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arxiv: quant-ph/0610263 · v1 · submitted 2006-10-31 · 🪐 quant-ph

Estimating the Degree of Entanglement of Unknown Gaussian States

classification 🪐 quant-ph
keywords entanglementgaussianmeasurementsstatesbipartitecannotcovariancedegree
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We give an introduction to Gaussian states and operations. A discussion of the entanglement properties of bipartite Gaussian states in terms of its covariance matrix follows. It is explained how entanglement can be witnessed using feasible measurements, e.g. homodyne measurements. We find that the outcome of such a measurements cannot only witness but also quantify entanglement.

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  1. Revisiting Gaussian genuine entanglement witnesses with modern software

    quant-ph 2024-12 unverdicted novelty 4.0

    Convex optimization formulations and an analytical symplectic trace expression are introduced to reconstruct physical Gaussian covariance matrices and witness genuine multipartite entanglement from experimental data.