Maxwell’s demon charges quantum batteries inside of a quantum computer

Splitting qubits inside a quantum computer into high and low-energy groups can charge a battery

Shutterstock / Pavel Chukhov

A 19th-century thought experiment, considered for decades to break the laws of thermodynamics, has been brought to life inside a quantum computer and used to charge a quantum battery.

Physicist James Clerk Maxwell imagined his demon in 1867 while thinking about how to cheat the laws of thermodynamics. He considered two boxes of gas separated by a weightless door and a tiny demon that controls which particles can go through it. The demon uses this control to make one box hotter…


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