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19 April 2024 |
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Disorder-induced Thouless pumping of ultracold atoms in an optical lattice | | Shuta Nakajima
; Nobuyuki Takei
; Keita Sakuma
; Yoshihito Kuno
; Pasquale Marra
; Yoshiro Takahashi
; | | Date: |
14 Jul 2020 | | Abstract: | Robustness against perturbations lies at the heart of topological phenomena.
If, however, a perturbation such as disorder becomes dominant, it may cause a
topological phase transition between topologically non-trivial and trivial
phases. Here we experimentally reveal the competition and interplay between
topology and disorder in a Thouless pump realized with ultracold atoms in an
optical lattice, by creating a quasi-periodic potential from weak to strong
regimes in a controllable manner. We demonstrate a disorder-induced pumping in
which the presence of disorder can induce a non-trivial pump for a specific
pumping sequence, while no pump is observed in the clean limit. Our highly
controllable system, which can also straightforwardly incorporate interatomic
interaction, could be a unique platform for studying various disorder-related
novel effects in a wide range of topological quantum phenomena. | | Source: | arXiv, 2007.6817 | | Services: | Forum | Review | PDF | Favorites | |
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