Many-Body Interference at the Onset of Chaos

We unveil the signature of many-body interference across dynamical regimes of the Bose-Hubbard model. Increasing the particles' indistinguishability enhances the temporal fluctuations of few-body observables, with a dramatic amplification at the onset of quantum chaos. By resolving the exchange symmetries of partially distinguishable particles, we explain this amplification as the fingerprint of the initial state's coherences in the eigenbasis.

Automated summary

We reveal the existence of many-body interference in the dynamical regimes of the Bose-Hubbard model. The temporal fluctuations of few-body observables are significantly enhanced at the onset of quantum chaos due to the increased indistinguishability of particles. By analyzing the exchange symmetries of partially distinguishable particles, we demonstrate that this enhancement is the manifestation of the coherence of the initial state in the eigenbasis.