Nonequilibrium steady states on 1-d lattice systems and Goldstone theorem
نویسنده
چکیده
On one-dimensional two-way infinite lattice system, a property of stationary (space-) translationally invariant states with nonvanishing current expectations are investigated. We consider GNS representation with respect to such a state, on which we have a group of space-time translation unitary operators. We show, by applying Goldstone-theoremlike argument, that spectrum of the unitary operators, energy-momentum spectrum with respect to the state, has a singularity at the origin. e-mail: [email protected]
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تاریخ انتشار 2003