Entanglement and Spontaneous Symmetry Breaking in Quantum Spin Models

Details Entanglement and Spontaneous Symmetry Breaking in Quantum Spin Models Entanglement and Spontaneous Symmetry Breaking in Quantum Spin Models

2003-07-11

arxiv.org/abs/quant-ph/0307087v1

Phys. Rev. A 68, 060301 (2003)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.68.060301

It is shown that spontaneous symmetry breaking does not modify the
ground-state entanglement of two spins, as defined by the concurrence, in the
XXZ- and the transverse field Ising-chain. Correlation function inequalities,
valid in any dimensions for these models, are presented outlining the regimes
where entanglement is unaffected by spontaneous symmetry breaking.

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