Dynamical Sign Reversal of Magnetic Correlations in Dissipative Hubbard Models

In quantum magnetism, the virtual exchange of particles mediates an interaction between spins. Here, we show that an inelastic Hubbard interaction fundamentally alters the magnetism of the Hubbard model due to dissipation in spin-exchange processes, leading to sign reversal of magnetic correlations...

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Bibliographic Details
Published inPhysical review letters Vol. 124; no. 14; p. 147203
Main Authors Nakagawa, Masaya, Tsuji, Naoto, Kawakami, Norio, Ueda, Masahito
Format Journal Article
LanguageEnglish
Published United States 10.04.2020
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Summary:In quantum magnetism, the virtual exchange of particles mediates an interaction between spins. Here, we show that an inelastic Hubbard interaction fundamentally alters the magnetism of the Hubbard model due to dissipation in spin-exchange processes, leading to sign reversal of magnetic correlations in dissipative quantum dynamics. This mechanism is applicable to both fermionic and bosonic Mott insulators, and can naturally be realized with ultracold atoms undergoing two-body inelastic collisions. The dynamical reversal of magnetic correlations can be detected by using a double-well optical lattice or quantum-gas microscopy, the latter of which facilitates the detection of the magnetic correlations in one-dimensional systems because of spin-charge separation. Our results open a new avenue toward controlling quantum magnetism by dissipation.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.124.147203