| 自旋系统量子热机循环 |
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| 引用本文： | 何济洲,伍歆,欧阳微频. 自旋系统量子热机循环[J]. 应用科学学报, 2006, 24(4): 419-423 |
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| 作者姓名： | 何济洲 伍歆 欧阳微频 |
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| 作者单位： | 南昌大学物理系, 江西南昌 330047 |
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| 基金项目： | 国家自然科学基金;江西省自然科学基金 |
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| 摘 要： | 建立了一种以无相互作用的自旋系统为工质的量子热机循环模型,基于量子主方程和半群方法,分析了循环的性能特征及其时间演化公式,推导出效率和输出功率的一般表达式,在高温极限下详细推导出它们的具体优化特征.从微观上分析了热机循环的性能优化.
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| 关 键 词： | 自旋系统 性能分析 量子热机循环 |
| 文章编号： | 0255-8297（2006）04-0419-05 |
| 收稿时间： | 2005-04-27 |
| 修稿时间： | 2005-04-272005-07-29 |
Quantum Heat Engine Cycle Working with Spin System |
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| HE Ji-zhou,WU Xin,OUYANG Wei-ping. Quantum Heat Engine Cycle Working with Spin System[J]. Journal of Applied Sciences, 2006, 24(4): 419-423 |
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| Authors: | HE Ji-zhou WU Xin OUYANG Wei-ping |
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| Affiliation: | Department of Physics, Nanchang University, Nanchang 330047, China |
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| Abstract: | A new model of a quantum heat engine cycle is established in which the working substance consists of many non-interacting spin-1/2 systems.Performance characteristics of the cycle and time evolution of the spin angular momentum are investigated,based on the quantum master equation and a semi-group approach.The general expressions of efficiency and power output are derived.Further,at high temperatures the optimal relations of efficiency and power output are studied in detail.Optimal performance of heat engine cycles is analyzed from a microscopic model. |
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| Keywords: | spin systems quantum heat engine cycle performance analysis |
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