned his position in that esteemed University. Have a nice day. Also no one ridiculed anyone-I think you’re projecting-and I’ve learned quite a bit thank you much 😃😉
Bertrand de Born oh please-try this-why don’t you go to Feynman’s lectures in Physics and start reading at volume 3. You learned this in 9th grade huh? I doubt it. This is Quantum Physics-you did not learn this in 9th grade. Go to OCW, and look at the ENTIRE CLASS genius. Tell me, why do you have to use the renormalization group in Quantum Electrodynamics? How do you know you understand English? Fella, you lost all credibility when you questioned the status of MIT. All credibility. Have a nice day, remember not to go out as you don’t want to be exposed to SARS-Cov-2 and get COVID-19. There’s a good fellow. G’night 😉😃👍. Oh and we are done.
Well, the bell inequality just shows that you cannot have both a local and hidden variable theory combined. If you have a hidden variable theory, it has to be non-local, and if it's local, it has to not rely in hidden variables
Thank you. Was about to make a similar comment. Bell himself was a proponent of Pilot Wave theory aka Bohmian mechanics. A completely deterministic, nonlocal, hidden variable theory.
.... what percentage of polarizers are unemployed .. that's what I wanna' know ... it seems the good professor overlooked this dilemma during the lecture ..... hmmm .....
This professor was a former student of one of the best universities in Latin America, the prestigious National University of Engineering (Peru). He was not your average student or teacher. He is a living legend, a GENIUS. Feel privileged to receive their knowledge in your country. Saludos 🇵🇪
Si bien la UNI es una de las más díficiles de ingresar en el Perú, no es una de las mejores universidades de Latinoamérica, de hecho, en rankings de universidades, no llega al Top 60 de Latinoamérica. No es por desmerecer nada, pero las cosas como son. Y sí, el profesor es un genio.
Solo no es de las mejor de LATAM porque no sabe investigar seriamente con metodología real. Pero que cubran este hueco y verás como brillará frente al mundo 😎
I appreciate the fact he is saying what actually happens with the correct terms, instead of abstracting it all away. I watched a similar MIT lecture but the professor was using terms like "color and hardness" to avoid "confusing us" but for me it made it really hard to picture anything in my head and follow along cause electrons don't have "color" or "hardness" in the classical sense
That's an exercise to get students to understand that nature does not consist of phenomena that can be described by commutative algebras alone. It's the big insight of Heisenberg... except that he had to figure it out without help.
@@brivda I had written that comment a month ago. I have no recollection what this video was about or what other video I was thinking about. Not to mention TH-cam won't allow video comments.
There is a difference in the way of thinking of the inequality sign (or information bra-ket) when we see light as Einstein inertial system and when we see light as quantum entanglement information. Is a very effective inertial vector. In quantum information entanglement, since it is not an inertial system, it is considered as |photon:〈xψy〉:photon｜, and it is an information system that should be distinguished from the inertial system, but (photon:ψ>)=(photon: :ψ〉), the optical inertial system and the optical information system are equivalent. This is an important lecture from the perspective of consideration.
11:00- Really true, consistent with the wisdom there are more unknown unknowns than known unknowns. 15:25- This statement makes the superposition concept a bit easier to comprehend.
Nothing he says explains to you where superposition really comes from. If I were to test you orally on that question, I could easily fail you, right now.
Lo cierto que la UNI no hizo nada por él, pudo haber estudiado en cualquier otra universidad e igual hubiera sobresalido, más bien la UNI debería estar agradecido de haber acogido a una mente tan brillante
The funniest lie ever; if they cannot determine it, then the determinism is lost. The amount of grandiosity of the title of this video is ultimate; despite it appears to be super humble.
Our ability to determine is irrelevant if there are no local hidden variables. Bell's experiments prove that particles literally do not inherently contain the values needed to predict their behavior.
