Engineering frustrated Rydberg spin models by graphical Floquet modulation

TL;DR

This paper introduces a systematic, experimentally feasible method to engineer and control long-range interactions in Rydberg atom arrays, enabling the simulation of complex quantum spin models and phases.

Contribution

It develops a universal graph-theoretic framework for designing modulation patterns to realize arbitrary long-range interactions in Rydberg systems.

Findings

Controlled interaction ratios in kagome lattices achieved.

Transition between spin-ordered and spin liquid phases demonstrated.

Universal approach applicable to all 11 planar Archimedean lattices.

Abstract

Arrays of Rydberg atoms interacting via dipole-dipole interactions offer a powerful platform for probing quantum many-body physics. However, these intrinsic interactions also determine and constrain the models -- and parameter regimes thereof -- for quantum simulation. Here, we propose a systematic framework to engineer arbitrary desired long-range interactions in Rydberg-atom lattices, enabling the realization of fully tunable $J_1$-$J_2$-$J_3$ Heisenberg models. Using site-resolved periodic modulation of Rydberg states, we develop an experimentally feasible protocol to precisely control the interaction ratios $J_2/J_1$ and $J_3/J_1$ in a kagome lattice. This control can increase the effective range of interactions and drive transitions between competing spin-ordered and spin liquid phases. To generalize this approach beyond the kagome lattice, we reformulate the design of modulation patterns through a graph-theoretic approach, demonstrating the universality of our method across all 11 planar Archimedean lattices. Our strategy overcomes the inherent constraints of power-law-decaying dipolar interactions, providing a versatile toolbox for exploring frustrated magnetism, emergent topological phases, and quantum correlations in systems with long-range interactions.