In coupled Dicke lattices, frustration induces photonic density-wave ordering that is predictable from the symmetric-phase excitation spectrum, plus an emergent gapless mode in 1D and flux-tunable quasi-periodic order.
Quantum simulation of thermalization dynamics of a nonuniform Dicke model
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abstract
Previous experimental realizations of Dicke model in atomic or ionic systems are based on global observables assuming uniform spin-boson coupling, while inevitable experimental nonuniformity on the one hand requires site-resolved measurement of spin states, and on the other hand provides potential quantum advantage on the simulation of multi-spin distributions. Here we report the quantum simulation of a nonuniform Dicke-like model in a two-dimensional (2D) crystal of up to 200 ions. We explicitly demonstrate the sensitivity of few-spin observables and multi-spin distributions to the spatial inhomogeneity of the model, and examine the thermalization dynamics of the nonuniform model by measuring the subsystem entropies of selected ion groups. Our work enables the study of Dicke-like models beyond the symmetric subspace, paving the way toward understanding the role of disorder in its thermalization and quantum chaos behavior.
fields
quant-ph 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
Trapped-ion experiment realizes temporal DQPTs in Dicke model, extracting rate function turn-around points in quantitative agreement with theory for both symmetric/asymmetric initial states and with dissipation.
citing papers explorer
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Frustrated superradiant phases in one- and two-dimensional lattices
In coupled Dicke lattices, frustration induces photonic density-wave ordering that is predictable from the symmetric-phase excitation spectrum, plus an emergent gapless mode in 1D and flux-tunable quasi-periodic order.
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Temporal Dynamical Quantum Phase Transition in Dicke Model with Trapped Ions
Trapped-ion experiment realizes temporal DQPTs in Dicke model, extracting rate function turn-around points in quantitative agreement with theory for both symmetric/asymmetric initial states and with dissipation.