Nonvolatile quantum memory: Discovery points path to flash-like memory for storing qubits

https://phys.org/news/2024-04-nonvolatile-quantum-memory-discovery-path.html

"heat toggles iron, germanium and tellurium crystal between 2 electronic phases, each producing topologically protected quantum states, reducing decoherence-related errors... reheat and cool for either longer or shorter time period to switch phases... did not need melting and re-crystallization to change phases... vacancy order controlling lattice symmetry electronic topology... design, control topology through cooperation of strong correlations and space group symmetry"