Quantum physicists chart a century of spin control

Researchers have developed ways to control particle spin using carefully shaped electromagnetic pulses. The methods underpin MRI and NMR, and optimal control theory could help improve both technologies.

Phys.org has reported:

Quantum physicists have traced how researchers learned to control particle spin over the past century, using precisely shaped electromagnetic pulses. Spin is a quantum mechanical property with no direct counterpart in everyday experience.

The ability to manipulate spin has led to two widely used technologies: magnetic resonance imaging (MRI), common in hospitals, and nuclear magnetic resonance spectroscopy (NMR). NMR helps determine protein structures and support the development of new drugs.

Researchers can use the mathematical framework of optimal control theory to improve both technologies. The source provided no named researchers, publication date, location or direct quotes.