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Collective resonance fluorescence in small and dense atom clouds: Comparison between theory and experiment

Collective resonance fluorescence in small and dense atom clouds: Comparison between theory and experiment
Collective resonance fluorescence in small and dense atom clouds: Comparison between theory and experiment
We study the emergence of a collective optical response of a cold and dense Rb87 atomic cloud to a near-resonant low-intensity light when the atom number is gradually increased. Experimental observations are compared with microscopic stochastic simulations of recurrent scattering processes between the atoms that incorporate the atomic multilevel structure and the optical measurement setup. We analyze the optical response of an inhomogeneously broadened gas and find that the experimental observations of the resonance line shifts and the total collected scattered light intensity in cold atom clouds substantially deviate from those of thermal atomic ensembles, indicating strong light-induced resonant dipole-dipole interactions between the atoms. At high densities, the simulations also predict a significantly slower decay of light-induced excitations in cold than in thermal atom clouds. The role of dipole-dipole interactions is discussed in terms of resonant coupling examples and the collective radiative excitation eigenmodes of the system.
1050-2947
1-15
Jenkins, S.D.
65d861fb-b85a-4927-805a-7c906fca26c6
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Javanainen, J.
10bc75aa-ad97-421b-8434-0b9e9a502318
Jennewein, S.
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Bourgain, R.
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Pellegrino, J.
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Sortais, Y.R.P.
6893a516-e600-43fc-80ab-7f7c7710275b
Browaeys, A.
db134975-b03c-4ee0-bb0f-5465c920f414
Jenkins, S.D.
65d861fb-b85a-4927-805a-7c906fca26c6
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Javanainen, J.
10bc75aa-ad97-421b-8434-0b9e9a502318
Jennewein, S.
50f4cb12-c653-48c6-af73-b8ba539ece45
Bourgain, R.
7b29a824-01d5-470f-b594-c39581eb91c6
Pellegrino, J.
78cab079-843d-4df4-8cd5-d12a32baac33
Sortais, Y.R.P.
6893a516-e600-43fc-80ab-7f7c7710275b
Browaeys, A.
db134975-b03c-4ee0-bb0f-5465c920f414

Jenkins, S.D., Ruostekoski, J., Javanainen, J., Jennewein, S., Bourgain, R., Pellegrino, J., Sortais, Y.R.P. and Browaeys, A. (2016) Collective resonance fluorescence in small and dense atom clouds: Comparison between theory and experiment. Physical Review A, 94 (2), 1-15. (doi:10.1103/PhysRevA.94.023842).

Record type: Article

Abstract

We study the emergence of a collective optical response of a cold and dense Rb87 atomic cloud to a near-resonant low-intensity light when the atom number is gradually increased. Experimental observations are compared with microscopic stochastic simulations of recurrent scattering processes between the atoms that incorporate the atomic multilevel structure and the optical measurement setup. We analyze the optical response of an inhomogeneously broadened gas and find that the experimental observations of the resonance line shifts and the total collected scattered light intensity in cold atom clouds substantially deviate from those of thermal atomic ensembles, indicating strong light-induced resonant dipole-dipole interactions between the atoms. At high densities, the simulations also predict a significantly slower decay of light-induced excitations in cold than in thermal atom clouds. The role of dipole-dipole interactions is discussed in terms of resonant coupling examples and the collective radiative excitation eigenmodes of the system.

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Accepted/In Press date: 2 August 2016
e-pub ahead of print date: 24 August 2016
Published date: 24 August 2016
Additional Information: Funded by EPSRC: Quantum Technology Hub for Sensors and Metrology (EP/M013294/1)
Organisations: Applied Mathematics

Identifiers

Local EPrints ID: 399751
URI: http://eprints.soton.ac.uk/id/eprint/399751
ISSN: 1050-2947
PURE UUID: afe6fd2f-f2db-4bfb-a35c-1518e0a472aa

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Date deposited: 26 Aug 2016 11:17
Last modified: 25 Nov 2021 22:09

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Contributors

Author: S.D. Jenkins
Author: J. Ruostekoski
Author: J. Javanainen
Author: S. Jennewein
Author: R. Bourgain
Author: J. Pellegrino
Author: Y.R.P. Sortais
Author: A. Browaeys

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