arXivDaily arXiv每日学术速递 周一至周五更新
arXiv quant-ph/9806049quant-ph
收藏

Bell不等式、多光子态和相空间分布

Bell's inequalities, multiphoton states and phase space distributions

Arvind, N. Mukunda

摘要:

量子光学非经典性和贝尔不等式的破坏之间的联系进行了探讨。对量子辐射的一般态,给出了电磁场的Bell型不等式,其违反与场的其它非经典性质有关。这是通过考虑具有任意数量光子的状态并仔细识别其期望值不允许任何局部隐变量描述的埃尔米特算子来实现的。我们涉及违反这些多光子不等式的相空间分布函数,如对角相干态分布函数和维格纳函数的属性。最后,分析了具有高斯Wigner分布的四模态族,指出了Bell型不等式的破坏与压缩的非经典性质之间的联系。

英文摘要:

The connection between quantum optical nonclassicality and the violation of Bell's inequalities is explored. Bell type inequalities for the electromagnetic field are formulated for general states of quantised radiation and their violation is connected to other nonclassical properties of the field. This is achieved by considering states with an arbitrary number of photons and carefully identifying the hermitian operators whose expectation values do not admit any local hidden variable description. We relate the violation of these multi-photon inequalities to properties of phase space distribution functions such as the diagonal coherent state distribution function and the Wigner function. Finally, the family of 4-mode states with Gaussian Wigner distributions is analysed, bringing out in this case the connection of violation of Bell type inequalities with the nonclassical property of squeezing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