Enhanced phase sensitivity and soliton formation in an integrated BEC interferometer

TL;DR

This paper investigates how mean field interactions in a microtrap-based Bose-Einstein condensate interferometer can enhance phase sensitivity through adiabatic dark soliton creation, with robustness against thermal fluctuations.

Contribution

It demonstrates the conditions under which non-linearity improves interferometer sensitivity and links this to adiabatic dark soliton formation in integrated BEC systems.

Findings

Non-linearity enhances phase sensitivity in BEC interferometers.

Adiabatic dark soliton generation improves measurement precision.

Robustness of soliton-based sensitivity against thermal fluctuations.

Abstract

We study the dynamics of Bose-Einstein condensates in time-dependent microtraps for the purpose of understanding the influence of the mean field interaction on the performance of interferometers. We identify conditions where the non-linearity due to atom interactions increases the sensitivity of interferometers to a phase shift. This feature is connected with the adiabatic generation of a dark soliton. We analyze the robustness of this phenomenon with respect to thermal fluctuations, due to excited near fields in an electromagnetic surface trap.