Determination of continuous variable entanglement by purity measurements

Details Determination of continuous variable entanglement by purity measurements Determination of continuous variable entanglement by purity measurements

2003-10-23

arxiv.org/abs/quant-ph/0310150v4

Phys.Rev.Lett. 92 (2004) 087901

Physics

Quantum Physics

4 pages, 3 EPS figures. Final version

Scientific paper

10.1103/PhysRevLett.92.087901

We classify the entanglement of two--mode Gaussian states according to their
degree of total and partial mixedness. We derive exact bounds that determine
maximally and minimally entangled states for fixed global and marginal
purities. This characterization allows for an experimentally reliable estimate
of continuous variable entanglement based on measurements of purity.

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