Reversal of quantized Hall drifts at noninteracting and interacting topological boundaries
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2024-04-19
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Journal Article
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Abstract
The transport properties of gapless edge modes at boundaries between topologically distinct domains are of fundamental and technological importance. We experimentally studied long-distance quantized Hall drifts in a harmonically confined topological pump of ultracold fermionic atoms. We found that quantized drifts halt and reverse their direction when the atoms reach a critical slope of the confining potential, revealing the presence of a topological boundary. The drift reversal corresponded to a band transfer between a band with Chern number C = +1 and another with C = -1 through a gapless edge mode, in agreement with the bulk-edge correspondence for noninteracting particles. Nonzero repulsive Hubbard interactions led to the emergence of an additional edge in the system through a mechanism in which pairs of fermions are split.
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published
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384 (6693)
Pages / Article No.
317 - 320
Publisher
AAAS
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03599 - Esslinger, Tilman / Esslinger, Tilman
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182650 - Interplay between Topology, Interactions and Dissipation in Driven Quantum Many-Body Systems (SNF)
212168 - Tailoring interactions in quantum matter (SNF)
209376 - Adiabatically pumping topologically protected quantum many-body systems (AdiaPump) (SNF)
212168 - Tailoring interactions in quantum matter (SNF)
209376 - Adiabatically pumping topologically protected quantum many-body systems (AdiaPump) (SNF)
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