Achilles Daryl, Silberhorn Christine, Walmsley Ian A
Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX1 3PU, United Kingdom.
Phys Rev Lett. 2006 Jul 28;97(4):043602. doi: 10.1103/PhysRevLett.97.043602. Epub 2006 Jul 27.
We experimentally investigate a method of directly characterizing the photon-number distribution of nonclassical light beams that is tolerant to losses and makes use of only standard binary detectors. This is achieved in a single measurement by calibrating the detector using some small amount of prior information about the source. We demonstrate the technique on a freely propagating heralded two-photon-number state created by conditional detection of a two-mode squeezed state generated by parametric down-conversion.
我们通过实验研究了一种直接表征非经典光束光子数分布的方法，该方法能够容忍损耗且仅使用标准二元探测器。通过利用关于光源的少量先验信息对探测器进行校准，在单次测量中实现了这一点。我们在通过对参量下转换产生的双模压缩态进行条件探测而产生的自由传播的预告双光子数态上演示了该技术。
