"magnetic couplings" refers to a mechanism that uses magnets to transfer energy or torque from one rotating component to another without physical contact. It allows separate parts to connect and transmit power through the force of magnets rather than direct physical contact.
Full definition
Many of the best cheap watches incorporate
magnetic couplings in order to replenish the charge, so there's no wire to fish out and use.
But I wouldn't be surprised if some Smart Alexa doesn't come up with a standardized, mechanical or
magnetic coupling device that enables a string of automobiles to travel long distances with a lot less fuel.
Magnetic couplings in a realistic cuprate system have been correctly predicted for the first time with highly accurate Quantum Monte Carlo (QMC) calculations.
Yesilcay and Ziolkowska make such
a magnetic couple that you never question their sudden attraction to each other.
The more reliable solution is
the magnetic coupling, which makes no physical contact, so will never be subject to failing by wear.