One-to-one quantum simulation of a frustrated magnet with 256 qubits
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. 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.
Cite
@article{arxiv.2603.20372,
title = {One-to-one quantum simulation of a frustrated magnet with 256 qubits},
author = {Lucas Leclerc and Sergi Julià-Farré and Gabriel Silva Freitas and Guillaume Villaret and Boris Albrecht and Lucas Béguin and Lilian Bourachot and Clémence Briosne-Frejaville and Dorian Claveau and Antoine Cornillot and Julius de Hond and Djibril Diallo and Clément Dupays and Robin Dupont and Thomas Eritzpokhoff and Emmanuel Gottlob and Loïc Henriet and Michael Kaicher and Lucas Lassablière and Arvid Lindberg and Yohann Machu and Hadriel Mamann and Thomas Pansiot and Julien Ripoll and Eun Sang Choi and Adrien Signoles and Joseph Vovrosh and Bruno Ximenez and Vivien Zapf and Shengzhi Zhang and Haidong Zhou and Minseong Lee and Tiagos Mendes-Santos and Constantin Dalyac and Antoine Browaeys and Alexandre Dauphin},
journal= {arXiv preprint arXiv:2603.20372},
year = {2026}
}
Comments
20 pages, 15 figures