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All things NMR, with focus on basic theory, and on receiver hardware, from the antenna to the first local oscillator. Quantum mechanics, electromagnetism, statistical mechanics, theory of relaxation processes, radiofrequency electronics, circuit theory.


Jun
12
answered How does the electric field operator change inside an optical cavity
Apr
4
comment Spin in magnetic field and eigenvalues
I'm glad I could help out; I think we can both agree that the subject of your query is beautiful, and that Messiah is a great book.
Apr
3
comment Spin in magnetic field and eigenvalues
You state: "So eigenvalues change basis vectors and we rotate a state." I take you to mean that applying a rotation to the state changes the eigenbasis. In fact (as I note in my 1st answer) the only way to change the eigenbasis is to change the orientation of the polarizing B field.
Apr
3
answered When was Electromagnetically Induced Transparency first introduced?
Apr
3
answered Spin in magnetic field and eigenvalues
Feb
10
answered Possibility of making an experiment in a classroom to simulate DNA diffraction
Feb
3
awarded  Commentator
Jan
11
awarded  Yearling
Dec
13
comment From Quantum Mechanics to Statistical Mechanics in a Specific Case
Continuing in this vein: the thing I usually take from QM to use in SM is the eigenvalues for energy. Give me those and I can calculate the partition function; give me that and I can calculate all the thermodynamic quantities I want (e.g. energy, entropy, etc.) Hope I am not too far off topic. BTW enjoy Landau and Tolman; Fowler I know only by (its immense) reputation.
Dec
13
comment From Quantum Mechanics to Statistical Mechanics in a Specific Case
I don't usually think of where QM ends and SM begins. To me, QM is about calculating dynamics, and SM about calculating thermodynamics. They are different tools that do different jobs, and they don't obviously (to me at least) merge one into the other, and vice versa. The only place where wave functions enter SM (in my world at least) is when I need to calculate a density matrix, whose basis elements are outer products of pairs of wave-functions. But even then, the density matrix isn't intrinsically SM. OK you can calculate the density matrix at thermal equilibrium; then you're doing SM.
Dec
11
awarded  Editor
Dec
11
revised From Quantum Mechanics to Statistical Mechanics in a Specific Case
added 236 characters in body
Dec
11
answered From Quantum Mechanics to Statistical Mechanics in a Specific Case
Dec
11
answered Seeking a quality plain-language description of the Wigner-Eckart theorem
Oct
12
awarded  Enthusiast
Sep
24
awarded  Autobiographer
Jul
11
comment What is a good introductory book on quantum mechanics?
Of course there is also the Feynman lectures volume, but I would greatly disrecommend it until you are well over several humps in the subject. The stuff on identity of particles is particularly confusing for newbies.
Jul
11
comment What is a good introductory book on quantum mechanics?
As an afterthought-- years back there were some introductory books from the 'Berkeley Physics Course' and the comparable effort from MIT. The MIT book was by A. P. French-- don't remember the Berkeley author.
Jul
11
answered What is a good introductory book on quantum mechanics?
Jul
10
comment What is a good introductory book on quantum mechanics?
I second the linear algebra comment. When I took graduate Quantum in the Chemistry department at Chicago (decades ago) linear algebra was not a pre-req. Those who had had it thought the QM class (taught by surface chemist Robert Gomer) was one of the greatest ever. Those without linear algebra thought the class sucked.