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- Yukawa Satoshi
- Department of Applied Physics, The University of Tokyo, Tokyo 113
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- Kikuchi Macoto
- Department of Physics, Osaka University, Toyonaka 560
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- Tatara Gen
- Department of Earth and Space Science, Osaka University, Toyonaka 560
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- Matsukawa Hiroshi
- Department of Physics, Osaka University, Toyonaka 560
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抄録
The concept of thermal ratchets is extended to the system governed by quantum mechanics. We study a tight-binding model with an asymmetric periodic potential contacting with a heat bath under an external oscillating field as a specific example of quantum ratchet. The dynamics of a density operator of this system are studied numerically using the quantum Liouville equation. The finite net current is found in the nonequilibrium steady state, which originates from purely quantum mechanical effects. The direction of the current varies with parameters, in contrast with the classical thermal ratchets.
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 66 (10), 2953-2956, 1997
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390001204181456896
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- NII論文ID
- 210000100387
- 110001970205
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- NII書誌ID
- AA00704814
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- BIBCODE
- 1997JPSJ...66.2953Y
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- ISSN
- 13474073
- 00319015
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- MRID
- 1488852
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- NDL書誌ID
- 4337778
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可