Parametric pair production of collective excitations in a Bose-Einstein condensate
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909957350227968 |
|---|---|
| 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 | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_01654 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | 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. Quantum Gases General Relativity and Quantum Cosmology Pattern Formation and Solitons Quantum Physics 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. |
| title | Parametric pair production of collective excitations in a Bose-Einstein condensate |
| topic | Quantum Gases General Relativity and Quantum Cosmology Pattern Formation and Solitons Quantum Physics |
| url | https://arxiv.org/abs/2508.01654 |