Anderson localization of composite particles
Quantum Physics
2021-10-13 v2 Disordered Systems and Neural Networks
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.
Cite
@article{arxiv.2011.06279,
title = {Anderson localization of composite particles},
author = {Fumika Suzuki and Mikhail Lemeshko and Wojciech H. Zurek and Roman V. Krems},
journal= {arXiv preprint arXiv:2011.06279},
year = {2021}
}
Comments
9 pages, 6 figures