2016年6月
Coupled-Double-Quantum-Dot Environmental Information Engines: A Numerical Analysis
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- 巻
- 85
- 号
- 6
- 開始ページ
- 064003
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.7566/JPSJ.85.064003
- 出版者・発行元
- PHYSICAL SOC JAPAN
We conduct numerical simulations for an autonomous information engine comprising a set of coupled double quantum dots using a simple model. The steady-state entropy production rate in each component, heat and electron transfer rates are calculated via the probability distribution of the four electronic states from the master transition-rate equations. We define an information-engine efficiency based on the entropy change of the reservoir, implicating power generators that employ the environmental order as a new energy resource. We acquire device-design principles, toward the realization of corresponding practical energy converters, including that (1) higher energy levels of the detector-side reservoir than those of the detector dot provide significantly higher work production rates by faster states' circulation, (2) the efficiency is strongly dependent on the relative temperatures of the detector and system sides and becomes high in a particular Coulomb-interaction strength region between the quantum dots, and (3) the efficiency depends little on the system dot's energy level relative to its reservoir but largely on the antisymmetric relative amplitudes of the electronic tunneling rates.
- リンク情報
- ID情報
-
- DOI : 10.7566/JPSJ.85.064003
- ISSN : 0031-9015
- J-Global ID : 201702203693079473
- Web of Science ID : WOS:000376764700014