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.
1, all values are /u1D456/u1D45B,/u1D45F ≠ 0, indicating a symmetry-breaking scenario where ⟨ ˆ/u1D43C⟩ ≠ 0
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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.