Quantum Ratchets

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概要

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• The concept of thermal ratchets is extended to the system governed by qtrantutn mechanics. Westudy a tight-binding model with an asyrnrnetric periodic potential contacting with a heat bathunder an external oscillating field as a specific example of quantvrm ratchet. The dynarnics of' adensity operator of this systern are stttdied ntrmerically tmsing the quantum Liouville equation.The finite net current is found in the nonequilibriumaa steady state, which originates from jcurelyqttanttrna rnechanical effects. The direction of tlae current varies with pararneters, in contrastwith the classical thernaaJ ratchets.

• 社団法人日本物理学会の論文
• 1997-10-15

著者

• Tatara Gen

  Department Of Earth And Space Science Osaka University

• Kikuchi Makoto

  Department Of Applied Physics Faculty Of Technology Tohoku Gakuin University

• Yukawa Satoshi

  Department Of Applied Physics Graduate School Of Engineering The University Of Tokyo:department Of E

• Kikuchi Macoto

  Department Of Physice Graduate School Of Science Osaka University

• MATUKAWA Hiroshi

  Department of Physics,Osaka University

• Matukawa Hiroshi

  Department Of Physics Osaka University

• YUKAWA Satoshi

  Department of Applied Physics,Osaka University

• TATARA Gen

  Department of Earth and Space Science,Osaka University

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