2019/04/30 by Masaya Nakagawa, Naoto Tsuji, Norio Kawakami +1 · 2 citations
Physics and Astronomy · #cond-mat.quant-gas #cond-mat.stat-mech #cond-mat.str-el #quant-ph
paper · pdf · doi:10.1103/physrevlett.124.147203
published as Phys. Rev. Lett. 124, 147203 (2020) · 12 pages, 9 figures. v2: title changed, results updated. v3: published version
arxiv created 2020/04/10 · arxiv updated 2020/04/13
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.