Bosonic amplification of noise-induced suppression of phase diffusion

TL;DR

This paper investigates how noise-induced dephasing can suppress phase diffusion in a two-site Bose-Hubbard model, with suppression efficiency increasing with particle number due to bosonic effects.

Contribution

It reveals that bosonic amplification significantly enhances noise-induced suppression of phase diffusion in the quantum Zeno limit.

Findings

Suppression of phase diffusion is enhanced by a factor of approximately N/log N.

Dephasing can slow down phase diffusion in the quantum Zeno regime.

Bosonic effects amplify noise-induced suppression as particle number increases.

Abstract

We study the effect of noise-induced dephasing on collisional phase-diffusion in the two-site Bose-Hubbard model. Dephasing of the quasi-momentum modes may slow down phase-diffusion in the quantum Zeno limit. Remarkably, the degree of suppression is enhanced by a bosonic factor of order $N/\log{N}$ as the particle number $N$ increases.