학술논문
Anderson localization of composite particles
Document Type
Working Paper
Source
Phys. Rev. Lett. 127, 160602 (2021)
Subject
Language
Abstract
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.
Comment: 9 pages, 6 figures
Comment: 9 pages, 6 figures