Magnetic interactions could point to miniaturizable quantum devices.
From MRI machines to computer hard disk storage, magnetism has played a role in pivotal discoveries that reshape our society. In the new field of quantum computing, magnetic interactions could play a role in relaying quantum information.
In new research from the U.S. Department of Energy's (DOE) Argonne National Laboratory, scientists have achieved efficient quantum coupling between two distant magnetic devices, which can host a certain type of magnetic excitations called magnons. These excitations happen when an electric current generates a magnetic field. Coupling allows magnons to exchange energy and information. This kind of coupling may be useful for creating new quantum information technology devices.
"Remote coupling of magnons is the first step, or almost a prerequisite, for doing quantum work with magnetic systems," said Argonne senior scientist Valentine Novosad, an author of the study. "We show the ability for these magnons to communicate instantly with each other at a distance."
This instant communication does not require sending a message between magnons limited by the speed of light. It is analogous to what physicists call quantum entanglement.
To read more, click here.