标题： 多光子量子态工程利用条件测量 显示英文标题

标题： Multiphoton Quantum-State Engineering using Conditional Measurements

摘要： 量子电磁辐射理论预测了各种光源（如阳光、激光辐射和分子荧光）的特征统计涨落。 确实，这些光的底层统计涨落与它们产生的基本物理过程相关。 在本研究中，我们展示了对一对真空态的量子电磁涨落进行操控，可以产生具有可调平均光子数和相关度的新一类量子关联多光子态。 我们的技术依赖于条件测量的使用，通过同时从双模压缩真空态中减去光子来设计场的激发模式。 通过光子减法生成具有量子关联的多光子态，揭示了控制光的基本性质的新机制。 作为一个显著的例子，我们演示了光的量子关联态的工程化，其光子统计接近泊松分布，这是生成纠缠激光器的第一步。 我们的技术 enables 一种稳健的协议，在高维空间中制备多个光子的量子态，因此它构成了探索介观系统中量子现象的新平台。 显示英文摘要

摘要： The quantum theory of electromagnetic radiation predicts characteristic statistical fluctuations for light sources as diverse as sunlight, laser radiation and molecule fluorescence. Indeed, these underlying statistical fluctuations of light are associated with the fundamental physical processes behind their generation. In this contribution, we demonstrate that the manipulation of the quantum electromagnetic fluctuations of a pair of vacuum states leads to a novel family of quantum-correlated multiphoton states with tunable mean photon numbers and degree of correlation. Our technique relies on the use of conditional measurements to engineer the excitation mode of the field through the simultaneous subtraction of photons from two-mode squeezed vacuum states. The experimental generation of multiphoton states with quantum correlations by means of photon subtraction unveils novel mechanisms to control fundamental properties of light. As a remarkable example, we demonstrate the engineering of a quantum correlated state of light, with nearly Poissonian photon statistics, that constitutes the first step towards the generation of entangled lasers. Our technique enables a robust protocol to prepare quantum states with multiple photons in high-dimensional spaces and, as such, it constitutes a novel platform for exploring quantum phenomena in mesoscopic systems.