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Dicke quantum spin glass of atoms and photons
Philipp Strack1, Subir Sachdev
1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Abstract:
Recent studies of strongly interacting atoms and photons in optical cavities have rekindled interest in the Dicke model of atomic qubits coupled to discrete photon cavity modes. We study the multimode Dicke model with variable atom-photon couplings. We argue that a quantum spin-glass phase can appear, with a random linear combination of the cavity modes superradiant. We compute atomic and photon spectral response functions across this quantum phase transition, both of which should be accessible in experiments.
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