Superradiant and lasing states in driven-dissipative Dicke models
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We present the non-equilibrium phase diagram of a model which can demonstrate both Dicke-Hepp-Lieb superradiance and regular lasing by varying the coherent and incoherent driving terms. We find that the regions in the phase diagram corresponding to superradiance and standard lasing are always separated by a normal region. We analyse the behaviour of the system using a combination of exact numerics based on permutation symmetry of the density matrix for small to intermediate numbers of molecules, and second order cumulant equations for large numbers of molecules. We find that the nature of the photon distribution in the superradiant and lasing states are very similar, but the emission spectrum is very different. We also show that in the presence of both coherent and incoherent driving, a period-doubling route to a chaotic state occurs.
Kirton , P G & Keeling , J M J 2018 , ' Superradiant and lasing states in driven-dissipative Dicke models ' New Journal of Physics , vol 20 , 015009 . DOI: 10.1088/1367-2630/aaa11d
New Journal of Physics
© 2018 The Author(s). Published by IOP Publishing Ltd on behalf of Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
DescriptionFunding: UK EPSRC (EP/M010910/1) (PK); EPSRC programs TOPNES (EP/I031014/1) and “Hybrid Polaritonics” (EP/M025330/1) (JK).
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