三粒子体系中的Wigner-Yanse偏振信息

针对带有衰减机制的一轴模型和二轴模型,在薛定谔图象下, 研究了三粒子体系任意时刻的量子态及最大Wigner- Yanse偏振信息. 体系在非线性相互作用下, 体系的最大偏振信息始终出现在平面 内, 由于衰减的引入, 最大偏振信息能够被调节和存储. 对带有最大偏振信息极值 的GHZ态, 给出了其出现的条件.

Wigner-Yanse skew information of three-qubit system

The decay mechanism is considered in the one-axis twisting model and the two-countertwisting model for three-qubit system. Exact expression of the final states and the maximal Wigner-Yanse skew information(MSI) are given for different model within the Schrödinger picture. One can find that the MSI is always in the plane . Due to the decay mechanism and the nonlinear interaction, the MSI can be modulated and stored. We give the condition for occurrence of GHZ state, in which the MSI can reach the extreme values 9/4.