Lecture 1: Classical Field Theories and Principle of Locality

MIT 8.323 Relativistic Quantum Field Theory I, Spring 2023
Instructor: Hong Liu

Principle of locality, concept of classical fields, different types of fields, action principle, classical equations of motion, examples of classical field theories

License: Creative Commons BY-NC-SA

[SkeletonBill]

To say this is beyond my field of expertise would be an understatement, but it's great that this is freely available for everyone to watch. Sometimes the internet isn't so bad.

[Robert.Marshall]

This course is beyond my current knowledge, but something was said during the very helpful intro. Hong talked about the importance of doing all problem sets to gain intuition of the subject, and that intuition will help learn and understand as the course progresses. In my current classes, I've been trying to read, take notes, and look at other sources for explanations on topics. But what he said made me realize that I am not doing the most important actions that will help me learn and master the subjects and courses I'm taking. So I thank him for that

[cr]

“Anything is not difficult if you learned it in the right way”. “Whenever you think it’s too hard, the reason might be that you have to change your perspective”.

Such openness and optimism can drastically alter the rate and thoroughness of learning. It’s great that the lecture is presented by someone who has confidence in the ability of others to comprehend the subject matter. We often overcome challenges in learning when we step back and attempt a different approach. To learn is to change the form of our minds and perceive things in a novel manner. It’s great to have this content for everyone here to view.

[syed.siraj]

MIT OCW has become an invaluable tool for students and educators alike, offering access to a wide range of subjects. In response to the growing demand from physics and mathematics students, we strongly encourage the addition of a course on Mathematical Methods for Physics. Such a course would greatly benefit those seeking to deepen their understanding of the mathematical techniques essential for tackling complex problems in physics. We sincerely appreciate MIT OCW's commitment to open education and eagerly anticipate the inclusion of this course in their already impressive catalog.
Thank you

[kim.serenaemery]

I want to say that Hong’s explanation is quite soulful. it is detailed, also helpful to understand. He delivers not only that knowledge but the way to understand it. God bless MIT and Dr. Hong Liu.

[muditchaturvedi]

I remember last year I missed lectures of quantum field theory and here it is now !
Thnx MIT !

[zacmilne]

Thoroughly enjoyed this. Dr. Liu clearly has empathy for his students as well as an intimate grasp on this difficult yet beautiful subject.

[erikisberg]

Most excellent recap I have seen on these concepts! It is a long time since my classes at U. Also followed prof. Zweibach QM courses on MIT OCW some years ago, I highly recommend those as well. MIT OCW is a great resource!
Will follow the rest of this series.

[dw]

Finally !!! I hope we also get the second and third part in a few months. OCW is the best

[gulinasirova]

sorry clicked by mistake while being high, this is dope

[naghdezartoshtian]

Please also upload QFT II and QFT III in the next semesters

[Rogue_Terminator]

Please also record the lectures of the course on QFT II as well.

[congtymienbac]

It seems that Professor Sunil Mukhi is also developing something about field theory. The language he used was quite similar to Professor Hong Liu.

[henryvoigt]

MIT, thank you for this refreshing lecture.

[abdatmohammed]

i waited so long for this, thanks MIT ❤ god bless you

[jiyoungpark]

oh, thank you, so much, for wonderful lectures, dear Professor.
what i'm thinking recently is i'm going through an era in which i have to rethink if everything's correct or not, on my side...hope everyone is well...🥰

[RagHelen]

When the Phi looks like a marshmellow on a stick, you are in the realms of physics.

[UnforsakenXII]

oi, wish this was available literally 5 years ago lol.

[LydellAaron]

I'm excited to learn from this series and Dr. Hong Liu. I think you can use quantum field theory to understand human behavior and dynamics too. Any system which exhibits quantum behaviors, traits and interactions.

[Unpug]

Finally it’s time for relativistic qft!!