@@eoinlanier5508 There are no particles in nature. There are only quanta of energy. That there can be no local hidden variables follows directly from relativity. We never needed Bell for that. I would advise you to read Bell's paper. He says so himself at the end of it. ;-)
Nonlocal hidden variables would not be deterministic, though. If information can travel at infinite speed, then events are determined instantaneously, not by past states.
Prof. Zwiebach is actually very good, but for any "not perfect English speakers", it was absolutely necessary the presence of subtitles....in English! Anyway, thank you for the lesson and greetings from Athens, Greece.
We can write an expression for a wave, psi = exp(ikx-wt), is complex function. That's it . We represent sinusoidal waves by complex function. It's a representation
What a lovely man. So calm and precise. I remember being introduced to Imaginary numbers at school. POW. Mind blown. Two years later in college, they're vectors. Oh. Why didn't they say that ? On a par with year 2 maths class. Ok. Let's consider n. n is any number ! Pow. n is clearly a letter. Dropped out of the top maths class soon after. Got back in again though. Just the whole year missed and forever holding on by my finger nails since.
the clue is in the title guys - Open Course. For anyone who wants to watch. And you've got to be pretty good at your subject to explain quantum physics so that anyone can even approach understanding that!
The notion of photons and their relationship to determinism invites intriguing questions about the fundamental nature of reality. Photons, as quanta of light, exhibit behaviors that can appear inherently probabilistic, particularly when analyzed through the lens of quantum mechanics. The famous double-slit experiment demonstrates that photons can behave as both particles and waves, exhibiting interference patterns that suggest an underlying randomness to their behavior. This challenges classical notions of determinism, which hold that future states of a system can be precisely predicted given complete knowledge of its initial conditions. Instead, the behavior of photons often embodies unpredictability, highlighting a universe where inherent uncertainty reigns, thereby prompting deeper philosophical inquiries into the fabric of reality and whether determinism can truly coexist with the principles governing quantum mechanics.
Even Bell himself didn’t think that he proved the impossibility of hidden variables. Travis Norsen: in his book (titled ‘Foundations of Quantum Mechanics’) says: “There is a kind of rich and tragic irony here, in citing Bell as having supposedly refuted hidden variables theories …, Bell’s theorem was actually inspired by Bohm’s 1952 pilot-wave theory papers, and indeed Bell remained far and away the pilot-wave theory’s greatest champion until his death in 1990.”
Polarizers are not filters, they are re-radiators. Imagine two antennas connected by a coaxial cable. The interfaces between glass and air are the antennas and the glass is the coax. Light impinges the front face, just as an antenna. If the antenna's polarization matches, the light enters the glass, propagates and exits according to the polarization of the back face (antenna) of the glass. Using this correct model of a polarizer explains polarization completely and without mystery. Bell's Theorem is not required, only Maxwell's equations.
The figure in this explanation would be better if shown in three dimensions. The professor’s explanation describes a plane wave oscillating in a plane parallel to the z-axis at an angle alpha to x--z plane. Then the closer the plane of the wave gets to the x-z plane, the greater the transmission of the wave through the polarizer.
Its interestinf how one of the best universities in the world still uses regular board and chalk to teach and not ppt preasentations and whiteboard and markers
So with respect to Linearity discussed in previous lectures, Beam of photon should be described as Beam |photon_alpha> = a * cos_alpha * |photonX> + a * sin_alpha |photonY> Where a is some constant
Bell just showed that a HVT is non local and, if the formalism of spin is correct, that it is also contextual. Look at the interpretation of spin in the works of David Hestenes and other physicists, and contextuality desappares
Very poorly presented. Newtonian "particles" are correctly called "corpuscles" in physics. The word "particle" is reserved for the approximation of the motion of an extended classical body by the motion of its center of mass. In the Kepler problem the planet is treaded in the particle approximation because we do not care about it rotation and internal degrees of freedom (in quantum mechanics we do care about spin). Quanta are amounts (not packets!) of energy, momentum, angular momentum and charge that get exchanged irreversibly between systems. They are system property changes. That is how you do this correctly. Easy, right? So why is a string theorist waffling with these trivial definitions? He should know them in his sleep.
