Controllable Asymmetric Matter-wave Beam Splitter and Ring Potential on an Atom Chip

TL;DR

This paper demonstrates a highly controllable asymmetric matter-wave beam splitter and ring potential on an atom chip using radio-frequency dressing of Bose-Einstein condensates, enabling precise manipulation of quantum states.

Contribution

It introduces a novel method for controlling asymmetry and rotation in matter-wave potentials on an atom chip through rf-field configurations.

Findings

Achieved versatile control over potential asymmetry without displacing the wells.

Formed an isotropic ring potential by compensating gravity and inhomogeneous coupling.

Controlled BEC position and rotation velocity via rf-field phase and frequency differences.

Abstract

We have constructed an asymmetric matter-wave beam splitter and a ring potential on an atom chip with Bose-Einstein condensates using radio-frequency dressing. By applying rf-field parallel to the quantization axis in the vicinity of the static trap minima added to perpendicular rf-fields, versatile controllability on the potentials is realized. Asymmetry of the rf-induced double well is manipulated without discernible displacement of the each well along horizontal and vertical direction. Formation of an isotropic ring potential on an atom chip is achieved by compensating the gradient due to gravity and inhomogeneous coupling strength. In addition, position and rotation velocity of a BEC along the ring geometry are controlled by the relative phase and the frequency difference between the rf-fields, respectively.