A Family of Continuous Variable Entanglement Criteria using General Entropy Functions

Details A Family of Continuous Variable Entanglement Criteria using General Entropy Functions A Family of Continuous Variable Entanglement Criteria using General Entropy Functions

2010-05-06

arxiv.org/abs/1005.1045v1

Physics

Quantum Physics

8 pages, 3 figures

Scientific paper

We derive a family of entanglement criteria for continuous variable systems based on the R\'enyi entropy of complementary distributions. We show that these entanglement witnesses can be more sensitive than those based on second-order moments, as well as previous tests involving the Shannon entropy [Phys. Rev. Lett. \textbf{103}, 160505 (2009)]. We extend our results to include the case of discrete sampling, and develop another set of entanglement tests using the discrete Tsallis entropy. We provide several numerical results which show that our criteria can be used to identify entanglement in a number of experimentally relevant quantum states.

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