A Multi-Path Interferometer on an Atom Chip

TL;DR

This paper presents a compact atom-chip multi-path interferometer using Bose-Einstein condensates, enhancing sensitivity and simplicity for precise quantum and gravity measurements.

Contribution

It introduces a novel multi-path interferometric scheme on an atom chip utilizing coherent coupling between Zeeman states, improving measurement capabilities.

Findings

Demonstrated a compact, easy-to-use atom-chip interferometer.

Achieved sharp interference fringes with multi-path scheme.

Provided a new method for measuring light-atom and surface-atom interactions.

Abstract

Cold-atom interferometry is a powerful tool for high-precision measurements of the quantum properties of atoms, many-body interactions and gravity. Further enhancement of sensitivity and reduction of complexity of these devices are crucial conditions for success of their applications. Here we introduce a multi-path interferometric scheme that offers advances in both these aspects. It uses coherent coupling between Bose-Einstein condensates in different Zeeman states to generate an interferometric signal with sharp fringes. We realise such an interferometer as a compact easy-to-use atom-chip device and thus provide an alternative method for measurement of the light-atom and surface-atom interactions.