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arXiv · 1810.08525

Topological pumping in Aharonov-Bohm rings

Tobias Haug·Rainer Dumke·Leong-Chuan Kwek·Luigi Amico
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Abstract

Topological Thouless pumping and Aharonov-Bohm effect are both fundamental effects enabled by the topological properties of the system. Here, we study both effects together: topological pumping of interacting particles through Aharonov-Bohm rings. This system can prepare highly entangled many-particle states, transport them via topological pumping and interfere them, revealing a fractional flux quantum. The type of the generated state is revealed by non-trivial Aharonov-Bohm interference patterns that could be used for quantum sensing. The reflections induced by the interference result from transitions between topological bands. Specific bands allow transport with a band gap scaling as the square-root of the particle number. Our system paves a new way for a combined system of state preparation and topological protected transport.

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Tobias Haug, Rainer Dumke, Leong-Chuan Kwek, Luigi Amico. 2019-09-24. Topological pumping in Aharonov-Bohm rings. https://doi.org/10.1038/s42005-019-0229-2

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