Related papers: Tuning long-range fermion-mediated interactions in cold-atom quantum simulators

Tuning long-range fermion-mediated interactions in cold-atom quantum simulators

URL: http://arxiv.org/abs/2203.17022v1
Date: Thu, 31 Mar 2022 13:32:12 GMT
Title: Tuning long-range fermion-mediated interactions in cold-atom quantum simulators
Authors: Javier Arg\"uello-Luengo, Alejandro Gonz\'alez-Tudela, Daniel Gonz\'alez-Cuadra
Abstract summary: Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior. Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
Score: 68.8204255655161
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior. Fermionic atoms in ultracold atomic mixtures can act as mediators, giving rise to long-range RKKY-type interactions characterized by the dimensionality and density of the fermionic gas. Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions, extending the existing quantum simulation toolbox. In particular, we include an additional optical lattice for the fermionic mediator, as well as anisotropic traps to change its dimensionality in a continuous manner. This allows us to interpolate between power-law and exponential decays, introducing an effective cutoff for the interaction range, as well as to tune the relative interaction strengths at different distances. Finally, we show how our approach allows to investigate frustrated regimes that were not previously accessible, where symmetry-protected topological phases as well as chiral spin liquids emerge.

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