论文标题
复合颗粒的安德森本地化
Anderson localization of composite particles
论文作者
论文摘要
我们研究了复合量子颗粒自由度之间的耦合对它们的定位，其耦合在随机电位中的定位。我们表明，由于量子状态的纯度对逆参与率施加的上限，两种自由度之间的纠缠削弱了定位。我们对在1D无序的晶格中由谐波力和2D无序晶格中的刚性转子绑定的两粒子系统执行数值计算。我们说明耦合对定位属性具有巨大影响，即使少数内部状态参与量子动力学。
We investigate the effect of coupling between translational and internal degrees of freedom of composite quantum particles on their localization in a random potential. We show that entanglement between the two degrees of freedom weakens localization due to the upper bound imposed on the inverse participation ratio by purity of a quantum state. We perform numerical calculations for a two-particle system bound by a harmonic force in a 1D disordered lattice and a rigid rotor in a 2D disordered lattice. We illustrate that the coupling has a dramatic effect on localization properties, even with a small number of internal states participating in quantum dynamics.
