Spin-mixing Interferometry with Bose-Einstein Condensates

TL;DR

This paper explores the potential of unstable spinor Bose-Einstein condensates for creating nonlinear three-mode interferometers that can surpass shot-noise limits, considering decoherence effects.

Contribution

It extends the standard SU(1,1) approach to identify parameter regimes enabling sub shot-noise sensitivities in spin-mixing interferometry.

Findings

Identification of parameter regimes for enhanced sensitivity

Analysis of decoherence effects on interferometer performance

Potential for surpassing shot-noise limits in practical setups

Abstract

Unstable spinor Bose-Einstein condensates are ideal candidates to create nonlinear three-mode interferometers. Our analysis goes beyond the standard SU(1,1) parametric approach and therefore provides the regime of parameters where sub shot-noise sensitivities can be reached with respect to the input total average number of particles. Decoherence due to particle losses and finite detection efficiency are also considered.