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Science 18 January 2002:
Vol. 295. no. 5554, p. 425
DOI: 10.1126/science.295.5554.425a
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News of the Week

THERMODYNAMICS:
Quantum Engine Blasts Past High Gear

David Voss

The laws of thermodynamics set clear limits on how much work engines can squeeze from a given energy input. But take those classical axioms and add quantum mechanics, and unusual things can happen. A physicist has found that in theory he could take the hot exhaust from one kind of heat engine and drive a laser with it to do more work than classical thermodynamics allows.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)