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Title: Atomtronic multi-terminal Aharonov-Bohm interferometer
Authors: Lau, Jonathan Wei Zhong
Gan, Koon Siang
Dumke, Rainer
Amico, Luigi
Kwek, Leong Chuan
Haug, Tobias
Keywords: Science::Physics
Engineering::Electrical and electronic engineering
Issue Date: 2023
Source: Lau, J. W. Z., Gan, K. S., Dumke, R., Amico, L., Kwek, L. C. & Haug, T. (2023). Atomtronic multi-terminal Aharonov-Bohm interferometer. Physical Review A, 107(5), L051303-1-L051303-7.
Journal: Physical Review A 
Abstract: We study a multi-functional 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 non-reciprocal 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 novel atomtronic devices for practical applications in quantum technologies.
ISSN: 2469-9926
DOI: 10.1103/PhysRevA.107.L051303
Schools: School of Physical and Mathematical Sciences 
School of Electrical and Electronic Engineering 
National Institute of Education 
Research Centres: MajuLab, CNRS-UNS-NUS-NTU International Joint Research Unit, Singapore UMI 3654
Rights: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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