Non-thermal ultrafast laser pulses directly control/ change antiferromagnetic insulator's magnetic state generating near-zero heat

https://phys.org/news/2026-07-optical-antiferromagnets-storage-devices-energy.html

"antiferromagnets stable/ THz speed, but lack net magnetization making control difficult without heavy external magnetic fields... overcome utilizing intense femtosecond laser pulses' momentum/ propagation direction rather than light polarization to manipulate... links fiber-optic communications directly with storage, eliminating intermediate step converting optical data to electrical signals before writing to disk... 1,000's times faster hard drives/ non-volatile memory for data centers generating near-zero heat"