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Atom-only descriptions of the driven dissipative Dicke model

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Atom_only_descriptions_of_the_driven_dissipative_Dicke_model.pdf (374.1Kb)
Date
03/2019
Author
Damanet, François
Daley, Andrew J.
Keeling, Jonathan
Keywords
QC Physics
TK Electrical engineering. Electronics Nuclear engineering
T-NDAS
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Abstract
We investigate how to describe the dissipative spin dynamics of the driven dissipative Dicke model, describing N two-level atoms coupled to a cavity mode, after adiabatic elimination of the cavity mode. To this end, we derive a Redfield master equation which goes beyond the standard secular approximation and large detuning limits. We show that the secular (or rotating wave) approximation and the large detuning approximation both lead to inadequate master equations, that fail to predict the Dicke transition or the damping rates of the atomic dynamics. In contrast, the full Redfield theory correctly predicts the phase transition and the effective atomic damping rates. Our work provides a reliable framework to study the full quantum dynamics of atoms in a multimode cavity, where a quantum description of the full model becomes intractable.
Citation
Damanet , F , Daley , A J & Keeling , J 2019 , ' Atom-only descriptions of the driven dissipative Dicke model ' , Physical Review. A, Atomic, molecular, and optical physics , vol. 99 , no. 3 , 033845 . https://doi.org/10.1103/PhysRevA.99.033845
Publication
Physical Review. A, Atomic, molecular, and optical physics
Status
Peer reviewed
DOI
https://doi.org/10.1103/PhysRevA.99.033845
ISSN
1050-2947
Type
Journal article
Rights
© 2019, American Physical Society. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1103/PhysRevA.99.033845
Description
Funding: F.D. and A.D. acknowledge support from the EPSRC Programme Grant Des-OEQ (EP/P009565/1), and by the EOARD via AFOSR grant number FA9550-18-1-0064. J. K. acknowledges support from SU2P.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/17161

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