Simulations of 21-30 Rb-Cs atoms on a Kagome lattice find a 1/4 Rydberg-density window with positive topological entropy, interpreted as a quantum spin liquid phase.
One-to-one quantum simulation of a frustrated magnet with 256 qubits
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abstract
Analog quantum simulators offer a powerful microscopic probe of quantum many-body systems, yet have largely been benchmarked against model Hamiltonians rather than real materials. Here, we use a 256-qubit Rydberg simulator to implement the effective Hamiltonian of the frustrated triangular-lattice magnet TmMgGaO$_4$. Simulated magnetization curves agree quantitatively with susceptibility measurements on single crystals, and both platforms consistently determine the antiferromagnetic phase transition. Snapshot-resolved analysis confirms that quantum fluctuations, rather than disorder, govern the intermediate paramagnetic regime. Having established this correspondence, we access non-equilibrium dynamics following a sudden quench, a regime at picosecond material timescales where entanglement growth places the problem beyond classical reach. The simulator reveals thermalization of local observables, demonstrating that analog quantum simulation can reproduce and extend the physics of a real material.
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Ytterbium Rydberg pairs naturally realize strongly anisotropic XXZ spin interactions that can be tuned by a magnetic field.
A 50-qubit quantum processor produces dynamical structure factors for KCuF3 that quantitatively match neutron-scattering measurements of its spinon spectrum.
Landau theory applied to the ferromagnetic Dicke-Ising model captures a tricritical point between second- and first-order transitions driven by virtual nearest-neighbor double spin-flip processes, establishing the model as a platform for quantum criticality above the upper critical dimension.
Literary texts are turned into graphs for neutral-atom quantum processors, with a new rigidity metric distinguishing structural uniqueness and a QOuLiPo corpus of engineered texts created to match hardware-native graphs.
Random global pulses in Rydberg chains generate states with Haar-like statistics at long times for weak interactions, while optimal control prepares generic symmetric states with infidelities from 10^{-5} to 3e-2 for 9 spins, worsening with entanglement entropy.
citing papers explorer
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Quantum Spin Liquid State of a Dual-Species Atomic Array on Kagome Lattice
Simulations of 21-30 Rb-Cs atoms on a Kagome lattice find a 1/4 Rydberg-density window with positive topological entropy, interpreted as a quantum spin liquid phase.
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Magnetic-field control of interactions in alkaline-earth Rydberg atoms and applications to {\it XXZ} models
Ytterbium Rydberg pairs naturally realize strongly anisotropic XXZ spin interactions that can be tuned by a magnetic field.
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Benchmarking quantum simulation with neutron-scattering experiments
A 50-qubit quantum processor produces dynamical structure factors for KCuF3 that quantitatively match neutron-scattering measurements of its spinon spectrum.
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Quantum criticality of the ferromagnetic Dicke-Ising model
Landau theory applied to the ferromagnetic Dicke-Ising model captures a tricritical point between second- and first-order transitions driven by virtual nearest-neighbor double spin-flip processes, establishing the model as a platform for quantum criticality above the upper critical dimension.
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QOuLiPo: What a quantum computer sees when it reads a book
Literary texts are turned into graphs for neutral-atom quantum processors, with a new rigidity metric distinguishing structural uniqueness and a QOuLiPo corpus of engineered texts created to match hardware-native graphs.
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Random-State Generation and Preparation Complexity in Rydberg Atom Arrays
Random global pulses in Rydberg chains generate states with Haar-like statistics at long times for weak interactions, while optimal control prepares generic symmetric states with infidelities from 10^{-5} to 3e-2 for 9 spins, worsening with entanglement entropy.