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This study maps the global complexity phase diagram of the Dicke model, identifying a sharp transition in light-matter coupling where information propagation dynamics shift abruptly. By linking these changes to jumps in Krylov entropy, researchers provide a new framework for categorizing quantum many-body systems far from equilibrium without relying on random disorder. The findings offer significant insights into probing boundaries between order and chaos within fundamental quantum interactions.
George Mason Physicists Map Quantum Complexity Phase Diagram of Dicke Model

Researchers from George Mason University’s Department of Physics and Astronomy mapped the complexity phase diagram of the Dicke model, revealing a transition coinciding with a jump in Krylov entropy.
George Mason University physicists have mapped a phase diagram for the Dicke model, a system describing light-matter interactions, revealing two distinct regimes of dynamic behavior. The research demonstrates a connection between the rate at which information spreads and fundamental shifts within the quantum system; at the transition, the slope of changes coincides with a jump in Krylov entropy. Researchers elucidated…
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