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arXiv:2205.13162 (cond-mat)
[Submitted on 26 May 2022 (v1), last revised 13 Feb 2023 (this version, v2)]

Title:Observation of the Sign Reversal of the Magnetic Correlation in a Driven-Dissipative Fermi Gas in Double Wells

Authors:Kantaro Honda, Shintaro Taie, Yosuke Takasu, Naoki Nishizawa, Masaya Nakagawa, Yoshiro Takahashi
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Abstract:We report the observation of the sign reversal of the magnetic correlation from antiferromagnetic to ferromagnetic in a dissipative Fermi gas in double wells, utilizing the dissipation caused by on-site two-body losses in a controlled manner. We systematically measure dynamics of the nearest-neighbor spin correlation in an isolated double-well optical lattice, as well as a crossover from an isolated double-well lattice to a one-dimensional uniform lattice. In a wide range of lattice configurations over an isolated double-well lattice, we observe a ferromagnetic spin correlation, which is consistent with a Dicke type of correlation expected in the long-time limit. This work demonstrates the control of quantum magnetism in open quantum systems with dissipation.
Comments: 12 pages, 9 figures
Subjects: Quantum Gases (cond-mat.quant-gas)
Cite as: arXiv:2205.13162 [cond-mat.quant-gas]
  (or arXiv:2205.13162v2 [cond-mat.quant-gas] for this version)
  https://doi.org/10.48550/arXiv.2205.13162
Journal reference: Phys. Rev. Lett. 130, 063001 (2023)
Related DOI: https://doi.org/10.1103/PhysRevLett.130.063001

Submission history

From: Kantaro Honda [view email]
[v1] Thu, 26 May 2022 05:23:50 UTC (1,036 KB)
[v2] Mon, 13 Feb 2023 03:43:50 UTC (1,084 KB)
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