Interferometry using Adiabatic Passage in Dilute Gas Bose-Einstein Condensates

TL;DR

This paper proposes a three-well interferometry method using adiabatic passage in Bose-Einstein condensates, demonstrating stable splitting, recombination, and enhanced sensitivity due to nonlinear interactions.

Contribution

It introduces a fractional coherent transport adiabatic passage protocol for BEC interferometry that maintains stability despite nonlinear interactions.

Findings

Stable spatial splitting achieved with adiabatic passage.

Reversal of protocol enables phase-dependent recombination.

Nonlinear interactions enhance measurement sensitivity.

Abstract

We theoretically examine three-well interferometry in Bose-Einstein condensates using adiabatic passage. Specifically, we demonstrate that a fractional coherent transport adiabatic passage protocol enables stable spatial splitting in the presence of nonlinear interactions. A reversal of this protocol produces a coherent recombination of the BEC with a phase-dependent population of the three wells. The effect of nonlinear interactions on the interferometric measurement is quantified and found to lead to an enhancement in sensitivity for moderate interaction strengths.