Data for the paper entitled "Parametric pair production of collective excitations in a Bose–Einstein condensate"
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| Lingua: | inglese |
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2026
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| author | Gondret, Victor Dias, Rui Lamirault, Clothilde Camier, Léa Micheli, Amaury Leprince, Charlie Marolleau, Quentin Robertson, Scott Boiron, Denis Westbrook, Christoph I. |
| author_facet | Gondret, Victor Dias, Rui Lamirault, Clothilde Camier, Léa Micheli, Amaury Leprince, Charlie Marolleau, Quentin Robertson, Scott Boiron, Denis Westbrook, Christoph I. |
| contents | <div lang="en"> <p><strong>Content: </strong>This repository contains the code which reproduces the figures of the paper [1]. All the raw data generated to produce the figures is not available online because files are too larges. However, they can be sent upon reasonable request (to CW and DB) as they are stored on the quantum gas server of Institut d'Optique, in the helium folder <code>helium/Publications/2025_Growth-Decay/Datasets</code>.</p> <p><strong>Method to use the repository: </strong>To run this code, you will need to install the heliumtools package, openly accessible on the <a href="https://github.com/quantumatomoptic/heliumtools">Github</a> or <a href="https://gitlab.in2p3.fr/gaz-quantiques-lcf/helium-1/heliumtools">Gitlab</a> page of the team. We recommand to create an environment and run the following </p> <pre><code>git clone git@gitlab.in2p3.fr:gaz-quantiques-lcf/helium-1/heliumtools.git cd heliumtools pip install .</code></pre> <p>I ran this notebook with python14 and it worked fine. To run the last figure, you will need <a href="https://docs.astropy.org/en/stable/install.html">astropy</a> (sorry). </p> <p><strong>Reference: </strong>[1] Victor Gondret; Rui Dias; Clothilde Lamirault; Léa Camier; Amaury Micheli; Charlie Leprince; Quentin Marolleau; Scott Robertson; Denis Boiron; Christoph I. Westbrook. Parametric pair production of collective excitations in a Bose–Einstein condensate. <a href="https://comptes-rendus.academie-sciences.fr/physique/item/10.5802/crphys.266.pdf">Comptes Rendus. Physique, <strong>25</strong> crphys.266 (2025).</a></p> <p><strong>Abstract of the paper</strong><strong>: </strong>By exciting the transverse breathing mode of an elongated Bose–Einstein condensate, we parametrically produce longitudinal collective excitations in a pairwise manner. This process, also referred to as Faraday wave generation, can be seen as an analog to cosmological particle production. Building upon single particle detection, we investigate the early time dynamics of the exponential growth and compare our observations with a Bogoliubov description. The growth rate we observe experimentally is in very good agreement with theoretical predictions, demonstrating the validity of the Bogoliubov description and thereby confirming the smallness of quasiparticle interactions in such an elongated gas. We also discuss the presence of oscillations in the atom number, which are due to pair correlations and to the rate at which interactions are switched off.</p> </div> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_18404430 |
| institution | Zenodo |
| language | eng |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Data for the paper entitled "Parametric pair production of collective excitations in a Bose–Einstein condensate" Gondret, Victor Dias, Rui Lamirault, Clothilde Camier, Léa Micheli, Amaury Leprince, Charlie Marolleau, Quentin Robertson, Scott Boiron, Denis Westbrook, Christoph I. <div lang="en"> <p><strong>Content: </strong>This repository contains the code which reproduces the figures of the paper [1]. All the raw data generated to produce the figures is not available online because files are too larges. However, they can be sent upon reasonable request (to CW and DB) as they are stored on the quantum gas server of Institut d'Optique, in the helium folder <code>helium/Publications/2025_Growth-Decay/Datasets</code>.</p> <p><strong>Method to use the repository: </strong>To run this code, you will need to install the heliumtools package, openly accessible on the <a href="https://github.com/quantumatomoptic/heliumtools">Github</a> or <a href="https://gitlab.in2p3.fr/gaz-quantiques-lcf/helium-1/heliumtools">Gitlab</a> page of the team. We recommand to create an environment and run the following </p> <pre><code>git clone git@gitlab.in2p3.fr:gaz-quantiques-lcf/helium-1/heliumtools.git cd heliumtools pip install .</code></pre> <p>I ran this notebook with python14 and it worked fine. To run the last figure, you will need <a href="https://docs.astropy.org/en/stable/install.html">astropy</a> (sorry). </p> <p><strong>Reference: </strong>[1] Victor Gondret; Rui Dias; Clothilde Lamirault; Léa Camier; Amaury Micheli; Charlie Leprince; Quentin Marolleau; Scott Robertson; Denis Boiron; Christoph I. Westbrook. Parametric pair production of collective excitations in a Bose–Einstein condensate. <a href="https://comptes-rendus.academie-sciences.fr/physique/item/10.5802/crphys.266.pdf">Comptes Rendus. Physique, <strong>25</strong> crphys.266 (2025).</a></p> <p><strong>Abstract of the paper</strong><strong>: </strong>By exciting the transverse breathing mode of an elongated Bose–Einstein condensate, we parametrically produce longitudinal collective excitations in a pairwise manner. This process, also referred to as Faraday wave generation, can be seen as an analog to cosmological particle production. Building upon single particle detection, we investigate the early time dynamics of the exponential growth and compare our observations with a Bogoliubov description. The growth rate we observe experimentally is in very good agreement with theoretical predictions, demonstrating the validity of the Bogoliubov description and thereby confirming the smallness of quasiparticle interactions in such an elongated gas. We also discuss the presence of oscillations in the atom number, which are due to pair correlations and to the rate at which interactions are switched off.</p> </div> |
| title | Data for the paper entitled "Parametric pair production of collective excitations in a Bose–Einstein condensate" |
| url | https://doi.org/10.5281/zenodo.18404430 |