2026-06-08T01:03:13Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/336242024-09-03T15:18:48Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Heimsoth, Martin
author
Hochstuhl, D.
author
Creffield, Charles
author
Carr, L.D.
author
Sols Lucía, Fernando
2023-06-19T13:25:11Z
2023-06-19T13:25:11Z
2013-10-07
1367-2630
10.1088/1367-2630/15/10/103006
https://hdl.handle.net/20.500.14352/33624
http://dx.doi.org/10.1088/1367-2630/15/10/103006
http://iopscience.iop.org
We show that the orbital Josephson effect appears in a wide range of driven atomic Bose-Einstein condensed systems, including quantum ratchets, double wells and box potentials. We use three separate numerical methods: the Gross-Pitaevskii equation, exact diagonalization of the few-mode problem and the multi-configurational time-dependent Hartree for bosons algorithm. We establish the limits of mean-field and few-mode descriptions, demonstrating that the few-mode approximation represents the full many-body dynamics to high accuracy in the weak driving limit. Among other quantum measures, we compute the instantaneous particle current and the occupation of natural orbitals. We explore four separate dynamical regimes, the Rabi limit, chaos, the critical point and self-trapping; a favorable comparison is found even in the regimes of dynamical instabilities or macroscopic quantum self-trapping. Finally, we present an extension of the (t, t')-formalism to general time-periodic equations of motion, which permits a systematic description of the long-time dynamics of resonantly driven many-body systems, including those relevant to the orbital Josephson effect.
eng
Atribución 3.0 España
Effective Josephson dynamics in resonantly driven Bose-Einstein condensates
journal article
URL
https://docta.ucm.es/bitstreams/fb0b77e1-290a-4e10-bfaf-8bcc86e1b8e9/download
File
MD5
506e77d4a37c8b2fe3f73a1fcf862c44
710791
application/pdf
Sols, F 05libre.pdf