The study finds that the spectral form factor in the closed Dicke model deviates from Poissonian expectations in the regular regime unless spin sizes are very large, while the dissipative spectral form factor in the open model with cavity damping shows robust quadratic dip-ramp-plateau behavior in a
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Krylov subspace methods efficiently describe quantum evolution, operator growth, and chaos in many-body systems, with metrics like Krylov complexity and applications in open systems, QFT, and quantum computing.
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Comparative Study of Indicators of Chaos in the Closed and Open Dicke Model
The study finds that the spectral form factor in the closed Dicke model deviates from Poissonian expectations in the regular regime unless spin sizes are very large, while the dissipative spectral form factor in the open model with cavity damping shows robust quadratic dip-ramp-plateau behavior in a
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Quantum Dynamics in Krylov Space: Methods and Applications
Krylov subspace methods efficiently describe quantum evolution, operator growth, and chaos in many-body systems, with metrics like Krylov complexity and applications in open systems, QFT, and quantum computing.