Related papers: Detecting entanglement of unknown continuous variable states with random measurements

Detecting entanglement of unknown continuous variable states with random measurements

URL: http://arxiv.org/abs/2007.05650v1
Date: Fri, 10 Jul 2020 23:56:39 GMT
Title: Detecting entanglement of unknown continuous variable states with random measurements
Authors: Tatiana Mihaescu, Hermann Kampermann, Giulio Gianfelici, Aurelian Isar, Dagmar Bruss
Abstract summary: We propose new linear constraints characterizing the entanglement witnesses based on second moments. We use them in a semidefinite program providing the optimal entanglement test for given random measurements.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We explore the possibility of entanglement detection in continuous variable systems by entanglement witnesses based on covariance matrices, constructible from random homodyne measurements. We propose new linear constraints characterizing the entanglement witnesses based on second moments, and use them in a semidefinite program providing the optimal entanglement test for given random measurements. We test the method on the class of squeezed vacuum states and study the efficiency of entanglement detection in general unknown covariance matrices.

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