Interferometry using spinor Bose-Einstein condensates

TL;DR

This paper explores a novel interferometry method using spinor Bose-Einstein condensates, where phase differences influence population outcomes, enabling precise measurements of quantum phase evolution.

Contribution

It introduces a new multi-arm interferometry technique leveraging phase-dependent population dynamics in spinor BECs under time-varying magnetic fields.

Findings

Demonstrates phase-dependent population changes in spinor BECs.

Proposes a method for measuring phase differences via population analysis.

Shows potential for high-precision quantum measurements.

Abstract

We study the time-evolution of an optically trapped spinor Bose-Einstein condensate under the influence of a dominating magnetic bias field in the z-direction, and a perpendicular smaller field that couples the spinor states. We show that if the bias field depends quadratically on time, the relative phases of the spinor components affect the populations of the final state. This allows one to measure the differences in the time-evolution of the relative phases, thereby realizing a multi-arm interferometer in a spinor Bose-Einstein condensate.