Quantum simulation of expanding space–time with tunnel-coupled condensates
We consider two weakly interacting quasi-1D condensates of cold bosonic atoms. It turns out that a time-dependent variation of the tunnel-coupling between those condensates is equivalent to the spatial expansion of a one-dimensional toy-Universe, with regard to the dynamics of the relative phase fie...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/17/12/125007 |
| _version_ | 1797751014404653056 |
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| author | Clemens Neuenhahn Florian Marquardt |
| author_facet | Clemens Neuenhahn Florian Marquardt |
| author_sort | Clemens Neuenhahn |
| collection | DOAJ |
| description | We consider two weakly interacting quasi-1D condensates of cold bosonic atoms. It turns out that a time-dependent variation of the tunnel-coupling between those condensates is equivalent to the spatial expansion of a one-dimensional toy-Universe, with regard to the dynamics of the relative phase field. The dynamics of this field is governed by the quantum sine-Gordon equation. Thus, this analogy could be used to ‘quantum simulate’ the dynamics of a scalar, interacting quantum field on an expanding background. We discuss how to observe the ‘freezing’ of quantum fluctuations during an accelerating expansion in a possible experiment. We also analyze an experimental protocol to study the formation of sine-Gordon breathers in the relative phase field, seeded by quantum fluctuations. |
| first_indexed | 2024-03-12T16:42:12Z |
| format | Article |
| id | doaj.art-1e5c90f1c60e4e1fb72305e634a94c61 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:42:12Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-1e5c90f1c60e4e1fb72305e634a94c612023-08-08T14:24:04ZengIOP PublishingNew Journal of Physics1367-26302015-01-01171212500710.1088/1367-2630/17/12/125007Quantum simulation of expanding space–time with tunnel-coupled condensatesClemens Neuenhahn0Florian Marquardt1https://orcid.org/0000-0003-4566-1753Friedrich-Alexander-Universität Erlangen-Nürnberg , Institute for Theoretical Physics II, Staudtstr.7, D-91058 Erlangen, GermanyFriedrich-Alexander-Universität Erlangen-Nürnberg , Institute for Theoretical Physics II, Staudtstr.7, D-91058 Erlangen, GermanyWe consider two weakly interacting quasi-1D condensates of cold bosonic atoms. It turns out that a time-dependent variation of the tunnel-coupling between those condensates is equivalent to the spatial expansion of a one-dimensional toy-Universe, with regard to the dynamics of the relative phase field. The dynamics of this field is governed by the quantum sine-Gordon equation. Thus, this analogy could be used to ‘quantum simulate’ the dynamics of a scalar, interacting quantum field on an expanding background. We discuss how to observe the ‘freezing’ of quantum fluctuations during an accelerating expansion in a possible experiment. We also analyze an experimental protocol to study the formation of sine-Gordon breathers in the relative phase field, seeded by quantum fluctuations.https://doi.org/10.1088/1367-2630/17/12/125007cold atomsquantum simulationquenchesnonequilibrium physics |
| spellingShingle | Clemens Neuenhahn Florian Marquardt Quantum simulation of expanding space–time with tunnel-coupled condensates New Journal of Physics cold atoms quantum simulation quenches nonequilibrium physics |
| title | Quantum simulation of expanding space–time with tunnel-coupled condensates |
| title_full | Quantum simulation of expanding space–time with tunnel-coupled condensates |
| title_fullStr | Quantum simulation of expanding space–time with tunnel-coupled condensates |
| title_full_unstemmed | Quantum simulation of expanding space–time with tunnel-coupled condensates |
| title_short | Quantum simulation of expanding space–time with tunnel-coupled condensates |
| title_sort | quantum simulation of expanding space time with tunnel coupled condensates |
| topic | cold atoms quantum simulation quenches nonequilibrium physics |
| url | https://doi.org/10.1088/1367-2630/17/12/125007 |
| work_keys_str_mv | AT clemensneuenhahn quantumsimulationofexpandingspacetimewithtunnelcoupledcondensates AT florianmarquardt quantumsimulationofexpandingspacetimewithtunnelcoupledcondensates |