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Collective excitation dynamics of a cold atom cloud

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Author(s):
do Espirito Santo, T. S. ; Weiss, P. ; Cipris, A. ; Kaiser, R. ; Guerin, W. ; Bachelard, R. ; Schachenmayer, J.
Total Authors: 7
Document type: Journal article
Source: PHYSICAL REVIEW A; v. 101, n. 1, p. 10-pg., 2020-01-14.
Abstract

We study experimentally and theoretically the time-dependent response of a cold atom cloud illuminated by a laser beam immediately after the light is switched on. We show that cooperative effects, which have been previously investigated in the decay dynamics after the laser is switched off, also give rise to characteristic features in this configuration. In particular, we show that collective Rabi oscillations exhibit a superradiant damping. We first consider an experiment that is performed in the linear-optics regime and is well described by a linear coupled-dipole theory. We then show that this linear-optics model breaks down when increasing the saturation parameter, and that the experimental results are then well described by a nonlinear mean-field theory. (AU)

FAPESP's process: 17/10294-2 - Blockade effects with light-mediated dipole-dipole interactions
Grantee:Tiago Santiago do Espirito Santo
Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
FAPESP's process: 19/02071-9 - Beyond the linear optics limit: quantum effects in a ultracold dilute cloud
Grantee:Tiago Santiago do Espirito Santo
Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
FAPESP's process: 13/07375-0 - CeMEAI - Center for Mathematical Sciences Applied to Industry
Grantee:Francisco Louzada Neto
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 18/15554-5 - Transport and localization of light in two and three dimensions
Grantee:Romain Pierre Marcel Bachelard
Support Opportunities: Research Grants - Young Investigators Grants - Phase 2
FAPESP's process: 18/01447-2 - Correlations of the light scattered by atomic clouds
Grantee:Romain Pierre Marcel Bachelard
Support Opportunities: Scholarships abroad - Research