Many-body phases from effective geometrical frustration and long-range interactions in a subwavelength latticeKolmogorov Scaling in Turbulent 2D Bose-Einstein Condensates

Many-body phases from effective geometrical frustration and long-range interactions in a subwavelength latticeKolmogorov Scaling in Turbulent 2D Bose-Einstein Condensates

Geometrical frustration and long-range couplings are key contributors to create quantum phases with different properties throughout physics. We propose a scheme where both ingredients naturally emerge in a Raman induced subwavelength lattice. We first demonstrate that Raman-coupled multicomponent quantum gases can realize a highly versatile frustrated Hubbard Hamiltonian with long-range interactions. The deeply subwavelength lattice period leads to strong long-range interparticle repulsion with tunable range and decay. We numerically demonstrate that the combination of frustration and long-range couplings generates many-body phases of bosons, including a range of density-wave and superfluid phases with broken translational and time reversal symmetries, respectively. Our results thus represent a powerful approach for efficiently combining long-range interactions and frustration in quantum simulations.

Many-body phases from effective geometrical frustration and long-range interactions in a subwavelength lattice; D. Burba, G. Juzeliūnas, I. B. Spielman, and L. Barbiero; Communications Physics 8 141 (2025). doi:10.1038/s42005-025-02043-y