Adding an auxiliary nonlinear term to the quantum Rabi model extends its quantum phase transition into a continuous regime, yielding globally diverging quantum Fisher information and criticality-enhanced metrology precision in dynamics that persists with decoherence.
Quantum phase transition and spontaneous symmetry breaking in a nonlinear quantum Rabi model
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Extended abstract on circuit-QED proposals for two-photon interactions and scattering-based detection of spectral collapse.
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Globalized critical quantum metrology in dynamics of quantum Rabi model by auxiliary nonlinear term
Adding an auxiliary nonlinear term to the quantum Rabi model extends its quantum phase transition into a continuous regime, yielding globally diverging quantum Fisher information and criticality-enhanced metrology precision in dynamics that persists with decoherence.
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Observing the Spectral Collapse of Two-Photon Interaction Models
Extended abstract on circuit-QED proposals for two-photon interactions and scattering-based detection of spectral collapse.