Probing superfluidity in a quasi two-dimensional Bose gas through its local dynamics
We report direct evidence of superfluidity in a quasi two-dimensional Bose gas by observing its dynamical response to a collective excitation, the scissors mode. Relying on a novel local average analysis, we are able to probe inhomogeneous clouds and reveal their local dynamics. We identify in this...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2016-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/18/6/062001 |
| _version_ | 1827873665818034176 |
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| author | Camilla De Rossi Romain Dubessy Karina Merloti Mathieu de Goër de Herve Thomas Badr Aurélien Perrin Laurent Longchambon Hélène Perrin |
| author_facet | Camilla De Rossi Romain Dubessy Karina Merloti Mathieu de Goër de Herve Thomas Badr Aurélien Perrin Laurent Longchambon Hélène Perrin |
| author_sort | Camilla De Rossi |
| collection | DOAJ |
| description | We report direct evidence of superfluidity in a quasi two-dimensional Bose gas by observing its dynamical response to a collective excitation, the scissors mode. Relying on a novel local average analysis, we are able to probe inhomogeneous clouds and reveal their local dynamics. We identify in this way the superfluid and thermal phases inside the gas and locate the boundary at which the Berezinskii–Kosterlitz–Thouless crossover occurs. This new analysis also allows to evidence the coupling of the two fluids which induces at finite temperatures damping rates larger than the usual Landau damping. |
| first_indexed | 2024-03-12T16:40:23Z |
| format | Article |
| id | doaj.art-4a50df010d5e464c984df19261921581 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:40:23Z |
| publishDate | 2016-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-4a50df010d5e464c984df192619215812023-08-08T14:31:32ZengIOP PublishingNew Journal of Physics1367-26302016-01-0118606200110.1088/1367-2630/18/6/062001Probing superfluidity in a quasi two-dimensional Bose gas through its local dynamicsCamilla De Rossi0Romain Dubessy1https://orcid.org/0000-0002-9448-2535Karina Merloti2Mathieu de Goër de Herve3Thomas Badr4Aurélien Perrin5https://orcid.org/0000-0001-5624-4133Laurent Longchambon6Hélène Perrin7Université Paris 13 , Sorbonne Paris Cité, Laboratoire de physique des lasers, F-93430, Villetaneuse, France; CNRS , UMR 7538, F-93430, Villetaneuse, FranceUniversité Paris 13 , Sorbonne Paris Cité, Laboratoire de physique des lasers, F-93430, Villetaneuse, France; CNRS , UMR 7538, F-93430, Villetaneuse, FranceUniversité Paris 13 , Sorbonne Paris Cité, Laboratoire de physique des lasers, F-93430, Villetaneuse, France; CNRS , UMR 7538, F-93430, Villetaneuse, FranceUniversité Paris 13 , Sorbonne Paris Cité, Laboratoire de physique des lasers, F-93430, Villetaneuse, France; CNRS , UMR 7538, F-93430, Villetaneuse, FranceUniversité Paris 13 , Sorbonne Paris Cité, Laboratoire de physique des lasers, F-93430, Villetaneuse, France; CNRS , UMR 7538, F-93430, Villetaneuse, FranceUniversité Paris 13 , Sorbonne Paris Cité, Laboratoire de physique des lasers, F-93430, Villetaneuse, France; CNRS , UMR 7538, F-93430, Villetaneuse, FranceUniversité Paris 13 , Sorbonne Paris Cité, Laboratoire de physique des lasers, F-93430, Villetaneuse, France; CNRS , UMR 7538, F-93430, Villetaneuse, FranceUniversité Paris 13 , Sorbonne Paris Cité, Laboratoire de physique des lasers, F-93430, Villetaneuse, France; CNRS , UMR 7538, F-93430, Villetaneuse, FranceWe report direct evidence of superfluidity in a quasi two-dimensional Bose gas by observing its dynamical response to a collective excitation, the scissors mode. Relying on a novel local average analysis, we are able to probe inhomogeneous clouds and reveal their local dynamics. We identify in this way the superfluid and thermal phases inside the gas and locate the boundary at which the Berezinskii–Kosterlitz–Thouless crossover occurs. This new analysis also allows to evidence the coupling of the two fluids which induces at finite temperatures damping rates larger than the usual Landau damping.https://doi.org/10.1088/1367-2630/18/6/062001quantum gasessuperfluiditytwo-dimensionalscissorshydrodynamics |
| spellingShingle | Camilla De Rossi Romain Dubessy Karina Merloti Mathieu de Goër de Herve Thomas Badr Aurélien Perrin Laurent Longchambon Hélène Perrin Probing superfluidity in a quasi two-dimensional Bose gas through its local dynamics New Journal of Physics quantum gases superfluidity two-dimensional scissors hydrodynamics |
| title | Probing superfluidity in a quasi two-dimensional Bose gas through its local dynamics |
| title_full | Probing superfluidity in a quasi two-dimensional Bose gas through its local dynamics |
| title_fullStr | Probing superfluidity in a quasi two-dimensional Bose gas through its local dynamics |
| title_full_unstemmed | Probing superfluidity in a quasi two-dimensional Bose gas through its local dynamics |
| title_short | Probing superfluidity in a quasi two-dimensional Bose gas through its local dynamics |
| title_sort | probing superfluidity in a quasi two dimensional bose gas through its local dynamics |
| topic | quantum gases superfluidity two-dimensional scissors hydrodynamics |
| url | https://doi.org/10.1088/1367-2630/18/6/062001 |
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