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 asymmetry of rf-dressed potentials is realized. Asymmetry of the rf-induced double well is controlled over a wide range without discernible displacement of each well. 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.
- Received 31 May 2015
- Revised 28 November 2015
DOI:https://doi.org/10.1103/PhysRevA.93.033612
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