Sudden death of distillability in qutrit-qutrit systems

Details Sudden death of distillability in qutrit-qutrit systems Sudden death of distillability in qutrit-qutrit systems

2009-04-30

arxiv.org/abs/0904.4847v2

Phys.Rev.A 80, 012331 (2009)

Physics

Quantum Physics

published version, small changes in Sec.III, 6 pages, 3 figures

Scientific paper

10.1103/PhysRevA.80.012331

We introduce the concept of distillability sudden death, i.e., free entangled states can evolve into non-distillable (bound entangled or separable) states in finite time under local noise. We describe the phenomenon through a specific model of local dephasing noise and compare the behavior of states in terms of the Bures fidelity. Then we propose a few methods to avoid distillability sudden death of states under (general) local dephasing noise, so that free entangled states can be robust against decoherence. Moreover, we find that bound entangled states are unstable in the limit of infinite time.

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