L1.4 First order correction to the state. Second order correction to energy

MIT 8.06 Quantum Physics III, Spring 2018
Instructor: Barton Zwiebach
View the complete course: ocw.mit.edu/8-...
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L1.4 First order correction to the state. Second order correction to energy
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[@mamtakochar8973]

This teacher is so much engrossed while teaching his subject that he never bothers to use duster....👏👏👏👏👏

[@Mizraab2912]

Such a rare Professor who goes through every single complexity in the solving of equations.

[@physicsboy3108]

Barton Zweibach is one of my favorite teacher!!💞💞♥️

[@bigdave6952]

seriously bro, this topic is so hard to understand otherwise

[@mysterious5678]

​@bigdave6952 The way sir teaches us intuition and thinking way of solving this problem is just awesome.

[@galdali10]

So much easier to understand than my lecturer… Thanks you!!!!!

[@jesseeagleman5271]

MIT rules the country

[@meghamanihaldar648]

Sir it's my humble request to make videos on the course of relativistic quantum mechanics..... your lecture is awesome sir..just awesome .....its my request to mit.... it'll help a lot

[@Jocorsha]

Thx for this lesson. Also, what is the level of the students following this course?

[@mitocw]

This is an undergraduate course. See the course on MIT OpenCourseWare for more information at: ocw.mit.edu/8-06S18.

[@sonarbangla8711]

Have we tamed the unruly extremely abstract Hilbert space, that defies renormalization?

[@not_amanullah]

Thanks 🤍❤️

[@tamimyousefi]

This guy even manages to make a poorly erased blackboard look beautiful. 6:23

[@not_amanullah]

This is helpful ❤️🤍

[@sirajuddinjalil3301]

I think for the second order correction of energy (12:34), it should be delta Hkn

[@aroojfatima2835]

U have the solution of 2nd order?

[@MudahnyaFizik]

You can work the other way round because δH is hermitian.

[@kashifhussains2951]

In mod squared , they both are same

[@amaljeevk3950]

❤

[@mamtakochar8973]

I have often seen him putting his white hands full of dust in his pockets 😂he is a true lover 😍of quantum mechanics......

[@hasanasim3980]

Thanks for posting these lectures! They are amazing. I wanted to ask why the overlap of n1 and k0 not equal to 0? Are the two vectors not orthonormal like n0 and k0?

[@Krzmbrzl]

There is no relation between n1 and k0. The only thing we know is that n1 is orthogonal to n0 but we did not establish any relation with regards to any k != n.

[@brandonsmith6052]

But he states k0 is orthogonal to n0, and since n1 is orthogonal to n0, doesn’t that mean k0 is orthogonal to n1?

[@kashifhussains2951]

No , there is no rule to relate these two states , he just states n(0) to be orthogonal to n(k) for all ks

[@kashifhussains2951]

​@@brandonsmith6052this doesn't imply the orthogonality , if you think in terms of vectors , if a is orthogonal to b and a is also orthogonal to c then b and c can also be in the same direction as well as orthogonal, this doesn't put any bound on mutual dependance of b and c

[@brandonsmith6052]

@@kashifhussains2951 thanks makes a lot of sense!

[@bigdave6952]

will this lecture series go into relativistic quantum mechanics?

[@0100hem]

at 11:56 he said hermitian, captioned "her mission" 😢

[@sayantanpal7942]

is it a grad course or under grad course????

[@johnmccrae2932]

Higher undergrad I think

[@krishnakumarsah632]

Yes you are thinking right

[@nesaralititumir6153]

9:32