Recent content by Billy Yang

Maybe_Memorie: Could you please tell me what the conserved quantities are in an ising model and how to express it using Pauli matrix? I am especially interested in this. Billy

Dear Maybe_Memorie: Thanks for your elaborate response and it really helps me a lot, although I can't fully understand the concepts you mentioned. But I am interested in the theory you introduced, especially its group theory parts. Thanks again! Billy

If I have an arbitrary quantum many-body model, what is the method to calculate the the conserved quantities if the model is integrable. If it is hard to explain, can you recommend some relevant books for me? Thanks a lot!

:-) Good papers. Do you think the term equilibrium for a quantum system is weird? In Rigol's paper, PRL, 98, 050405, the measure for a quantum system to reach equilibrium is whether the momentum distribution becomes averaged.

Thanks for your response. After carefully viewing this paper, I found the hypothesis in this paper is interesting. Thanks again.

Recently, the properties of nonequilibrium many-body quantum systems have aroused great curiosity of physicists. Numerous papers have been published about this area. But how do we measure how far the system is from equilibrium states? There are several proposals have been published, for...