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Atomtronic multiterminal Aharonov-Bohm interferometer
Citation
Lau, J. W. Z., Gan, K. S., Dumke, R., Amico, L., Kwek, L.-C., & Haug, T. (2023). Atomtronic multiterminal Aharonov-Bohm interferometer. Physical Review A, 107(5), Article L051303. https://doi.org/10.1103/physreva.107.L051303
Author
Lau, Jonathan Wei Zhong
•
Gan, Koon Siang
•
Dumke, Rainer
•
Amico, Luigi
•
•
Haug, Tobias
Abstract
We study a multifunctional device for cold atoms consisting of a three-terminal ring circuit pierced by a synthetic magnetic flux, where the ring can be continuous or discretized. The flux controls the atomic current through the ring via the Aharonov-Bohm effect. Our device shows a flux-induced transition of reflections from an Andreev-like negative density to positive density. Further, the flux can direct the atomic current into specific output ports, realizing a flexible nonreciprocal switch to connect multiple atomic systems or sense rotations. By changing the flux linearly in time, we convert constant matter wave currents into an ac modulated current. This effect can be used to realize an atomic frequency generator and study fundamental problems related to the Aharonov-Bohm effect. We experimentally demonstrate Bose-Einstein condensation into the light-shaped optical potential of the three-terminal ring. Our work opens up the possibility of atomtronic devices for practical applications in quantum technologies.
Date Issued
2023
Publisher
American Physical Society
Journal
Physical Review A
DOI
10.1103/physreva.107.l051303