Generation and distillation of non-Gaussian entanglement from nonclassical photon statistics

作者：Ivan J Solomon; Mukunda N; Simon R^*

来源：Quantum Information Processing, 2012, 11(3): 873-885.

DOI：10.1007/s11128-011-0316-0

• Partial transpose
• Non-Gaussian entanglement
• Distillation of entanglement
• Beam splitter
• Photon number distribution

With a product state of the form rho(in) = rho(a) circle times vertical bar 0 >(bb)< 0 vertical bar as input to a beam splitter, the output two-mode state rho(out) is shown to be negative under partial transpose (NPT) whenever the photon number distribution (PND) statistics {p(n(a))} associated with the possibly mixed state rho(a) of the input a-mode is antibunched or otherwise nonclassical, i.e., whenever {p(n(a))} fails to respect any one of an infinite sequence of necessary and sufficient classicality conditions. Negativity under partial transpose turns out to be a necessary and sufficient test for entanglement of rho(out) which is generically non-Gaussian. The output of a PND distribution is further shown to be distillable if any one of an infinite sequence of three term classicality conditions is violated.

• 出版日期2012-6