NONEQUILIBRIUM STEADY-STATE IN A QUANTUM SYSTEM - ONE-DIMENSIONAL TRANSVERSE ISING-MODEL WITH ENERGY CURRENT

Citation
T. Antal et al., NONEQUILIBRIUM STEADY-STATE IN A QUANTUM SYSTEM - ONE-DIMENSIONAL TRANSVERSE ISING-MODEL WITH ENERGY CURRENT, Physical review letters, 78(2), 1997, pp. 167-170
Citations number
19
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
78
Issue
2
Year of publication
1997
Pages
167 - 170
Database
ISI
SICI code
0031-9007(1997)78:2<167:NSIAQS>2.0.ZU;2-F
Abstract
We study the nonequilibrium steady states of an Ising chain in a trans verse field h by investigating the effect of a field h, which drives t he current of energy. The zero-temperature, h-h phase diagram is deter mined exactly, and it is found that the energy current appears continu ously above a threshold lambda > lambda(c)(h). The long-range magnetic order (present for h < h(c),lambda < lambda(c)) is destroyed in the c urrent-carrying state where the correlations are characterized by powe r-law, oscillatory decay. The mechanism which generates the power-law correlations in the current-carrying state is discussed.