IBM quantum computer matches lab data in materials simulation

11:20

IBM announced Thursday its quantum computer accurately simulated a real magnetic material's behavior. Results matched neutron scattering experiments from national labs. Researchers once deemed this beyond current quantum hardware. The breakthrough advances quantum computing as a practical tool for scientific discovery.

The study targeted potassium copper fluoride (KCuF₃), a well-characterized magnetic crystal. Teams from the US Department of Energy-funded Quantum Science Center at Oak Ridge National Laboratory, Purdue University, University of Illinois Urbana-Champaign, Los Alamos National Laboratory, University of Tennessee, and IBM compared quantum simulations directly to neutron scattering data. This standard technique probes quantum material properties.

"There is vast neutron scattering data on magnetic materials we don't fully understand due to classical method limits," said Purdue physics professor Arnab Banerjee. "Using quantum computers to better interpret these simulations against experimental data has been my dream for ten years. We're thrilled to demonstrate it works."

Allen Scheie, Los Alamos condensed matter physicist, called it "the most striking match I've seen between experimental data and qubit simulation." He said it "undeniably raises the bar for quantum computer expectations."

Lower two-qubit gate error rates on IBM processors, new algorithms, and quantum-centric supercomputing workflows enabled precision. These blend quantum and classical resources. "These results became possible through two-qubit gate error rates now accessible on our quantum processors," said IBM principal research scientist Abhinav Kandala.

The team extended the approach beyond KCuF₃ to materials with more complex interactions using universal quantum processor programmability.

IBM aims to make quantum computing viable for chemistry, materials science, and molecular biology. Earlier this month, it unveiled a quantum-centric supercomputing reference architecture. Early March saw an international IBM-involved team publish the first quantum simulation of a semi-Möbius molecule in Science. Oak Ridge Quantum Science Center director Travis Humble called the materials work "a major demonstration of quantum computing's impact on scientific discovery workflows." Long-term applications may span superconductors, medical imaging, energy storage, and drug development.