Photo-Carnot engine

Photo-Carnot engine

A Photo-Carnot engine is a Carnot cycle engine in which the working medium is a photon inside a cavity with perfectly reflecting walls. Radiation is the working fluid, and the piston is driven by radiation pressure.

A quantum Carnot engine is one in which the atoms in the heat bath are given a small bit of quantum coherence. The phase of the atomic coherence provides a new control parameter. [cite web
url=http://www.sciencemag.org/cgi/content/abstract/299/5608/862|title=Extracting Work from a Single Heat Bath via Vanishing Quantum Coherence -- Scully et al. 299 (5608): 862 -- Science|publisher=www.sciencemag.org|accessdate=2008-06-18]

The deep physics behind the second law of thermodynamics is not violated; nevertheless, the quantum Carnot engine has certain features that are not possible in a classical engine.

ee also

*Carnot heat engine
*Radiometer

Footnotes

Further reading

*cite journal|url=http://www.sciencemag.org/cgi/content/abstract/299/5608/862|title=Extracting Work from a Single Heat Bath via Vanishing Quantum Coherence|author=Marlan O. Scully, et al.|journal=Science|date=2003-02-07|volume=299|issue=5608|pages=862–864|doi=10.1126/science.1078955
*cite conference|url=http://adsabs.harvard.edu/abs/2002AIPC..643...92Z|title=The Photo-Carnot Cycle: The Preparation Energy for Atomic Coherence|author=Zubairy, M. Suhail|booktitle=QUANTUM LIMITS TO THE SECOND LAW: First International Conference on Quantum Limits to the Second Law. AIP Conference Proceedings|volume=643|pages=92–97|date=2002|doi=10.1063/1.1523787


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Engine — This article is about a machine to convert energy into useful mechanical motion. For other uses of engine, see Engine (disambiguation). For other uses of motor, see Motor (disambiguation). A V6 internal combustion engine from a Mercedes car An… …   Wikipedia

  • Stirling engine — Alpha type Stirling engine. There are two cylinders. The expansion cylinder (red) is maintained at a high temperature while the compression cylinder (blue) is cooled. The passage between the two cylinders contains the regenerator …   Wikipedia

  • Heat engine — Thermodynamics …   Wikipedia

  • Diesel engine — Diesel engines in a museum Diesel generator on an oil tanker …   Wikipedia

  • Rocket engine — RS 68 being tested at NASA s Stennis Space Center. The nearly transparent exhaust is due to this engine s exhaust being mostly superheated steam (water vapor from its propellants, hydrogen and oxygen) …   Wikipedia

  • Jet engine — For a general overview of aircraft engines, see Aircraft engine. A Pratt Whitney F100 turbofan engine for the …   Wikipedia

  • Swashplate engine — Almen A 4 barrel engine A swashplate engine, also called a barrel engine, is one type of axial engine. Swashplate engines are a type of reciprocating engine that replaces the common crankshaft with a circular swashplate which rotates. The key… …   Wikipedia

  • Bore (engine) — Bore is the diameter measurement of the cylinders in a piston engine. Engine displacement is calculated by: The term bore can also be applied to the bore of a locomotive cylinder. See also Stroke (engine) Compression ratio Cylinder head porting… …   Wikipedia

  • Marine automobile engine — Volkswagen Marine 3.0 litre V6 TDI 265 6 marine engine. This is a marine modified version of Volkswagen Groups 3.0 V6 24v TDI CR automobile engine. Marine automobile engines are types of automobile petrol or diesel engines that have been… …   Wikipedia

  • Malone engine — The Malone engine is a liquid based engine invented by J.F.J Malone of Newcastle, England.[1] The engine used high temperature water as its working fluid, and was therefore also referred to as the Hot Water Engine. Malone s first 50 hp prototype… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”