Allevi Alessia, Bondani Maria
Department of Science and High Technology, University of Insubria, Via Valleggio 11, 22100, Como, Italy.
Institute for Photonics and Nanotechnologies, CNR, Via Valleggio 11, 22100, Como, Italy.
Sci Rep. 2017 Dec 1;7(1):16787. doi: 10.1038/s41598-017-16773-9.
We present the implementation of a compact setup for the generation of sub-Poissonian states of light exhibiting the analogous of antibunching behavior in the so-called mesoscopic intensity domain. In the scheme, the idler arm of a pulsed multi-mode twin-beam state is directly measured by a photon-number-resolving detector, whereas the signal arm is divided at a balanced beam splitter, at whose outputs other two photon-number-resolving detectors measure the number of photons. The three detectors measure synchronous with each laser pulse. Due to the nonclassical correlations in the twin beam, when a given value of photons is measured in the idler arm, the conditional states obtained in post processing at the two beam-splitter outputs are nonclassical, showing lower-than-one values of the Fano factor and of the photon autocorrelation coefficient. The possibility to engineer sub-Poissonian states nearly approaching the Fock state with one photon is also addressed.
我们展示了一种紧凑装置的实现，用于在所谓的介观强度域中产生呈现类似反聚束行为的亚泊松光态。在该方案中，脉冲多模双光束态的闲频臂由一个光子数分辨探测器直接测量，而信号臂在一个平衡分束器处被分割，在其输出端另外两个光子数分辨探测器测量光子数。这三个探测器与每个激光脉冲同步测量。由于双光束中的非经典相关性，当在闲频臂中测量到给定的光子值时，在分束器两个输出端后处理中获得的条件态是非经典的，显示出低于1的法诺因子和光子自相关系数值。还讨论了设计几乎接近单光子福克态的亚泊松态的可能性。
