证明在含有克尔介质的双光子J-C模型系统中通过对原子的测量可以制备“薛定谔猫态”。选择适当的测量时间、原子初态及非线性系数,即可产生偶相干态、奇相干态和Y-S相干态。进一步分析表明,正是由于克尔非线性介质的存在,该“薛定谔猫态”态才可能在n-m1条件下产生亚泊松光子分布。

We have proven that the Schrodinger cat states can be generated by conditional measurement on the atom in the Jaynes Cumming model with a Kerr like medium. The special states such as even coherent states, odd coherent state and Yurke Stoler coherent state may be aqcuired by further choosing some suitable parameters, such as the time of measurement, initial state of the atom, and Kerr nonlinear constant. The sub poisson distribution can be revealed under the high field approximation (n>>1) only in the existence of Kerr medium.