Estimation of photon counting statistics with imperfect detectors<xref rid="cpb_27_7_074208fn1" ref-type="fn">*</xref><fn id="cpb_27_7_074208fn1"> <label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 61627820, 11674306, 61590932, and 61377048).</p></fn>

Estimation of photon counting statistics with imperfect detectors* *

Project supported by the National Natural Science Foundation of China (Grant Nos. 61627820, 11674306, 61590932, and 61377048).

Han Xiao-Chuan¹, Zhuang Dong-Wei¹, Li Yu-Xuan¹, Song Jun-Feng^{1, †}, Zhang Yong-Sheng^{2, ‡}

(color online) Schematic of multiphoton detections based on an on/off detector array. An unknown quantum state is equally divided into N ports by a series of hypothetical unitary operations (U(N)). At the end of each port, an on/off detector is ready for the detection of a possible incoming photon. The photon number distribution is obtained by summing the clicks of all the on/off detectors.