que hace de bueno por nuestro país , NI MIERDA , es uno mas del montón , la verdadera persona que vale la pena y que todos recordarian es aquella que no olvida sus raices y apesar de las circunstancias sigue ahi aportando al desarrollo en este caso del PERU , grandes mentes que se largan a enrriquecer a un extraño , para mi este tipo es uno mas sin gloria.
@@milanL-z4xtheoretical computer science. But his statement is fairly basic: our knowledge of the object makes the object nondeterminstic even though the object is determined by something else outside the system, or intrinsic of the object.
@@Nate3145-zt8rh Im studying physics at university right now. I just got in to the concept of quantum mechanics and the loss of determinism. What do you mean with the object is determined by something else outside the system, or intrinsic of the object? Quantum mechanics says that probability is inherent in nature and not just a limitation to calculate. This ofcourse has a huge philosophical impact, thats why i want to be sure i understand it right. So what exactly are you saying, how is determinism still a part of nature/reality, and can you give me a simple site or reference of what you are talking about? Thank you.
@milanlibens209 oh sweet! If you are interested in the concept of "randomness" theoretical cs/ mathematics is a good place to learn about it. Right now I'm a pure maths student at university
Que nivel de clase de este profesor . Orgullo peruano .
No es peruano es Judío Ultramar. Judío ...
@@elitedelobos Puede ser de origen judío, pero nació en Lima, creció y estudió en Lima, graduándose de la Universidad Nacional de Ingeniería. Es recontraperuano
@@juanrodrigovalencia No. El siempre la tuvo clara. Es un judío y tiene nacionalidad judía.
@@elitedelobos En serio? Y tiene pasaporte "judío"? Por favor JAJAJAJJAJA
@@elitedelobosmira mongol si Vienes a opinar sin info mejor ni opines lapiz😅
This is brilliant. This professor explains things extremely clearly.
Agreed totally. His pacing also is fantastic
Lol.
He is a pseudo scientist!
I'm 12 and I got it too
Does he tho ?
Besides the wonderful clarity in his lecture, I am amazed at his very clear, beautiful, and organized writing on the board.
El mejor alumno de la historia de la UNI.
Es de mi facultad
@@ARCP-mj1mrq nunca lo ejerció
@@paultarazona7989XD
@@paultarazona7989😂😂
Buena la profesión le sirvió para hacer investigación, dónde invierten otros países extranjeros.
Great Teacher. Takes time and explains well. Defined indeterminism very clearly.
Barton, el único estudiante en la historia de la UNI que se graduó antes de terminar su carrera.
Well spoken with excellent handwriting. A rarity among physics professors
It's important to point out that when the polarizer is aligned at some "middle angle," then the light that comes out is NOT identical to the light that went in. Not only does only a fraction of the light come through, but that fraction now has polarization aligned with the POLARIZER, not aligned as it was going in. The polarizer "turns" the polarization angle so that the outgoing light is aligned with it. This raises the fascinating situation where you can put two polarizers at perpendicular angles together, and no light gets through. But if you then slip a third one in between the first two aligned at, say, 45 degrees, then suddenly some light does get through.
This lecture has nothing to do with me but I became entranced with his style and voice! And I actually learned something new in quantum theories. Thank you Sir.
there's something about writing on a chalkboard that just makes it much better than presentation slides as a teaching medium for showing equations
This professor is outstanding! It’s been over 30 years since I studied QM/QP. Never used it so forgot it. Great reintroduction. Thank you sir.
Sure, sure. If you had studied quantum mechanics for good, then you would know that he kind of sucks, of course. ;-)
This exposition is as clear as can be
Such amazing job Mr. Zwiebach! Thank you...
