Recent content by mimpim

Thanks again for the explanations. Although I do not know much about topological insulator, but your explanation for (2) was convincing to me. Now I have one more question: In one dimension (1D) there is no phase transition (for example for the 1D hopping model in a lattice) and if you could...

Thanks for the reply. It gave me lots if useful information. By your answers, it raised some more question for me. 1) by this definition of a critical system that goes through a phase transition by changing a parameter, the transverse Ising model would be a critical system?? 2) having an...

My question is a little general, and that is how we say that a system is a critical system? for example the transverse Ising model is a critical system? I think the answer is yes, since as we change the transverse field we see that there is a phase transition between ferromagnet and paramagnet...

Suppose that we have a system of particles (I am assuming a general system), and I want to find the ground state energy ##E_0##. We know that we can consider our system by canonical ensemble formalism OR by grand canonical ensemble so that ##H_G=H-\mu N## (in which ##H## is the Hamiltonian in...