Effect of dark counts on single-photon heralding with quasi-number-resolving detection schemes.
Effect of dark counts on single-photon heralding with quasi-number-resolving detection schemes.
复制标题
暗计数对准数字分辨检测方案的单光子预示的影响。
作者：
L. Helt;M. J. Steel
我们考虑光子预示与准数字分辨检测方案，并考虑检测效率和暗计数概率。用一种简单的形式，我们开发了预示概率的封闭形式表达式，所得到的预示状态的光子数分布，以及该预示状态对单光子状态的保真度。我们计算出该保真度作为复用检测模式数量的函数具有最大值，并且对于对于相当多的检测模式达到最大值的实验配置，它仍然可以非常有利于复用较少的模式。
We consider photon heralding with quasi-number-resolving detection schemes and account for detection efficiencies and dark count probabilities. With a straightforward formalism, we develop closed-form expressions for the heralding probability, photon number distribution of the resulting heralded state, and fidelity of this heralded state to a single-photon state. We calculate that this fidelity has a maximum as a function of the number of multiplexed detection modes and that, for experimental configurations in which the maximum is reached for quite a large number of detection modes, it can still be highly beneficial to multiplex fewer modes.