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Physics

Quantum batteries could give off more energy than they store

Simulations suggest that when a quantum battery shares a quantum state with the device it is powering, the device can gain more charge than was stored in the battery to begin with

By Karmela Padavic-Callaghan

29 October 2024

Quantum batteries could produce a counterintuitive amount of charge

Da-kuk/Getty Images

A device connected to a quantum battery can gain more charge than the battery loses, if they are specially correlated. Understanding how this works could help us learn how to more efficiently power devices like quantum sensors and quantum computers.

Read more

Mystery of the quantum lentils: Are legumes exchanging secret signals?

“If [a battery and a device] have some information about each other, if they are correlated, then sometimes your device will be able to get more than the battery gives,” says Karen Hovhannisyan at the…

Article amended on 31 October 2024

We clarified that the batteries store energy

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