Reversing the persistent current of particles in a driven optical ring lattice

L. Morales-Molina and E. Arévalo
Phys. Rev. A 92, 043625 – Published 27 October 2015

Abstract

We study the dynamics of persistent bosonic currents in closed-loop atom circuits in the form of ring lattices and under the action of time periodic driving. The closed-loop atom circuits are described by a Bose-Hubbard model in the presence of a Peierls phase and with periodic boundary conditions. We find that the motion of matter waves can be controlled with the help of an external driving only applied in one site of the ring lattice. For tuned values of the interaction strength between particles, we show that there exists a frequency range of the external driving where not only suppression but also reversion of the persistent bosonic currents is achieved. Applications of our results are discussed.

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  • Received 11 August 2015

DOI:https://doi.org/10.1103/PhysRevA.92.043625

©2015 American Physical Society

Authors & Affiliations

L. Morales-Molina and E. Arévalo

  • Instituto de Física, Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile

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Issue

Vol. 92, Iss. 4 — October 2015

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