摘要:
解析推导了任意光子扣除（增加）压缩真空态与压缩猫态的保真度.研究表明,无论是光子增加还是光子扣除,最大保真度都随光子增加或扣除数目的增加而增加,且最大保真度对应的叠加态振幅也增加;此外,对于相同数目的增加和扣除光子数,光子增加后的最大保真度所对应的叠加态振幅比光子扣除所对应的叠加态振幅要大,而最大保真度略小一些.尽管目前从实验上实现光子增加比光子扣除困难较大,但光子增加也可以成为获得大振幅猫态的一个有力手段.
Abstract:
In this paper,the fidelity of photon subtracted（or added） squeezed vacuum state with arbitrary number of photons and squeezed cat state is derived analytically.The result shows that whether the photon is added or subtracted,the maximum fidelity increases with the increase of the change of photon number,and the amplitude of the superposition state corresponding to the maximum fidelity also increases.In addition,for the same number of subtracted or added photons,the amplitude of the superposition state corresponding to the maximum fidelity in the case of added photon is larger than in the case of subtracted photon,but the maximum fidelity in the case is smaller.Although it is more difficult to make photon added than photon subtracted the photon added can be used as an important method to obtain cat state of large amplitude.
首页
登录
注册
下载: