Nonequilibrium properties in the transverse XX chain.
We investigate the nonequilibrium properties of the transverse XX chain. The steady state can be interpreted as the equilibrium state or the ground state of the effective Hamiltonian, which depends on the initial state. We also study the physical properties of the state at various temperatures, in particular, the effects of quantum phase transition.
Ogata
Yoshiko
Y
Department of Physics, Graduate School of Science, University of Tokyo, Hongo, 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan. ogata@monet.phys.s.u-tokyo.ac.jp