Efficient two-mode interferometers with spinor Bose-Einstein condensates

TL;DR

This paper demonstrates that three-mode and two-mode spinor Bose-Einstein condensate interferometers can achieve ultra-high phase sensitivity, with effective two-mode setups maintaining high efficiency even at zero magnetization.

Contribution

It introduces effective two-mode interferometers within spinor BECs that retain high phase sensitivity, expanding the understanding of quantum interferometry with atomic condensates.

Findings

Three-mode interferometers with spinor BECs achieve ultra-high phase sensitivity.

Effective two-mode interferometers also provide high phase sensitivity.

Zero magnetization case preserves interferometric efficiency.

Abstract

We consider general three-mode interferometers using a spin-1 atomic Bose-Einstein condensate with macroscopic magnetization. We show that these interferometers, combined with the measurement of the number of particles in each output port, provide an ultra-high phase sensitivity. We construct effective two-mode interferometers which involve two Zeeman modes showing that they also provide an ultra-high phase sensitivity but of a bit reduced factor in the corresponding Fisher information. A special case of zero magnetization is shown to persist the efficiency of the two-mode interferometry.