标题： 单个光子的减法如何影响多个量子模式 显示英文标题

标题： How subtraction of a single photon affects many quantum modes

摘要： 从多模量子场中减去一个光子被分析为开放量子系统条件演化的一种情况。 我们发展了一种理论，以统一的方法描述不同的减去方案，并引入了与该过程固有的减去模式的概念。 减去模式与场的模式之间的匹配定义了光子减去的不同可能情景。 特别是，我们的框架识别了：纯光子减去的条件，光子减去条件下场模的量子态，当在多模压缩光上进行减去时与单光子态具有最高保真度的模式。 我们利用该理论分析从高度多模的量子资源——一列量子压缩或相关光学脉冲中减去光子。 在各种多模光场上最优地进行光子减去有可能以复用和可扩展的方式实现多种量子信息协议。 显示英文摘要

摘要： The subtraction of a single photon from a multimode quantum field is analyzed as the conditional evolution of an open quantum system. We develop a theory describing different subtraction schemes in a unified approach and we introduce the concept of subtraction modes intrinsic to the process. The matching between the subtraction modes and the modes of the field defines different possible scenarios for the photon subtraction. In particular, our framework identifies: the conditions of pure photon subtraction, the quantum states of the field modes conditioned to the photon subtraction, the mode with the highest fidelity with a single-photon state when the subtraction is performed on multimode squeezed light. We use our theory to analyze the photon subtraction from a highly multimode quantum resource - a train of quantum squeezed or correlated optical pulses. Performing the photon subtraction optimally on various multimode light field has the potential to implement a number of quantum information protocols in a multiplexed and scalable way.