Dynamic sensitivity of phton-dressed atomic ensenmble with quantum criticality

Abstract

We study the dynamic sensitivity of an atomic ensemble dressed by a single-mode cavity field (called a photon-dressed atomic ensemble), which is described by the Dicke model near the quantum critical point. It is shown that when an extra atom in a pure initial state passes through the cavity, the photon-dressed atomic ensemble will experience a quantum phase transition, showing an explicit sudden change in its dynamics characterized by the Loschmidt echo of this quantum critical system. With such dynamic sensitivity, the Dicke model can resemble to the cloud chamber for detecting a flying particle by the enhanced trajectory due to the classical phase transition.

7 pages, 4 figures

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• Dynamics of Loschmidt echoes and fidelity decay
• Proposed realization of the Dicke-model quantum phase transition in an optical cavity QED system
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• Probing the quantum phase transition in the Dicke model through mechanical vibrations
• The three site interacting spin chain in staggered field: Fidelity vs Loschmidt echo
• Complexity, Information Geometry, and Loschmidt Echo near Quantum Criticality
• Criticality-enhanced quantum sensor at finite temperature
• Superradiant Phase Transition in the Strong Coupling Regime
• Extended JC-Dicke model for a two-component atomic BEC inside a cavity
• Quantum statistics of the collective excitations of an atomic ensemble inside a cavity
• Fidelity susceptibility and Loschmidt echo for generic paths in a three spin interacting transverse Ising model
• Controlling the superradiant phase transition in the quantum Rabi model
• Dynamic sensitivity of quantum Rabi model with quantum criticality