Recent content by chasingwind

Who first raised the many-worlds-representations? I would like to read about this one's stuff. My tutor told me that it was a Japanese but I forgot his name. :-(

How about P.A.M. Dirac's Principles of quantum mechanics? You will get the firsthand materials about "Bra" and "Ket".

Hmmm, I have been thinking of the essay by Einstein entitled as " Motivations of explorations". If science is the altar, then we are supposed to be faithful believers. However, all through my life, I have not seen anyone who meets with this standard. I do research for the intellectual pleasure...

Well, I really think we should make some changes to GRE the way it is. I am not boasting, but I had always won the highest score in the all the English exams when I was a college student. However, I only got the score of 1960 while full score is 2400 in GRE. My classmates, I believe whose...

I am thinking of solving a nonlinear equation, namely, Gross Pitaevskii equation that applied in Bose Einstein Condensates. Can I solve the equation with Mathematica? Could someone give me some clues?

Try the book "Quantum Computation and Quantum Information" by Michael A. Nielsen and I. L. Chuang. Also, John Preskill has written a thoughtful book on quantum computation. Try that!

Why everything everywhere else? Where not something somewhere else? Can you give some more detailed explanation? If I recall correctly, nonlocality can also be described within a reference frame.

Chroot, with what tool did you derive this conclusion? Could you please show how?

It is often stated in the biographies that Einstein thought about the question what he would see if he rode on one beam of light right after another beam of light. After reading special relativity, however, I still have vague understanding of this question. Would anyone give me some hints? Many...

Janitor, thanks for your hint. I am about to start my Ph.D studies and I think I will have that course. It is really a shame for a student of theoretical physics who doesn't know quantum field theory. :smile:

Janitor, could you please tell me what course of physics can handle such phenomena you have described above? Quantum field theory??

Actually I have been wondering if there is such a thing as "photons" or is it just an assumption? I am also confused about the properties of the photon. It is a wavepacket, right? Would it expand in space and time? If I recall correctly, the wavepackets of photons have continuous distribution of...

Actually the conclusion has gone too far. As I recall, Bose Einstein Condensate is a many-body ensemble and can be described by Gross Pitaeviskii equation, which is a kind of nonlinear Schrodinger equations. And this equation can be solved if certain assumptions are made.

I have to pointed out that there is a flaw in your statement, Alex. Actually states in Hilbert space could be visualized as points not only "on" the sphere, which we traditionally call "Bloch sphere", but also points within the sphere. Here are the rules: Pure states will be points "on" the...

Yuan, you can try to look for the answer to this problem in Zeng jinyan and Qian bochu's exercises' book on Quantum Mechanics. I think it has the same exercise. Good luck!