Efficient numerical description of the dynamics of interacting multispecies quantum gases

authored by
Annie Pichery, Matthias Meister, Baptist Piest, Jonas Böhm, Ernst Maria Rasel, Eric Charron, Naceur Gaaloul
Abstract

We present a highly efficient method for the numerical solution of coupled Gross-Pitaevskii equations describing the evolution dynamics of a multi-species mixture of Bose-Einstein condensates in time-dependent potentials. This method, based on a moving and expanding reference frame, compares favorably to a more standard but much more computationally expensive solution based on a frozen frame. It allows an accurate description of the long-time behavior of interacting, multi-species quantum mixtures including the challenging problem of long free expansions relevant to microgravity and space experiments. We demonstrate a successful comparison to experimental measurements of a binary Rb-K mixture recently performed with the payload of a sounding rocket experiment.

Organisation(s)
Institute of Quantum Optics
QuantumFrontiers
External Organisation(s)
Universite Paris-Sud XI
German Aerospace Center (DLR)
Type
Article
Journal
AVS Quantum Science
Volume
5
No. of pages
16
Publication date
12.2023
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Computer Networks and Communications, Physical and Theoretical Chemistry, Computational Theory and Mathematics, Electrical and Electronic Engineering
Electronic version(s)
https://doi.org/10.48550/arXiv.2305.13433 (Access: Open)
https://doi.org/10.1116/5.0163850 (Access: Open)