Journal
PHYSICAL REVIEW E
Volume 88, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.88.032913
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Funding
- NSF [DMR-1147430]
- CONICET [PIP 0662]
- ANPCyT [PICT 2010-1907]
- UNLP, Argentina [PID 11/X614]
- SeCyT-UNC
- MinCyTCor
- NVIDIA Professor Partnership Program
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1147430] Funding Source: National Science Foundation
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Numerically, we study the time fluctuations of few-body observables after relaxation in isolated dynamical quantum systems of interacting particles. Our results suggest that they decay exponentially with system size in both regimes, integrable and chaotic. The integrable systems considered are solvable with the Bethe ansatz and have a highly nondegenerate spectrum. This is in contrast with integrable Hamiltonians mappable to noninteracting ones. We show that the coefficient of the exponential decay depends on the level of delocalization of the initial state with respect to the energy shell.
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