The harmonic quantum Szilárd engine
作者:
P. C. W. Davies,
Logan Thomas,
George Zahariade,
期刊:
American Journal of Physics
(AIP Available online 2021)
卷期:
Volume 89,
issue 12
页码: 1123-1131
ISSN:0002-9505
年代: 2021
DOI:10.1119/10.0005946
出版商: American Association of Physics Teachers
数据来源: AIP
摘要:
The Szilárd engine is a mechanism (akin to Maxwell's demon) for converting information into energy, which seemingly violates the second law of thermodynamics. Originally a classical thought experiment, it was extended to a quantized treatment by Zurek. Here, we examine a new, elegant model of a quantum Szilárd engine by replacing the traditional rigid box with a harmonic potential, extending the scope of the model. Remarkably, almost all calculations are exact. This article is suitable for students, researchers, and educators interested in the conceptual links among information, entropy, and quantum measurement.
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