Quantum phase transition in a far from equilibrium steady state of XY spin chain

Details Quantum phase transition in a far from equilibrium steady state of XY spin chain Quantum phase transition in a far from equilibrium steady state of XY spin chain

2008-05-19

arxiv.org/abs/0805.2878v2

Phys. Rev. Lett. 101, 105701 (2008)

Physics

Quantum Physics

4 pages (in RevTex) with 5 figures - essentially identical with a published version

Scientific paper

10.1103/PhysRevLett.101.105701

Using quantization in the Fock space of operators we compute the non-equilibrium steady state in an open Heisenberg XY spin 1/2 chain of finite but large size coupled to Markovian baths at its ends. Numerical and theoretical evidence is given for a far from equilibrium quantum phase transition with spontaneous emergence of long-range order in spin-spin correlation functions, characterized by a transition from saturation to linear growth with the size of the entanglement entropy in operator space.

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