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Quantum spin ice in three-dimensional Rydberg atom arrays

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What is the main idea of the paper?

AI: The main idea of the paper is to propose a way to realize a U(1) quantum spin liquid in three spatial dimensions, using a pyrochlore lattice Rydberg atom array as a promising platform to access a confinement-deconfinement transition in a quantum simulator. The paper also discusses the ground state phase diagram of the proposed Rydberg system and suggests experimental probes for distinguishing the deconfined phase from ordered phases.

Authors

Jeet Shah, Gautam Nambiar, Alexey V. Gorshkov, Victor Galitski

Abstract

Quantum spin liquids are exotic phases of matter whose low-energy physics is described as the deconfined phase of an emergent gauge theory. With recent theory proposals and an experiment showing preliminary signs of Z2 topological order [G. Semeghini et al., Science 374, 1242 (2021)], Rydberg atom arrays have emerged as a promising platform to realize a quantum spin liquid. In this work, we propose a way to realize a U(1) quantum spin liquid in three spatial dimensions, described by the deconfined phase of U(1) gauge theory in a pyrochlore lattice Rydberg atom array. We study the ground state phase diagram of the proposed Rydberg system as a function of experimentally relevant parameters. Within our calculation, we find that by tuning the Rabi frequency, one can access both the confinement-deconfinement transition driven by a proliferation of "magnetic" monopoles and the Higgs transition driven by a proliferation of "electric" charges of the emergent gauge theory. We suggest experimental probes for distinguishing the deconfined phase from ordered phases. This work serves as a proposal to access a confinement-deconfinement transition in three spatial dimensions on a Rydberg-based quantum simulator.

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