Lecture - 11 Quantum Physics

[@MsMyrule]

I would never complain of having to sit through more than an hour lecture if we had such teachers.. So grateful for these lectures.

[@naimulhaq9626]

Prof. Balakrishnan makes quantum mechanics so easy. The quality of the videos are also superb. Similar lectures by Susskind are of a later date but unclear and inaudible. Thank you professor.

[@tanmaysingal0]

Topics covered (in more detail): 1. The relationship between the probability of tunnelling and the height and width of the potential barrier; how metastable states arise. 2. How do symmetries (particularly parity symmetry) of the Hamiltonian reflect in the energy eigenstates. More generally, when a symmetry operator commutes with the Hamiltonian, what does this tell you about the eigenstates of the Hamiltonian, particularly when the Hamiltonian is non-degenerate (which it will be in one-dimensional systems with simply-connected configuration space)? 3. Employing Bohr's quantisation as a tool/trick to see how the non-degenerate monotonically increasing sequence of eigenvalues varies, when the potential energy operator in x-basis asymptotically goes to infinity. 4. Finally, the simple-harmonic oscillator, first using Dirac's operator method, then obtain the position space representation using a neat trick from the Dirac operator method.

[@robbiemallett]

This lecture is on the simple harmonic oscillator, introducing creation and annihilation operators.

[@Dr.HazharGhaderi]

Prof. Balakrishnan, you motivate and inspire, thank you!

[@nikhilsamy]

great one...harmonic oscillator is in hands now...thank you so much sir

[@pacoramirez5108]

Excelent material, thank you from Fresnillo, Mexico

[@dipankardas8519]

Best lecture that ever i have heard

[@ramijahamed5119]

great lecture... thnks prof V Balakrishnan... the graph of 1st excited state should be in 3rd and 1st quadrants...

[@mainaknandi9118]

I think when you include the phase factor of the wavefunction, that would be not much of a problem.

[@sandeeppatidar1106]

Amazing lecture

[@dr.saravananmanickam8997]

Can someone explain why the total energy is indicated in the potential energy graph? Time @1:13:20

[@divyanshshrimali2651]

These are just plots of energy levels over the potential plots...just to track different levels and aid in drawing phase space plots. This can be generally be seen in classical mechanics books.

[@supriyohalder4851]

Very Helpful.Thanks Sir.

[@hrisheekeshprabhakar5555]

@37:52 you had us in the first half not gonna lie

[@srikanthtupurani6316]

What about nonconservative force fields. We cannot do these things. We cannot find a function v(x). How to study such things. I have not seen anyone talking about this thing.

[@Kumarishucom]

Good class Guru ji 👑🎊🎊🎊🎊🎗️

[@kenneywot]

sir, Shall I get Your notes or any written material, any book as well

[@AraDeanMaffy]

ordering theorem

[@AlexandreHefren]

1:22, whats the name of the Theorem??

[@MrRajveersingh2004]

Node Theorem

[@theadvancelearning]

Follow Griffith pages - 41-50

[@kenneywot]

sir, Shall I get Your notes or any written material,

[@aldrinbe7290]

@dibyanshu.barthwal1998 dibyanshu.barthwal1998 Thanks. That really helped

[@quantumkarthik]

@@aldrinbe7290 Sir Can You Please Provide Me with Notes If you have got them, I am not able to see earlier replies. Thank You In Advance.

[@aldrinbe7290]

@@quantumkarthik you can find the notes in the transcript in the following link nptel.ac.in/courses/122/106/122106034/

[@quantumkarthik]

@@aldrinbe7290 No Sir I am Aware of the transcripts from the NPTEL sites I ment the actual Notes provided to students there. I know been 11 years by now and it's hard to find but I was supposing if any of the students who studied under him might have a chance. A probability if you may to have his Notes. So that's what I was aiming for😅

[@aldrinbe7290]

@@quantumkarthikoh first off..don't call me sir😅I'm a student like you. This comment thread was actually talking about the transcript notes..