155 citations · 720 across the 34 of their papers we have counts for
27 papers · 1 filter
Beyond low-dissipation regime: general condition for Curzon-Ahlborn efficiency
Yuki Izumida
In recent years, physicists have extensively investigated the universality of Curzon-Ahlborn (CA) efficiency as the efficiency at maximum power of heat engines, which, like Carnot…
Irreversibility of many-body harmonic oscillators characterized by generalized Husimi's adiabaticity parameter
Kyosuke Watanabe, Yuki Izumida
In a classical paper [K. Husimi, Prog. Theor. Phys. 9, 381 (1953)], Husimi showed that, for a single harmonic oscillator with a time-dependent angular frequency and initial conditi…
Universal Thermodynamic Law Governing Stochastic Pendulum Clocks
Yuki Izumida
Clocks' performance, especially their precision, is fundamentally limited by thermodynamic laws as they are physical devices. Yet, it is known that the established thermodynamic un…
Irreversibility of the pendulum revisited from Husimi's adiabaticity parameter
Yuki Izumida
We revisit the irreversibility of the pendulum with time-dependent angular frequency, considered in a classical paper by K. Husimi. He introduced a parameter that measures the adia…
Nonlinear refrigerator with a finite-sized cold heat bath
I. Iyyappan, Yuki Izumida, Sibasish Ghosh
We study the refrigerator working between a finite-sized cold heat bath and an infinite-sized hot heat bath (environment) in the nonlinear response regime. We assume that the initi…
Nonequilibrium thermodynamics of populations of weakly-coupled low-temperature-differential Stirling engines with synchronous and asynchronous transitions
Songhao Yin, Hiroshi Kori, Yuki Izumida
This study developed the theory of nonequilibrium thermodynamics for populations of low-temperature-differential (LTD) Stirling engines weakly-coupled in a general class of network…
Formulation of Entropy through Work by Carnot Machine and Direct Derivation of Law of Entropy Non-Decrease from Kelvin-Planck Principle
Yuki Izumida
We derive the law of entropy non-decrease directly from the Kelvin-Planck principle for simple and compound systems without using the Clausius inequality. A key of the derivation i…
Decomposition of metric tensor in thermodynamic geometry in terms of relaxation timescales
Zhen Li, Yuki Izumida
Geometrical methods are extensively applied to thermodynamics including stochastic thermodynamics. In the case of slow-driving linear response regime, a geometrical framework, know…
Non-unique detailed constructions of Curzon-Ahlborn cycle on thermodynamic plane
Yuki Izumida
The Curzon-Ahlborn (CA) cycle is a paradigmatic model of endoreversible heat engines, which yields the so-called CA efficiency as the efficiency at maximum power. Due to the arbitr…
Non-quasistatic response coefficients and dissipated availability for macroscopic thermodynamic systems
Yuki Izumida
The characterization of finite-time thermodynamic processes is of crucial importance for extending equilibrium thermodynamics to nonequilibrium thermodynamics. The central issue is…
Irreversible efficiency and Carnot theorem for heat engines operating with multiple heat baths in linear response regime
Yuki Izumida
The Carnot theorem, one expression of the second law of thermodynamics, places a fundamental upper bound on the efficiency of heat engines operating between two heat baths. The Car…
Achieving Carnot efficiency in a finite-power Brownian Carnot cycle with arbitrary temperature difference
Kosuke Miura, Yuki Izumida, Koji Okuda
Achieving the Carnot efficiency at finite power is a challenging problem in heat engines due to the trade-off relation between efficiency and power that holds for general heat engi…
Hierarchical Onsager symmetries in adiabatically driven linear irreversible heat engines
Yuki Izumida
In existing linear response theories for adiabatically driven cyclic heat engines, Onsager symmetry is identified only phenomenologically, and a relation between global and local O…
Compatibility of Carnot efficiency with finite power in an underdamped Brownian Carnot cycle in small temperature-difference regime
Kosuke Miura, Yuki Izumida, Koji Okuda
We study the possibility of achieving the Carnot efficiency in a finite-power underdamped Brownian Carnot cycle. Recently, it was reported that the Carnot efficiency is achievable…
Quasi-linear irreversible thermodynamics of a low-temperature-differential kinematic Stirling heat engine
Yuki Izumida
Low-temperature-differential (LTD) Stirling heat engines are able to operate with a small temperature difference between low-temperature heat reservoirs that exist in our daily liv…
Fast forward approach to stochastic heat engine
Katsuhiro Nakamura, Jasur Matrasulov, Yuki Izumida
The fast-forward (FF) scheme proposed by Masuda and Nakamura (\textit{Proc. R. Soc. A} \textbf{466}, 1135 (2010)) in the context of conservative quantum dynamics can reproduce a qu…
Experimental characterization of autonomous heat engine based on minimal dynamical-system model
Shoichi Toyabe, Yuki Izumida
The autonomous heat engine is a model system of autonomous nonequilibrium systems like biological cells, exploiting nonequilibrium flow for operations. As the Carnot engine has ess…
Nonlinear dynamics analysis of a low-temperature-differential kinematic Stirling heat engine
Yuki Izumida
The low-temperature-differential (LTD) Stirling heat engine technology constitutes one of the important sustainable energy technologies. The basic question of how the rotational mo…
Molecular kinetic analysis of a local equilibrium Carnot cycle
Yuki Izumida, Koji Okuda
We identify a velocity distribution function of ideal gas particles that is compatible with the local equilibrium assumption and the fundamental thermodynamic relation satisfying t…
Linear irreversible heat engines based on the local equilibrium assumptions
Yuki Izumida, Koji Okuda
We formulate an endoreversible finite-time Carnot cycle model based on the assumptions of local equilibrium and constant energy flux, where the efficiency and the power are express…
Heat devices in nonlinear irreversible thermodynamics
Y. Izumida, K. Okuda, J. M. M. Roco +1
We present results obtained by using nonlinear irreversible models for heat devices. In particular, we focus on the global performance characteristics, the maximum efficiency and t…
Work Output and Efficiency at Maximum Power of Linear Irreversible Heat Engines Operating with a Finite-Sized Heat Source
Yuki Izumida, Koji Okuda
We formulate the work output and efficiency for linear irreversible heat engines working between a finite-sized hot heat source and an infinite-sized cold heat reservoir until the…
Coefficient of performance under optimized figure of merit in minimally nonlinear irreversible refrigerator
Y. Izumida, K. Okuda, A. Calvo Hernández +1
We apply the model of minimally nonlinear irreversible heat engines developed by Izumida and Okuda [EPL {\bf 97}, 10004 (2012)] to refrigerators. The model assumes extended Onsager…
Efficiency at maximum power of minimally nonlinear irreversible heat engines
Yuki Izumida, Koji Okuda
We propose the minimally nonlinear irreversible heat engine as a new general theoretical model to study the efficiency at the maximum power of heat engines operating between…