Optical signatures of quantum phase transitions in a light-matter system

Abstract

Information about quantum phase transitions in conventional condensed matter systems, must be sought by probing the matter system itself. By contrast, we show that mixed matter-light systems offer a distinct advantage in that the photon field carries clear signatures of the associated quantum critical phenomena. Having derived an accurate, size-consistent Hamiltonian for the photonic field in the well-known Dicke model, we predict striking behavior of the optical squeezing and photon statistics near the phase transition. The corresponding dynamics resemble those of a degenerate parametric amplifier. Our findings boost the motivation for exploring exotic quantum phase transition phenomena in atom-cavity, nanostructure-cavity, and nanostructure-photonic-band-gap systems.

4 pages, 4 figures

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Cited by in corpus (8)

• Circuit QED and engineering charge based superconducting qubits
• Dilute gas of ultracold two-level atoms inside a cavity; generalized Dicke model
• Quantum phase transition of nonlinear light in the finite size Dicke Hamiltonian
• Robust quantum correlations in out-of-equilibrium matter-light systems
• Quantum Hysteresis in Coupled Light-Matter Systems
• Chapter: Vulnerability of Quantum Information Systems to Collective Manipulation
• Large dynamic light-matter entanglement from driving neither too fast nor too slow
• Energy transfer in $N$-component nanosystems enhanced by pulse-driven vibronic many-body entanglement