Quantum coherence and Carnot engines

Physica E: Low-Dimensional Systems and Nanostructures

Volumn 29, Issue 1-2, 2005, Pages 289-296

  Schulman, L S ^a   Gaveau, B ^b  

^a CLARKSON UNIVERSITY   (United States)

^b Laboratoire Analyse et Physique Mathematique   (France)

Author keywords

Carnot cycle; Coherence; Entanglement; Entropy; Information

Indexed keywords

CARNOT CYCLE; ENTROPY; HEAT ENGINES; THERMODYNAMICS;

DECOHERENCE; ENTANGLEMENT; INFORMATION; QUANTUM COHERENCE;

QUANTUM THEORY;

EID: 25644436951     PISSN: 13869477     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.physe.2005.05.026     Document Type: Conference Paper

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11. In fact Scully goes a step further and considers this photon to be virtual in the sense that no "measurement" is performed in the course of a cycle of his engine. So the work "performed" is a change in the state of the maser cavity.
12. For Scully [1] this is the Stern-Gerlach apparatus and the P / M label characterizes the position-space path taken by the atom. Our notation, S, is intended to suggest "Stern-Gerlach-Maxwell-Demon."
13. If the purifying is done on a collection of physical particles (not on an abstract ensemble), the measurement is "weak" and will convey less individual information. By this procedure, a substantial level of coherence can survive.
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