标题： 通过在分束器上进行条件测量制备薛定谔猫态 显示英文标题

标题： Schroedinger cat-like states by conditional measurements on a beam-splitter

摘要： 一种通过条件测量生成单模光场薛定谔猫态的方案被提出。 将压缩真空输入到分束器中，并计数输出通道之一中的光子，另一个输出通道中的条件态表现出与具有相反相位的两个相干态的叠加态非常相似的许多性质。 我们给出了条件态的光子数和正交分量分布以及它们的Wigner函数和Husimi函数的分析和数值结果。 此外，我们讨论了实际光子计数对这些态的影响。 显示英文摘要

摘要： A scheme for generating Schr\"{o}dinger cat-like states of a single-mode optical field by means of conditional measurement is proposed. Feeding into a beam splitter a squeezed vacuum and counting the photons in one of the output channels, the conditional states in the other output channel exhibit a number of properties that are very similar to those of superpositions of two coherent states with opposite phases. We present analytical and numerical results for the photon-number and quadrature-component distributions of the conditional states and their Wigner and Husimi functions. Further, we discuss the effect of realistic photocounting on the states.