Vacuum as a less hostile environment to entanglement

Details Vacuum as a less hostile environment to entanglement Vacuum as a less hostile environment to entanglement

2007-04-16

arxiv.org/abs/0704.2035v3

Phys. Rev. A 77, 032302 (2008)

Physics

Quantum Physics

Replaced by the published version

Scientific paper

10.1103/PhysRevA.77.032302

We derive sufficient conditions for infinite-dimensional systems whose entanglement is not completely lost in a finite time during its decoherence by a passive interaction with local vacuum environments. The sufficient conditions allow us to clarify a class of bipartite entangled states which preserve their entanglement or, in other words, are tolerant against decoherence in a vacuum. We also discuss such a class for entangled qubits.

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