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Title: Equilibrium and disorder-induced behavior in quantum light-matter systems
Authors: Mascarenhas, E.
Heaney, L. 
Aguiar, M.C.O.
Santos, M.F.
Issue Date: Apr-2012
Citation: Mascarenhas, E., Heaney, L., Aguiar, M.C.O., Santos, M.F. (2012-04). Equilibrium and disorder-induced behavior in quantum light-matter systems. New Journal of Physics 14 : -. ScholarBank@NUS Repository.
Abstract: We analyze equilibrium properties of coupled-doped cavities described by the Jaynes-Cummings-Hubbard Hamiltonian. In particular, we characterize the entanglement of the system in relation to the insulating-superfluid phase transition. We point out the existence of a crossover inside the superfluid phase of the system when the excitations change from polaritonic to purely photonic. Using an ensemble statistical approach for small systems and stochastic mean-field theory for large systems, we analyze static disorder of the characteristic parameters of the system and explore the ground state-induced statistics. We report on a variety of glassy phases deriving from the hybrid statistics of the system. On-site strong disorder induces insulating behavior through two different mechanisms. For disorder in the light-matter detuning, low-energy cavities dominate the statistics, allowing the excitations to localize and bunch in such cavities. In the case of disorder in the light-matter coupling, sites with strong coupling between light and matter become very significant, which enhances the Mott-like insulating behavior. Intersite (hopping) disorder induces fluidity and the dominant sites are strongly coupled to each other.© IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Source Title: New Journal of Physics
ISSN: 13672630
DOI: 10.1088/1367-2630/14/4/043033
Appears in Collections:Staff Publications

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