Laughlin's Topological Charge Pump in an Atomic Hall Cylinder

Laughlin's Topological Charge Pump in an Atomic Hall Cylinder

The quantum Hall effect occurring in two-dimensional electron gases was first explained by Laughlin, who developed a thought experiment that laid the groundwork for our understanding of topological quantum matter. His proposal is based on a quantum Hall cylinder periodically driven by an axial magne...

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Bibliographic Details
Published in:Physical review letters Vol. 128; no. 17; p. 173202
Main Authors: Fabre, Aurélien, Bouhiron, Jean-Baptiste, Satoor, Tanish, Lopes, Raphael, Nascimbene, Sylvain
Format: Journal Article
Language:English
Published: United States American Physical Society 29-04-2022
Subjects:
Condensed Matter
Physics
Quantum Physics
Hall effect: quantum
electron: gas
dimension: 2
topology
spin
dysprosium
cylinder
charge: topological
atom
magnetic field: axial
cyclic
quantization
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Summary:The quantum Hall effect occurring in two-dimensional electron gases was first explained by Laughlin, who developed a thought experiment that laid the groundwork for our understanding of topological quantum matter. His proposal is based on a quantum Hall cylinder periodically driven by an axial magnetic field, resulting in the quantized motion of electrons. We realize this milestone experiment with an ultracold gas of dysprosium atoms, the cyclic dimension being encoded in the electronic spin and the axial field controlled by the phases of laser-induced spin-orbit couplings. Our experiment provides a straightforward manifestation of the nontrivial topology of quantum Hall insulators, and could be generalized to strongly correlated topological systems.
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content type line 23
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.128.173202