In the Tavis-Cummings model, collective dynamics are linear at vanishing excitation density and nonlinear at finite density, with mean-field accurate for large N while cluster expansion captures finite-N effects.
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Excitation density controlled regimes of collective light--matter dynamics
In the Tavis-Cummings model, collective dynamics are linear at vanishing excitation density and nonlinear at finite density, with mean-field accurate for large N while cluster expansion captures finite-N effects.