Entanglement-assisted LOCC conversion in the quantum critical systems

Details Entanglement-assisted LOCC conversion in the quantum critical systems Entanglement-assisted LOCC conversion in the quantum critical systems

2011-11-15

arxiv.org/abs/1111.3537v1

Physics

Quantum Physics

6 pages, 5 figures, 5 tables

Scientific paper

Conversions between the ground states in quantum critical systems via entanglement-assisted local operations and classical communications (eLOCC) are studied. We proposed a new method to reveal the different convertibility by local operations when a quantum phase transition occurs. We studied the ground state local convertibility in the one dimensional transverse field Ising model, XY model and XXZ model. It is found that the eLOCC convertibility sudden changes at the phase transition points. In transverse field Ising model, the eLOCC convertibility between the first excited state and the ground state are also distinct for different phases.

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