Quantum Computer Reveals Hidden Electron Pairs in Materials ⚡ экспресс
The Fermi-Hubbard model serves as a starting point for simulating many strongly correlated materials, including high-temperature superconductors. Detecting superconducting pairing correlations long remained out of reach due to their off-diagonal nature, which precludes local density measurements, and the challenge of preparing superconducting states. On the Quantinuum Helios trapped-ion quantum computer, significant pairing correlations were measured in three regimes of the Fermi-Hubbard model. Namely: nonequilibrium pairing induced by an electromagnetic field on a half-filled square lattice; d-wave pairing in the approximate ground state of the checkerboard model at 1/6 doping; and s-wave pairing in a bilayer model relevant to nickelate superconductors. These results demonstrate that a quantum computer can reliably create and probe physically meaningful states with superconducting correlations, paving the way to studying superconductivity through quantum computation.
Ordinary wires: electrons jostle, lose energy, and heat up—that's resistance. In superconductors, some electrons pair up in sync, like dancers swirling without collisions. But these pairs hide: you can't see them directly, only infer their presence from flawless coordination.
Scientists used an analog of spectroscopy (a method that identifies substances by their light 'fingerprint') on the quantum computer. The machine simulated the standard model of a material, named after Enrico Fermi, and acted like a camera revealing the hidden dancing pairs. As the model cooled, entropy (a measure of disorder) dropped, and the pairs became clear.
This is a step toward superconductivity without deep cold. Losses in wires will vanish, levitating trains will appear, and medical scanners will become cheaper.
🎯 Quantum computers were originally conceived as simulators of quantum systems. Back in the 1980s, [scientist:Richard Feynman]Richard Feynman[/scientist] argued that we need quantum devices for such tasks.
🎬 In the sci-fi movie Avatar, they mine unobtanium—a room-temperature superconductor that enables incredible technologies.