Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, Rio de Janeiro, RJ 21941-972, Brazil.
Phys Rev Lett. 2009 Oct 16;103(16):160505. doi: 10.1103/PhysRevLett.103.160505. Epub 2009 Oct 15.
We derive several entanglement criteria for bipartite continuous variable quantum systems based on the Shannon entropy. These criteria are more sensitive than those involving only second-order moments, and are equivalent to well-known variance product tests in the case of Gaussian states. Furthermore, they involve only a pair of quadrature measurements, and will thus prove extremely useful in the experimental identification of entanglement.
我们基于香农熵推导出了几种用于双变量连续变量量子系统的纠缠判据。这些判据比仅涉及二阶矩的判据更灵敏，并且在高斯态的情况下与著名的方差积测试等效。此外，它们只涉及一对正交测量，因此在实验识别纠缠方面将非常有用。
