Tuning Long-Range Fermion-Mediated Interactions in Cold-Atom Quantum Simulators

被引:6
作者
Arguello-Luengo, Javier [1 ]
Gonzalez-Tudela, Alejandro [2 ]
Gonzalez-Cuadra, Daniel [3 ,4 ]
机构
[1] Barcelona Inst Sci & Technol, ICFO Inst Ciencies Foton, Avinguda Carl Friedrich Gauss 3, Castelldefels 08860, Barcelona, Spain
[2] Inst Fundamental Phys IFF CSIC, Calle Serrano 113b, Madrid 28006, Spain
[3] Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria
[4] Austrian Acad Sci, Inst Quantum Opt & Quantum Informat, A-6020 Innsbruck, Austria
关键词
GAS; MIXTURE; BOSE; MODELS; BOSONS;
D O I
10.1103/PhysRevLett.129.083401
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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 Ruderman-Kittel-Kasuya-Yosida-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 one 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 one to investigate frustrated regimes that were not previously accessible, where symmetry -protected topological phases as well as chiral spin liquids emerge.
引用
收藏
页数:9
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