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arXiv 1708.00263quant-phcond-mat.stat-mech
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非理想循环对量子热机效率的影响

Impact of nonideal cycles on the efficiency of quantum heat engines

Mehdi Ramezani, Stefano Marcantoni, Fabio Benatti, Roberto Floreanini, Francesco Petiziol, Ali T. Rezakhani, Mehdi Golshani

摘要:

给定一个量子热机,在一个循环中工作,对于工作物质的含时哈密顿量H(t)达到最大效率,并且总的可控驱动H(t)= g(t)H,我们研究了由于哈密顿量中的一般的与时间无关的扰动而导致的效率与最优值的偏差。我们表明,对于一个工作物质组成的两个两级系统,通过适当地调整的相互作用,偏差可以被抑制到三阶的扰动参数,从而几乎保持发动机的最优性。

英文摘要:

Given a quantum heat engine that operates in a cycle that reaches maximal efficiency for a time-dependent Hamiltonian H(t) of the working substance, with overall controllable driving H(t) = g(t) H, we study the deviation of the efficiency from the optimal value due to a generic time-independent perturbation in the Hamiltonian. We show that for a working substance consisting of two two-level systems, by suitably tuning the interaction, the deviation can be suppressed up to the third order in the perturbation parameter-and thus almost retaining the optimality of the engine.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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