提出了重构腔场Wigner函数的一种新方案。该方案可以用微脉塞来实现。发现在腔场的Wigner函数与原子的布居数之间存在一个简单的关系。在实验上测得原子的布居数后，进行一个简单的数值积分，就可得到腔场的Wigner函数。以单光子Fock态和SchrÊdinger猫态为例进行了数值模拟，发现与用精确公式计算的结果很好地相符。

提出一种基于交叉尔非线性效应的纠缠态转移方案。利用该方案可以将离散变量光场态之间的纠缠关系转移到连续变量光场态（相干态）上。通过适当设置初始相干态的振幅，该方案可以使转移后的纠缠相干态处于最大纠缠态。

We propose a scheme for measuring the Wigner function of a two-mode cavity field. The scheme bases on the interaction between the two-mode cavity field and three level atoms. We find a simple relation between the Wigner function and the atomic population. One can obtain the Wigner function by measuring the atomic population with a micromaser-like experiment and doing a numerical integral. By using the two-mode Wigner function one can obtain the Clauser-Horne combination and test the Bell's inequalities. We test our equations with a two-mode entanglement state and the results are rather good.

We have studied squeezing of the field in the N-photon interaction of two two-Level atoms with the radiation field initially in a squeezed state.

We propose a scheme to realize 1→2 universal quantum cloning machine (UQCM) with su-perconducting quantum interference device (SQUID) qubits, embeded in a high-Q cavity. CNOT operations are derived to present our scheme, and the two-photon Raman resonance processes are used to increase the operation rate. Compared with previous works, our scheme has advantages in the experimental realization and further utilization.