# Enhancement of many-body quantum interference in chaotic bosonic systems

## TL;DR

This paper investigates how discrete symmetries enhance many-body quantum interference effects in chaotic bosonic systems, leading to observable deviations from classical approximations like the TWA, with evidence of dynamical localization.

## Contribution

It introduces an augmented TWA that incorporates symmetry-induced quantum interference effects, improving the understanding of quantum phenomena in chaotic bosonic systems.

## Key findings

- Enhanced quantum observables due to symmetry effects
- Evidence of dynamical localization in Bose-Hubbard model
- Deviations from classical TWA predictions indicating quantum interference

## Abstract

Although highly successful, the truncated Wigner approximation (TWA) leaves out many-body quantum interference between mean-field Gross-Pitaevskii solutions as well as other quantum effects, and is therefore essentially classical. Turned around, this implies that if a system's quantum properties deviate from TWA, they must be exhibiting some quantum phenomenon, such as localization, diffraction, or tunneling. Here, we consider in detail a particular interference effect arising from discrete symmetries, which can lead to a significant enhancement of quantum observables with respect to the TWA prediction, and derive an augmented version of the TWA in order to incorporate them. Using the Bose-Hubbard model for illustration, we further show strong evidence for the presence of dynamical localization due to remaining differences between the TWA predictions and quantum results.