Quantum dynamics in the Bose-Hubbard model remains trapped in symmetry-breaking sectors above the first excited-state quantum phase transition while classical dynamics exhibits intermittency, producing robust finite-size effects and slow thermalization even at large particle numbers.
Model parameters are /u1D43D= 1, /u1D448= − 10, and /u1D441= 55 (for the quantum case)
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Chaos, thermalization and breakdown of quantum-classical correspondence in a collective many-body system
Quantum dynamics in the Bose-Hubbard model remains trapped in symmetry-breaking sectors above the first excited-state quantum phase transition while classical dynamics exhibits intermittency, producing robust finite-size effects and slow thermalization even at large particle numbers.