Thank You for making it understandable !! I am a software engineer in network domain. I just watched these videos(first 4) out of curiosity, and I was able to understand a rough picture of what's trying to be conveyed. Last time I studied physics was in pre-college days.
peruvian's proud!
@@andressuarez6153 así es.
"It's a debacle! A total disaster!"
This guy is really good. A brilliantly clear explanation. Moving slowly enough for a dummy like me to grasp it. No wasted words.
Man, I just enjoy listening to his voice....
Me tooo I swear to God 😄😄😄😄
I definitely agree when you mentioned that it's good to learn from physicists and it's useful that we have them, it is good to make new explanations for what comes next.
Brilliant lecture given by Barton Zweibach Sir .....
I can tell he is a good teacher because I understood this little "lecture" better as when my teacher taught me the same subject, even if my teacher spoke my first language (french), and this teacher speak english, that is harder to understand for me.
In some sense, the fact that he is peruvian and has as first lenguage the spanish, it make him use simpler words to do his lectures so it's easy to follow him in his thoughts.
Well spoken with excellent handwriting. A rarity among physics professors. Maravilha de aula! Eu diria um pacote de fótons de aula! Parabéns!!.
What a wonderful teacher you are, if I may say so. Thank you for sharing this lecture with the public. 🤓
A shill can only repeat the obvious -- it's in the public.
🙂
Bertrand de Born really?
Bertrand de Born I’m sorry MIT is one of the preeminent science and engineering schools on the planet. So this professor has earned his position in that esteemed University. Have a nice day. Also no one ridiculed anyone-I think you’re projecting-and I’ve learned quite a bit thank you much 😃😉
Bertrand de Born oh please-try this-why don’t you go to Feynman’s lectures in Physics and start reading at volume 3.
You learned this in 9th grade huh? I doubt it. This is Quantum Physics-you did not learn this in 9th grade. Go to OCW, and look at the ENTIRE CLASS genius.
Tell me, why do you have to use the renormalization group in Quantum Electrodynamics?
How do you know you understand English?
Fella, you lost all credibility when you questioned the status of MIT. All credibility.
Have a nice day, remember not to go out as you don’t want to be exposed to SARS-Cov-2 and get COVID-19. There’s a good fellow. G’night 😉😃👍. Oh and we are done.
Well, the bell inequality just shows that you cannot have both a local and hidden variable theory combined. If you have a hidden variable theory, it has to be non-local, and if it's local, it has to not rely in hidden variables
Yeah pretty good argument 🤷♂️
Thank you. Was about to make a similar comment. Bell himself was a proponent of Pilot Wave theory aka Bohmian mechanics. A completely deterministic, nonlocal, hidden variable theory.
Thank you MIT and sir. Wish him long life and happiness.
"That's what polarizers do for a living" :)
lol
.... what percentage of polarizers are unemployed .. that's what I wanna' know ... it seems the good professor overlooked this dilemma during the lecture ..... hmmm .....
The polarizer proves that light is a wave and not a particle.
@Phoenix do you think Trump is a real president?
@Phoenix when the Suits come for you, don't answer the door.
I really like his handwriting
This looks so passionate
In that case I advise you to check out Nima Arkani-Hamed.
This professor is one of the best
La leyenda de la UNI-PERU , Barton Zwiebach👏🏻👏🏻👏🏻
Grande Zwiebach, recuerdo que nos metiamos unos dotitas en el lab despues de los finales
XD
XD
😂
This professor was a former student of one of the best universities in Latin America, the prestigious National University of Engineering (Peru).
He was not your average student or teacher. He is a living legend, a GENIUS.
Feel privileged to receive their knowledge in your country.
Saludos 🇵🇪
No me di cuenta de que era barton, such a precious gem of our country. It's a delight hearing his class
Si bien la UNI es una de las más díficiles de ingresar en el Perú, no es una de las mejores universidades de Latinoamérica, de hecho, en rankings de universidades, no llega al Top 60 de Latinoamérica. No es por desmerecer nada, pero las cosas como son. Y sí, el profesor es un genio.
