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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Quantum entanglement of bound particles under free center of mass dispersion
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Quantum entanglement of bound particles under free center of mass dispersion

机译：自由质心分散中心下结合粒子的量子纠缠

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摘要

On the basis of the full analytical solution of the overall unitary dynamics, the time evolution of entanglement is studied in a simple bipartite model system evolving unitarily from a pure initial state. The system consists of two particles in one spatial dimension bound by harmonic forces and having its free center of mass initially localized in space in a minimum uncertainty wavepacket. The existence of such initial states in which the bound particles are not entangled is discussed. Galilean invariance of the system ensures that the dynamics of entanglement between the two particles is independent of the wavepacket mean momentum. In fact, as shown, it is driven by the dispersive center of mass free dynamics, and evolves in a time scale that depends on the interparticle interaction in an essential way.
机译：在整体unit动力学的完整解析解的基础上，研究了一个简单的二元模型系统从纯初始状态演化而来的纠缠时间演化。该系统由一个空间维度上的两个粒子组成，这些粒子由谐波力限制，其自由质心最初位于最小不确定性波包中的空间中。讨论了这样的初始状态的存在，其中结合的粒子没有纠缠。系统的伽利略不变性确保了两个粒子之间的纠缠动力学与波包平均动量无关。实际上，如图所示，它是由无质量动力学的分散中心驱动的，并且在一定程度上取决于粒子间的交互作用。

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