paper

A Bright Solitonic Matter-Wave Interferometer

arXiv:1403.3485 · doi:10.1103/PhysRevLett.113.013002

Abstract

We present the first realisation of a solitonic atom interferometer. A Bose-Einstein condensate of atoms of rubidium-85 is loaded into a horizontal optical waveguide. Through the use of a Feshbach resonance, the -wave scattering length of the Rb atoms is tuned to a small negative value. This attractive atomic interaction then balances the inherent matter-wave dispersion, creating a bright solitonic matter wave. A Mach-Zehnder interferometer is constructed by driving Bragg transitions with the use of an optical lattice co-linear with the waveguide. Matter wave propagation and interferometric fringe visibility are compared across a range of -wave scattering values including repulsive, attractive and non-interacting values. The solitonic matter wave is found to significantly increase fringe visibility even compared with a non-interacting cloud.

6 pages, 4 figures

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