JJAJAJAJJ prestigiosa por donde wbonazo
No exageres man, no es de la mejores de Latinoamérica pero si tiene su prestigio
Solo no es de las mejor de LATAM porque no sabe investigar seriamente con metodología real. Pero que cubran este hueco y verás como brillará frente al mundo 😎
Wow !...A professor who writes cursively ! 🎊🎉🎊
thank you MIT, thank you sir, and thanks to whole staff there.
This teacher´s explaination is really good. Hats Off
I appreciate the fact he is saying what actually happens with the correct terms, instead of abstracting it all away. I watched a similar MIT lecture but the professor was using terms like "color and hardness" to avoid "confusing us" but for me it made it really hard to picture anything in my head and follow along cause electrons don't have "color" or "hardness" in the classical sense
That's an exercise to get students to understand that nature does not consist of phenomena that can be described by commutative algebras alone. It's the big insight of Heisenberg... except that he had to figure it out without help.
This must be the best lecture on loss of determinism on the net, much thanks.
You lost determinism when you flip a coin. Write parents to send more money.
I've seen better
No
@@nassimabed care to share the better video?
@@brivda I had written that comment a month ago. I have no recollection what this video was about or what other video I was thinking about. Not to mention TH-cam won't allow video comments.
Dear Professor, As a prof myself and now your student, I realized there is life into those mathematical equations
There is a difference in the way of thinking of the inequality sign (or information bra-ket) when we see light as Einstein inertial system and when we see light as quantum entanglement information. Is a very effective inertial vector. In quantum information entanglement, since it is not an inertial system, it is considered as |photon:〈xψy〉:photon｜, and it is an information system that should be distinguished from the inertial system, but (photon:ψ>)=(photon: :ψ〉), the optical inertial system and the optical information system are equivalent. This is an important lecture from the perspective of consideration.
Barton Zwiebach the genius from Perú.
11:00- Really true, consistent with the wisdom there are more unknown unknowns than known unknowns.
15:25- This statement makes the superposition concept a bit easier to comprehend.
Nothing he says explains to you where superposition really comes from. If I were to test you orally on that question, I could easily fail you, right now.
De los mejores profesores de física.
Si estuviera traducido al español, seria genial. Excelente Profesor. La UNI siempre destacando.
Lo cierto que la UNI no hizo nada por él, pudo haber estudiado en cualquier otra universidad e igual hubiera sobresalido, más bien la UNI debería estar agradecido de haber acogido a una mente tan brillante
Aprende inglés en vez de perdir subtitulos, por eso los egresados de la uni muchas veces terminan enseñando de profes en academias 🤣🤣🤣
Ese Barton solo copiaba en la uni yo lo conozco le ponían 20 los profes solo porque su viejita era bien bandida la prra😅
@@s0ulseeker.? Por no aprender inglés?, mano como en toda u siempre hay gente que no ejerce su carrera.
@@luchomarranoconcuerdo
just now found this by chance - he is excellent. if they make a movie about him, he would be played by Dustin Hoffman.
Good and clear teacher. Good tempo and very to the point.. Absolutely well done and definitely keep it up!!! .
Wow. The universe it truly random. Thank you.
The funniest lie ever; if they cannot determine it, then the determinism is lost. The amount of grandiosity of the title of this video is ultimate; despite it appears to be super humble.
Our ability to determine is irrelevant if there are no local hidden variables. Bell's experiments prove that particles literally do not inherently contain the values needed to predict their behavior.
@@eoinlanier5508 There are no particles in nature. There are only quanta of energy. That there can be no local hidden variables follows directly from relativity. We never needed Bell for that. I would advise you to read Bell's paper. He says so himself at the end of it. ;-)
He said that hidden variables are not possible, but bells theorem says local hidden variables. Nonlocal ones can exist
Nonlocal hidden variables would not be deterministic, though. If information can travel at infinite speed, then events are determined instantaneously, not by past states.
