Anderson Localization of Composite Particles

Fumika Suzuki, Mikhail Lemeshko, Wojciech H. Zurek, and Roman V. Krems
Phys. Rev. Lett. 127, 160602 – Published 12 October 2021
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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.

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  • Received 17 November 2020
  • Revised 10 June 2021
  • Accepted 15 September 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.160602

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalGeneral PhysicsStatistical Physics & ThermodynamicsQuantum Information, Science & TechnologyCondensed Matter, Materials & Applied PhysicsInterdisciplinary Physics

Authors & Affiliations

Fumika Suzuki1,2,*, Mikhail Lemeshko1, Wojciech H. Zurek3, and Roman V. Krems2,4

  • 1IST Austria (Institute of Science and Technology Austria), Am Campus 1, 3400 Klosterneuburg, Austria
  • 2Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
  • 3Theory Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 4Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4

  • *fumika.suzuki@ist.ac.at

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Issue

Vol. 127, Iss. 16 — 15 October 2021

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