dorsal/arxiv
View SchemaJosephson effects in dilute Bose-Einstein condensates
| Authors | S. Giovanazzi, A. Smerzi, S. Fantoni |
|---|---|
| Categories | |
| ArXiv ID | physics/0002041 |
| URL | https://arxiv.org/abs/physics/0002041 |
| DOI | 10.1103/PhysRevLett.84.4521 |
Abstract
We propose an experiment that would demonstrate the ``dc'' and ``ac'' Josephson effects in two weakly linked Bose-Einstein condensates. We consider a time-dependent barrier, moving adiabatically across the trapping potential. The phase dynamics are governed by a ``driven-pendulum'' equation, as in current-driven superconducting Josephson junctions. At a critical velocity of the barrier (proportional to the critical tunneling current), there is a sharp transition between the ``dc'' and ``ac'' regimes. The signature is a sudden jump of a large fraction of the relative condensate population. Analytical predictions are compared with a full numerical solution of the time dependent Gross-Pitaevskii equation, in an experimentally realistic situation.
{
"annotation_id": "fc6aa85e-5612-407b-91d8-45b5bbb79619",
"date_created": "2026-03-02T18:00:28.701000Z",
"date_modified": "2026-03-02T18:00:28.701000Z",
"file_hash": "e4b50b432538eac52a6bab68fcf5390e573b135d929ac3bd2977433e64511baf",
"private": false,
"record": {
"abstract": "We propose an experiment that would demonstrate the ``dc\u0027\u0027 and ``ac\u0027\u0027\nJosephson effects in two weakly linked Bose-Einstein condensates. We consider a\ntime-dependent barrier, moving adiabatically across the trapping potential. The\nphase dynamics are governed by a ``driven-pendulum\u0027\u0027 equation, as in\ncurrent-driven superconducting Josephson junctions. At a critical velocity of\nthe barrier (proportional to the critical tunneling current), there is a sharp\ntransition between the ``dc\u0027\u0027 and ``ac\u0027\u0027 regimes. The signature is a sudden\njump of a large fraction of the relative condensate population. Analytical\npredictions are compared with a full numerical solution of the time dependent\nGross-Pitaevskii equation, in an experimentally realistic situation.",
"arxiv_id": "physics/0002041",
"authors": [
"S. Giovanazzi",
"A. Smerzi",
"S. Fantoni"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevLett.84.4521",
"title": "Josephson effects in dilute Bose-Einstein condensates",
"url": "https://arxiv.org/abs/physics/0002041"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "1ebd007e-d651-4cd8-9f1a-23f8656ee25e",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}