I want everyone to pronounce photons as he does.
Good and clear teacher. Good tempo and very to the point.
Prof. Zwiebach is actually very good, but for any "not perfect English speakers", it was absolutely necessary the presence of subtitles....in English! Anyway, thank you for the lesson and greetings from Athens, Greece.
Brilliant and passionate exposition. His mannerisms remind me of Saul from Pi
Looks like Harisson Ford
After the lecture he's going off to fight Nazis and discover stuff
Thats Harrison ford doing an accent
We can write an expression for a wave, psi = exp(ikx-wt), is complex function. That's it . We represent sinusoidal waves by complex function. It's a representation
Good Job Professor
Maravilha de aula! Eu diria um pacote de fótons de aula! Parabéns!!
What a lovely man. So calm and precise.
I remember being introduced to Imaginary numbers at school. POW. Mind blown.
Two years later in college, they're vectors. Oh. Why didn't they say that ?
On a par with year 2 maths class. Ok. Let's consider n. n is any number ! Pow. n is clearly a letter. Dropped out of the top maths class soon after.
Got back in again though. Just the whole year missed and forever holding on by my finger nails since.
Now I understand
What entanglement actually means !
Extraordinary explaination
What an outstanding professor!
Glad you figured out that determinism is voluntary.
the clue is in the title guys - Open Course. For anyone who wants to watch. And you've got to be pretty good at your subject to explain quantum physics so that anyone can even approach understanding that!
Wow, clearly explained and at a pace I can work with. Gonna be watching more of these.
Merveilleux cours de physique ! Merci de partager toutes ces explications si claires 👍
Increíble un ilustre Peruano haciendo patria en el extranjero.
Wow, this takes me back to undergrad QM. Sets good foundation for QED. Well done professor!
This professor really impressed me😊😊.
The notion of photons and their relationship to determinism invites intriguing questions about the fundamental nature of reality. Photons, as quanta of light, exhibit behaviors that can appear inherently probabilistic, particularly when analyzed through the lens of quantum mechanics. The famous double-slit experiment demonstrates that photons can behave as both particles and waves, exhibiting interference patterns that suggest an underlying randomness to their behavior. This challenges classical notions of determinism, which hold that future states of a system can be precisely predicted given complete knowledge of its initial conditions. Instead, the behavior of photons often embodies unpredictability, highlighting a universe where inherent uncertainty reigns, thereby prompting deeper philosophical inquiries into the fabric of reality and whether determinism can truly coexist with the principles governing quantum mechanics.
Photons aren't probabilistic and they are neither waves nor particles. These are all just nonsensical statements that are caused by shoddy thinking.
Now I know what good teaching is.
This is a strange world where we know so much but are somehow missing the point completely.
Even Bell himself didn’t think that he proved the impossibility of hidden variables. Travis Norsen: in his book (titled ‘Foundations of Quantum Mechanics’) says:
“There is a kind of rich and tragic irony here, in citing Bell as having supposedly refuted hidden variables theories …, Bell’s theorem was actually inspired by Bohm’s 1952 pilot-wave theory papers, and indeed Bell remained far and away the pilot-wave theory’s greatest champion until his death in 1990.”
Hello Dr. I am 12 years and this video was great , and I wish to be more specification and harder. Thank you
excellent explanation ! Congrats, professor !
Thanks for the lectures!
It's nice to see MIT still using chalk boards, very OG.
_Reminded me of _*_how entertaining physics really is!_*
Polarizers are not filters, they are re-radiators. Imagine two antennas connected by a coaxial cable. The interfaces between glass and air are the antennas and the glass is the coax. Light impinges the front face, just as an antenna. If the antenna's polarization matches, the light enters the glass, propagates and exits according to the polarization of the back face (antenna) of the glass. Using this correct model of a polarizer explains polarization completely and without mystery. Bell's Theorem is not required, only Maxwell's equations.
