Asymmetric tunneling of Bose-Einstein condensates

verfasst von
Dustin R. Lindberg, Naceur Gaaloul, Lev Kaplan, Jason R. Williams, Dennis Schlippert, Patrick Boegel, Ernst Maria Rasel, Denys I. Bondar
Abstract

In his celebrated textbook, Quantum Mechanics: Nonrelativistic Theory, Landau argued that, for single particle systems in 1D, tunneling probability remains the same for a particle incident from the left or the right of a barrier. This left-right symmetry of tunneling probability holds regardless of the shape of the potential barrier. However, there are a variety of known cases that break this symmetry, e.g. when observing composite particles. We computationally (and analytically, in the simplest case) show this breaking of the left-right tunneling symmetry for Bose-Einstein condensates (BECs) in 1D, modeled by the Gross-Pitaevskii equation. By varying g, the parameter of inter-particle interaction in the BEC, we demonstrate that the transition from symmetric (g = 0) to asymmetric tunneling is a threshold phenomenon. Our computations employ experimentally feasible parameters such that these results may be experimentally demonstrated in the near future. We conclude by suggesting applications of the phenomena to design atomtronic diodes, synthetic gauge fields, Maxwell’s demons, and black-hole analogues.

Organisationseinheit(en)
Institut für Quantenoptik
QuantumFrontiers
SFB 1227: Designte Quantenzustände der Materie (DQ-mat)
Externe Organisation(en)
Tulane University
California Institute of Technology
Universität Ulm
Typ
Artikel
Journal
Journal of Physics B: Atomic, Molecular and Optical Physics
Band
56
ISSN
0953-4075
Publikationsdatum
18.01.2023
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Atom- und Molekularphysik sowie Optik, Physik der kondensierten Materie
Elektronische Version(en)
https://doi.org/10.48550/arXiv.2110.15298 (Zugang: Offen)
https://doi.org/10.1088/1361-6455/acae50 (Zugang: Geschlossen)