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A quantum simulator mimics a real magnet ⚡ экспресс

Original: "One-to-one quantum simulation of a frustrated magnet with 256 qubits"
arXiv:2603.20372 · 2026-03-20 · CC BY · ⏱ 1 min · Quantum Physics Materials
Scientists have made a quantum simulator precisely replicate the behavior of an exotic magnetic material.
Abstract

Analog quantum simulators are usually tested on ideal models, but in this work, a 256-qubit simulator based on Rydberg atoms reproduced, for the first time, the properties of a real material—the frustrated magnet TmMgGaO₄. The magnetization curves matched experimental data, and snapshot analysis of quantum states showed that the intermediate paramagnetic state is governed by quantum fluctuations rather than disorder. Fun fact: this 'indecisiveness' of spins is like a traffic jam at an intersection where every driver waits for the other to move. Finally, the simulator peered into the nonequilibrium dynamics after a sudden jolt—a regime inaccessible to classical computers due to the rapid growth of entanglement.

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A three-seat swing never stops: one rider is always left hanging. That’s a frustrated magnet—a perpetual dance with no rest. To study it, physicists built a quantum simulator from 256 atoms, meticulously mimicking the crystal TmMgGaO₄.

The idea of simulators was proposed back in the 1980s by Richard Feynman: complex quantum systems are easier to model quantumly than to compute on ordinary computers.

The simulator showed the same magnetic behavior as the real material. But the big surprise—in the twilight zone between order and chaos, it’s not crystal defects but quantum jitters that rule. Moreover, when the simulator was given a sudden jolt, it evened out its temperature in trillionths of a second. This process comes with an explosive growth of entanglement—and just as dramatically, entropy surged.

The avalanche of entanglement resembles the expansion of the early universe: particles 'remember' each other across ever-growing distances.

So this quantum doppelgänger doesn’t just copy reality—it peers into its most fleeting moments, where ordinary computers are powerless.

🎯 The natural mineral Herbstite is a real frustrated magnet: when cooled, its magnetic moments flow like a liquid even though the crystal stays solid.

Scientists
Adam RiessBrian SchmidtEdwin HubbleGeorges LemaîtreMaarten SchmidtSaul Perlmutter
Tags
entropy spectroscopy expansion of the universe
Laws
Hubble's lawsecond law of thermodynamicsDoppler effectBekenstein-Hawking entropyMaxwell's equationsPlanck's law
Original: arXiv:2603.20372 · CC BY · bridge42worlds