远程控制光场的量子统计性质

考虑双模纠缠相干光场,将其中一束光场注入腔中与一个二能级原子发生共振相互作用,总系统在腔量子电动力学演化过程中,对原子作选择性的测量,通过操纵参加相互作用的时间以及选择适当的光场参量可控制未参加相互作用光场的量子统计性质,在一定条件下可产生反聚束、压缩态等非经典光场,并且通过适当的控制和调整这些参量可以改变未参加相互作用光场的反聚束和压缩特性的强弱。这样,通过利用腔与原子之间简单的共振相互作用和相干光场之间的纠缠关联,实现了远程的、无直接量子测量的控制或改变相干光场的非经典性质这一目的。

Remote Control of Quantum Statistical Properties of Light Field

Considering two-mode entangled coherent light fields,one mode of the fields is poured into the cavity and interacts with a two-level atom.During the course of cavity-QED evolution of the total system,we have a selective measurement to the atom.Through manipulating the evolution time and the parameter of the coherent field which interacts with atom,we can control the quantum statistical property of the light fields outside of the cavity.In certain conditions,the non-classical light such as anti-bunching and squeezing state can be generated,also we can change the strength of anti-bunching and squeezing of the light fields without interaction through controlling and tunneling the parameters.In this way,by using the simple resonance interaction between cavity and atom and the entangled correlation between the coherent light fields,we have implemented the target,that is,control or change the non-classical properties of coherent light field remotely without indirect measurement.