Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Romain Dubessy"'
Autor:
Ignacio Reyes-Ayala, Marcos Miotti, Michal Hemmerling, Romain Dubessy, Hélène Perrin, Victor Romero-Rochin, Vanderlei Salvador Bagnato
Publikováno v:
Entropy, Vol 25, Iss 2, p 311 (2023)
Carnot cycles of samples of harmonically confined ultracold 87Rb fluids, near and across Bose–Einstein condensation (BEC), are analyzed. This is achieved through the experimental determination of the corresponding equation of state in terms of the
Externí odkaz:
https://doaj.org/article/25b113c03d8843ff9e9652dabea2e4bf
Autor:
Yanliang Guo, Emmanuel Mercado Gutierrez, David Rey, Thomas Badr, Aurélien Perrin, Laurent Longchambon, Vanderlei Salvador Bagnato, Hélène Perrin, Romain Dubessy
Publikováno v:
New Journal of Physics, Vol 24, Iss 9, p 093040 (2022)
We report the observation of the controlled expansion of a two-dimensional (2D) quantum gas confined onto a curved shell-shaped surface. We start from the ellipsoidal geometry of a dressed quadrupole trap and introduce a novel gravity compensation me
Externí odkaz:
https://doaj.org/article/8465486dd48c4aa1b44dc23de6af7ff4
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p 013098 (2021)
We propose a protocol for creating moving, robust dispersive shock waves in interacting one-dimensional Bose fluids. The fluid is prepared in a moving state by phase imprinting and sent against the walls of a box trap. We demonstrate that the thus fo
Externí odkaz:
https://doaj.org/article/694a11c72b3b4d9d8be1a16f3e896b8c
Autor:
Camilla De Rossi, Romain Dubessy, Karina Merloti, Mathieu de Goër de Herve, Thomas Badr, Aurélien Perrin, Laurent Longchambon, Hélène Perrin
Publikováno v:
New Journal of Physics, Vol 18, Iss 6, p 062001 (2016)
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
Externí odkaz:
https://doaj.org/article/4a50df010d5e464c984df19261921581
Publikováno v:
New Journal of Physics, Vol 16, Iss 12, p 122001 (2014)
Advanced data analysis techniques have proved to be crucial for extracting information from noisy images. Here we show that principal component analysis can be successfully applied to ultracold gases to unveil their collective excitations. By analyzi
Externí odkaz:
https://doaj.org/article/200806820ae34613b0d531ff1d38f8d3
Autor:
David Rey, Simon Thomas, Rishabh Sharma, Thomas Badr, Laurent Longchambon, Romain Dubessy, Hélène Perrin
Starting from a degenerate Bose gas in an hybrid trap combining a magnetic quadrupole trap and an attractive optical trap resulting from a focused laser beam, we demonstrate the efficient loading of this quantum gas into a shell-shaped trap. The shel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fadd52d6056931a43b5252dfbcc00a46
Autor:
Romain Dubessy, Abhik Kumar Saha
Publikováno v:
Physical Review A
Physical Review A, American Physical Society, 2021, 104, pp.023316
Physical Review A, American Physical Society, 2021, 104, pp.023316
International audience; We study the dynamics of one-dimensional bosons trapped in a box potential, in the presence of a barrier creating a tunable weak-link, thus realizing a one dimensional Bose Josephson junction. By varying the initial population
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4fe4560b82f1ddf37d6388e981a02a4b
https://hal.archives-ouvertes.fr/hal-03201469v2/file/main.pdf
https://hal.archives-ouvertes.fr/hal-03201469v2/file/main.pdf
Autor:
Mathieu de Goër de Herve, Thomas Badr, Camilla De Rossi, Avinash Kumar, Laurent Longchambon, Hélène Perrin, Yanliang Guo, Romain Dubessy
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 2021
Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 2021
International audience; We report on the confinement of a Bose-Einstein condensate in an annular trap with widely tunable parameters. The trap relies on a combination of magnetic, optical and radio-frequency fields. The loading procedure is discussed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f4d7f480466b21df1e278723e27b415
https://hal.archives-ouvertes.fr/hal-03181695v2/file/deGoer.pdf
https://hal.archives-ouvertes.fr/hal-03181695v2/file/deGoer.pdf
Autor:
Yanliang Guo, Emmanuel Mercado Gutierrez, David Rey, Thomas Badr, Aurélien Perrin, Laurent Longchambon, Vanderlei Salvador Bagnato, Hélène Perrin, Romain Dubessy
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
We report the observation of the controlled expansion of a two-dimensional quantum gas confined onto a curved shell-shaped surface. We start from the ellipsoidal geometry of a dressed quadrupole trap and introduce a novel gravity compensation mechani
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bd6bca6a949c1ce40b18db2f7db5ecd
http://arxiv.org/abs/2105.12981
http://arxiv.org/abs/2105.12981
Autor:
Romain Dubessy, Hélène Perrin, Laurent Longchambon, Yanliang Guo, Aurélien Perrin, Mathieu de Goër de Herve, Avinash Kumar, Thomas Badr
Publikováno v:
Physical Review Letters
Physical Review Letters, American Physical Society, 2020, 124 (2), ⟨10.1103/PhysRevLett.124.025301⟩
Physical Review Letters, American Physical Society, 2020, 124 (2), ⟨10.1103/PhysRevLett.124.025301⟩
We present the experimental realization of a long-lived superfluid flow of a quantum gas rotating in an anharmonic potential, sustained by its own angular momentum. The gas is set into motion by rotating an elliptical deformation of the trap. An evap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3533b44ba9d78e0431efd8099661be25
https://doi.org/10.1103/physrevlett.124.025301
https://doi.org/10.1103/physrevlett.124.025301