Can you give me any reference (book or article) that supports your re-radiator model of polarization. Many thanks for your insight.
The figure in this explanation would be better if shown in three dimensions. The professor’s explanation describes a plane wave oscillating in a plane parallel to the z-axis at an angle alpha to x--z plane. Then the closer the plane of the wave gets to the x-z plane, the greater the transmission of the wave through the polarizer.
Doesn't Bell's inequality say that no LOCAL hidden variables can satisfy quantum physics meaning that NON-LOCAL hidden variables could satisfy it?
Absolutely brilliant. Thank you for sharing.
Its interestinf how one of the best universities in the world still uses regular board and chalk to teach and not ppt preasentations and whiteboard and markers
Totally concept clear from this lecture.
Very nice presentation of a very confusing reality.
He is very good teacher…
Excellent lecture!
Porfesor Barton, alumno de la UNI - PERU.
Very good lecture Sir. Thanks 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏
So with respect to Linearity discussed in previous lectures, Beam of photon should be described as
Beam |photon_alpha> = a * cos_alpha * |photonX> + a * sin_alpha |photonY>
Where a is some constant
These lectures are awesome!
Great explanation
If all my teachers are this good at explain8ng, I might have turned into a professional student.
Bell just showed that a HVT is non local and, if the formalism of spin is correct, that it is also contextual. Look at the interpretation of spin in the works of David Hestenes and other physicists, and contextuality desappares
Wow! A simple perfect explaniation
Very poorly presented. Newtonian "particles" are correctly called "corpuscles" in physics. The word "particle" is reserved for the approximation of the motion of an extended classical body by the motion of its center of mass. In the Kepler problem the planet is treaded in the particle approximation because we do not care about it rotation and internal degrees of freedom (in quantum mechanics we do care about spin). Quanta are amounts (not packets!) of energy, momentum, angular momentum and charge that get exchanged irreversibly between systems. They are system property changes. That is how you do this correctly. Easy, right? So why is a string theorist waffling with these trivial definitions? He should know them in his sleep.
Barton
Excellent professor
Thanks sir for this beautiful lecture from India.
Great lecturer, thanks for posting this
I like how the profesor teaches basics unlike how i learned in college .
This course rules!😊
que hace de bueno por nuestro país , NI MIERDA , es uno mas del montón , la verdadera persona que vale la pena y que todos recordarian es aquella que no olvida sus raices y apesar de las circunstancias sigue ahi aportando al desarrollo en este caso del PERU , grandes mentes que se largan a enrriquecer a un extraño , para mi este tipo es uno mas sin gloria.
great lecture always great onlyyyyy.......hands offf
No loss of determinism. Loss of deterministic knowledge
How can i understand more about the concept you commented?
@@milanL-z4xtheoretical computer science. But his statement is fairly basic: our knowledge of the object makes the object nondeterminstic even though the object is determined by something else outside the system, or intrinsic of the object.
@@milanL-z4xin particular computability theory and complexity theory
@@Nate3145-zt8rh Im studying physics at university right now. I just got in to the concept of quantum mechanics and the loss of determinism. What do you mean with the object is determined by something else outside the system, or intrinsic of the object? Quantum mechanics says that probability is inherent in nature and not just a limitation to calculate. This ofcourse has a huge philosophical impact, thats why i want to be sure i understand it right. So what exactly are you saying, how is determinism still a part of nature/reality, and can you give me a simple site or reference of what you are talking about? Thank you.
@milanlibens209 oh sweet! If you are interested in the concept of "randomness" theoretical cs/ mathematics is a good place to learn about it. Right now I'm a pure maths student at university
Nicely done.
Thank you Barton Zwiebach and MIT.