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The thermodynamic uncertainty relation provides an inequality relating any mean current, the associated dispersion and the entropy production rate for arbitrary non-equilibrium steady states. Applying it here to a general model of a…

统计力学 · 物理学 2017-01-05 Patrick Pietzonka , Andre C. Barato , Udo Seifert

We present a unified perspective on nonequilibrium heat engines by generalizing nonlinear irreversible thermodynamics. For tight-coupling heat engines, a generic constitutive relation of nonlinear response accurate up to the quadratic order…

统计力学 · 物理学 2015-03-06 Shiqi Sheng , Z. C. Tu

The quest to identify the best heat engine has been at the center of science and technology. Thermoelectric nanoscale heat engines convert heat flows into useful work in the form of electrical power and promise the realization of on-chip…

统计力学 · 物理学 2021-03-11 Yuto Ashida , Takahiro Sagawa

Thermoelectric generators are particularly suitable to investigate the irreversible processes which govern the coupled transport of matter and heat in solid-state systems. We study the efficiency at maximum power in the strong coupling…

统计力学 · 物理学 2012-03-16 Y. Apertet , H. Ouerdane , C. Goupil , Ph. Lecoeur

We study the energestics of a thermal motor driven by temperature differences, which consists of Brownian particles moving in a sawtooth potential with an external load where the viscous medium is alternately in contact with hot and cold…

生物物理 · 物理学 2009-11-11 Baoquan Ai , Liqiu Wang , Huizhang Xie , Lianggang Liu

In this work we present a detailed study and derivation of the thermopower and thermoelectric coefficient of nano-granular metals at large tunneling conductance between the grains, g_T>> 1. An important criterion for the performance of a…

介观与纳米尺度物理 · 物理学 2015-05-13 Andreas Glatz , I. S. Beloborodov

We note that, in extended phase space the cosmological constant is a thermodynamic variable. In this paper, this cosmological constant lead us to consider a black hole as a heat engine. So, here we take advantage from holographic heat…

高能物理 - 理论 · 物理学 2017-10-31 Kh. Jafarzade , J. Sadeghi

The energy efficiency and power of a three-terminal thermoelectric nanodevice are studied by considering elastic tunneling through a single quantum dot. Facilitated by the three-terminal geometry, the nanodevice is able to generate…

介观与纳米尺度物理 · 物理学 2017-08-22 Jincheng Lu , Rongqian Wang , Yefeng Liu , Jian-Hua Jiang

A major limitations for many heat engines is that their functioning demands on-line control, and/or an external fitting between environmental parameters (e.g. temperatures of thermal baths) and internal parameters of the engine. We study a…

统计力学 · 物理学 2016-07-20 A. E. Allahverdyan , S. G. Babajanyan , N. H. Martirosyan , A. V. Melkikh

Critical thermoelectric parameters including Seebeck coefficient, electrical conductivity, thermal conductivity and figure of merit ZT of one-dimensional coaxial Bi2Te3/Sb2Te3 nanocomposite were modeled by following the single carrier…

材料科学 · 物理学 2011-01-31 Qilin Gu

We study the extended thermodynamical properties of the charged black hole in Horndeski model with the $k$-essence sector. Then we define a holographic heat engine via the black hole. We compute the engine efficiency in the large…

高能物理 - 理论 · 物理学 2019-01-15 Shi-Qian Hu , Xiao-Mei Kuang

A heat engine is a machine which uses the temperature difference between a hot and a cold reservoir to extract work. Here both reservoirs are quantum systems and a heat engine is described by a unitary transformation which decreases the…

量子物理 · 物理学 2009-11-11 Dominik Janzing

Carnot efficiency sets a fundamental upper bound on the heat engine efficiency, attainable in the quasi-static limit, albeit at the cost of completely sacrificing power output. In this Letter, we present a minimal heat engine model that can…

统计力学 · 物理学 2025-01-17 Shiling Liang , Yu-Han Ma , Daniel Maria Busiello , Paolo De Los Rios

We show that coherent electron transport through zero-dimensional systems can be used to tailor the shape of the system's transmission function. This quantum-engineering approach can be used to enhance the performance of quantum dots or…

介观与纳米尺度物理 · 物理学 2011-10-10 Olov Karlstrom , Heiner Linke , Gunnar Karlstrom , Andreas Wacker

We theoretically show how structural modifications and controlling quantum coherency can enhance linear and nonlinear thermoelectric performance in graphene nanostructure heat engines. Although graphene has emerged as a promising material…

介观与纳米尺度物理 · 物理学 2024-05-24 Yuga Kodama , Nobuhiko Taniguchi

Thermostatics of CARNOT engines has been extended by more recent research based on endo-reversible model. Our model assumes exo-reversibility but endo-irreversibility to determine new upper-bound to thermomechanical conversion. We propose a…

经典物理 · 物理学 2021-07-07 Michel Feidt , Renaud Feidt

Theoretical analysis of the effect of thermoelectric phenomena on the relation of effective electrical and thermal conductivity in the macroscopically inhomogeneous media is carried out. Plane-layered structures, two-dimensional self-dual…

材料科学 · 物理学 2011-09-09 A. A. Snarskii , M. I. Zhenirovskii , I. V. Bezsudnov

The widely debated feasibility of thermodynamic machines achieving Carnot efficiency at finite power has been convincingly dismissed. Yet, the common wisdom that efficiency can only be optimal in the limit of infinitely-slow processes…

统计力学 · 物理学 2017-07-28 Matteo Polettini , Massimiliano Esposito

We consider a three-stroke engine in the microscopic regime, where the working body of the engine is composed of a two-level system. The working body of the engine aims to withdraw heat from the hot heat bath, generate work, and discharge…

量子物理 · 物理学 2024-10-01 Tanmoy Biswas , Chandan Datta

In the past, a number of heat engine models have been devised to apply the principles of thermodynamics to a laser. The best one known is the model using a negative temperature to describe population inversion. In this paper, we present a…

光学 · 物理学 2021-04-16 Peter Muys