Two qubits entanglement dynamics in a symmetry-broken environment

Details Two qubits entanglement dynamics in a symmetry-broken environment Two qubits entanglement dynamics in a symmetry-broken environment

2004-02-10

arxiv.org/abs/quant-ph/0402073v1

Phys. Rev. A 69, 2345 (2004)

Physics

Quantum Physics

10 pages, 2 figures

Scientific paper

10.1103/PhysRevA.69.062308

We study the temporal evolution of entanglement pertaining to two qubits interacting with a thermal bath. In particular we consider the simplest nontrivial spin bath models where symmetry breaking occurs and treat them by mean field approximation. We analytically find decoherence free entangled states as well as entangled states with an exponential decay of the quantum correlation at finite temperature.

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