Anderson Localization of Composite Particles
- 12 October 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 127 (16), 160602
- https://doi.org/10.1103/physrevlett.127.160602
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.Keywords
Funding Information
- H2020 Marie Sklodowska-Curie Actions (754411)
- European Research Council (801770)
- U.S. Department of Energy
- Los Alamos National Laboratory
- Office of Science
- Basic Energy Sciences
- Division of Materials Sciences and Engineering
- Natural Sciences and Engineering Research Council of Canada
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