论文标题
冯·诺伊曼（Von Neumann）的熵
Von Neumann entropy in a dispersive cavity
论文作者
论文摘要
我们研究了分散腔中两个两级原子（Qubits）系统的部分痕迹的von Neumann熵，在该腔体中，原子与腔中的单个模式电磁场共同相互作用。我们将这种纠缠熵与系统的自旋挤压特性形成鲜明对比。我们发现这个von Neumann熵与系统的自旋挤压之间有着密切的关系。我们观察到，当系统中的旋转挤压达到最大值时，当系统中的旋转挤压在系统中时为零时，这种纠缠熵达到了最大值。
We study the von Neumann entropy of the partial trace of a system of two two-level atoms (qubits) in a dispersive cavity where the atoms are interacting collectively with a single mode electromagnetic field in the cavity. We make a contrast of this entanglement entropy with the spin squeezing property of the system. We find a close relationship between this von Neumann entropy and the spin squeezing of the system. We observe that this entanglement entropy attains its maximum value when the spin squeezing in the system goes to its maximum and is zero when the spin squeezing in the system vanishes.
