Zobrazeno 1 - 10
of 252
pro vyhledávání: '"Labeyrie G"'
Publikováno v:
Journ{\'e}es de la SF2A, Jun 2024, Marseille, France
We present a preliminary laboratory test of a setup designed to measure Hanbury Brown and Twiss-type intensity correlations from a chaotic light source using five spectral channels simultaneously. After averaging the zero-delay correlation peaks from
Externí odkaz:
http://arxiv.org/abs/2411.08417
We report on the observation of spontaneously drifting coupled spin and quadrupolar density waves in the ground state of laser driven Rubidium atoms. These laser-cooled atomic ensembles exhibit spontaneous magnetism via light mediated interactions wh
Externí odkaz:
http://arxiv.org/abs/2310.17305
Publikováno v:
Phys. Rev. A 105, 013112 (2022)
Large clouds of atoms in a magneto-optical trap (MOT) are known to exhibit spatiotemporal instabilities when the frequency of the trapping lasers comes close to the atomic resonance. Such instabilities possess similarities with stars and confined pla
Externí odkaz:
http://arxiv.org/abs/2109.12942
Autor:
Ackemann, T., Labeyrie, G., Boquete, A. Costa, Baio, G., Walker, J. G. M., Kaiser, R., Oppo, G. -L., Robb, G. R. M.
Self-organized phases in cold atoms as a result of light-mediated interactions can be induced by coupling to internal or external degrees of the atoms. There has been growing interest in the interaction of internal spin degrees of freedom with the op
Externí odkaz:
http://arxiv.org/abs/2108.12064
Publikováno v:
Phys. Rev. A 104, 053714 (2021)
We theoretically explore the possibility to detect weak localization of light in a hot atomic vapor, where one usually expects the fast thermal motion of the atoms to destroy any interference in multiple scattering. To this end, we compute the cohere
Externí odkaz:
http://arxiv.org/abs/2107.03110
Publikováno v:
Phys. Rev. A 103, L041101 (2021)
Large clouds of cold atoms prepared in a magneto-optical trap are known to present spatiotemporal instabilities when the frequency of the trapping lasers is brought close to the atomic resonance. This system bears similarities with trapped plasmas wh
Externí odkaz:
http://arxiv.org/abs/2104.06881
Publikováno v:
MNRAS 480, 245-250 (2018)
The present articlereports on the first spatial intensity interferometry measurements on stars since the observations at Narrabri Observatory by Hanbury Brown et al. in the 1970's. Taking advantage of the progresses in recent years on photon-counting
Externí odkaz:
http://arxiv.org/abs/1805.06653
Autor:
Guerin, W., Dussaux, A., Fouché, M., Labeyrie, G., Rivet, J. -P., Vernet, D., Vakili, F., Kaiser, R.
Publikováno v:
MNRAS 472, 4126-4132 (2017)
We report the first intensity correlation measured with star light since Hanbury Brown and Twiss' historical experiments. The photon bunching $g^{(2)}(\tau, r=0)$, obtained in the photon counting regime, was measured for 3 bright stars, $\alpha$ Boo,
Externí odkaz:
http://arxiv.org/abs/1708.06119
Publikováno v:
Phys. Rev. A 96, 053806 (2017)
We study a pattern forming instability in a laser driven optically thick cloud of cold two-level atoms with a planar feedback mirror. A theoretical model is developed, enabling a full analysis of transverse patterns in a medium with saturable nonline
Externí odkaz:
http://arxiv.org/abs/1707.04090
Akademický článek
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