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View article: Hamiltonian Heat Baths, Coarse-Graining and Irreversibility: A Microscopic Dynamical Entropy from Classical Mechanics
Hamiltonian Heat Baths, Coarse-Graining and Irreversibility: A Microscopic Dynamical Entropy from Classical Mechanics Open
The Hamiltonian evolution of an isolated classical system is reversible, yet the second law of thermodynamics states that its entropy can only increase. This has confounded attempts to identify a `Microscopic Dynamical Entropy' (MDE), by w…
View article: An ideal entropy transporter with finite power and vanishing fluctuation
An ideal entropy transporter with finite power and vanishing fluctuation Open
We study a micro-magnet that interacts with a spin-polarized electric current, a heat bath, as well as a static magnetic field. The resulting non-equilibrium steady-state transports entropy between the current and the heat bath, without ne…
View article: Stochastic Thermodynamics of Micromagnetics with Spin Torque
Stochastic Thermodynamics of Micromagnetics with Spin Torque Open
In this work, we study the stochastic dynamics of micro-magnetics interacting with a spin-current torque. We extend the previously constructed stochastic Landau-Lifshitz equation to the case with spin-current torque, and verify the conditi…
View article: Stochastic thermodynamics of Brownian motion in a flowing fluid
Stochastic thermodynamics of Brownian motion in a flowing fluid Open
We study stochastic thermodynamics of over-damped Brownian motion in a flowing fluid. Unlike some previous works, we treat the effects of the flow field as a non-conservational driving force acting on the Brownian particle. This allows us …
View article: Stochastic Thermodynamics of Micromagnetics
Stochastic Thermodynamics of Micromagnetics Open
In this work, we study the stochastic thermodynamics of micro-magnetic systems. We first formulate the stochastic dynamics of micro-magnetic systems by incorporating noises into Landau-Lifshitz (LL) equation, which describes the irreversib…
View article: Stochastic thermodynamics of Brownian motion in temperature gradient
Stochastic thermodynamics of Brownian motion in temperature gradient Open
We study stochastic thermodynamics of a Brownian particle which is subjected to a temperature gradient and is confined by an external potential. We first formulate an over-damped Ito-Langevin theory in terms of local temperature, friction …
View article: Stochastic Thermodynamics of Brownian motion in Temperature Gradient
Stochastic Thermodynamics of Brownian motion in Temperature Gradient Open
We study stochastic thermodynamics of a Brownian particle which is subjected to a temperature gradient and is confined by an external potential. We first formulate an over-damped Ito-Langevin theory in terms of local temperature, friction …
View article: Multi-scale projection operator method and coarse-graining of covariant Fokker-Planck theory
Multi-scale projection operator method and coarse-graining of covariant Fokker-Planck theory Open
A multi-scale projection operator method is developed and applied to study coarse-graining of covariant Fokker-Planck theory and the associated Ito-Langevin dynamics. Explicit expressions for the renormalized kinetic coefficients are obtai…
View article: Unified theory of thermodynamics and stochastic thermodynamics for nonlinear Langevin systems driven by non-conservative forces
Unified theory of thermodynamics and stochastic thermodynamics for nonlinear Langevin systems driven by non-conservative forces Open
We construct a unified theory of thermodynamics and stochastic thermodynamics for classical nonequilibrium systems driven by non-conservative forces, using the recently developed covariant Ito-Langevin theory. The thermodynamic forces are …
View article: Covariant nonequilibrium thermodynamics from Ito-Langevin dynamics
Covariant nonequilibrium thermodynamics from Ito-Langevin dynamics Open
Using the recently developed covariant Ito-Langevin dynamics, we develop a nonequilibrium thermodynamic theory for small systems coupled to multiplicative noises. The theory is based on Ito calculus, and is fully covariant under time-indep…
View article: Time-Slicing Path-integral in Curved Space
Time-Slicing Path-integral in Curved Space Open
Path integrals constitute powerful representations for both quantum and stochastic dynamics. Yet despite many decades of intensive studies, there is no consensus on how to formulate them for dynamics in curved space, or how to make them co…
View article: Strong coupling thermodynamics and stochastic thermodynamics from the unifying perspective of time-scale separation
Strong coupling thermodynamics and stochastic thermodynamics from the unifying perspective of time-scale separation Open
Assuming time-scale separation, a simple and unified theory of thermodynamics\nand stochastic thermodynamics is constructed for small classical systems\nstrongly interacting with its environment in a controllable fashion. The total\nHamilt…
View article: Absence of Thermodynamic Uncertainty Relations with Asymmetric Dynamic Protocols
Absence of Thermodynamic Uncertainty Relations with Asymmetric Dynamic Protocols Open
Many versions of Thermodynamic Uncertainty Relations (TUR) have recently been discovered, which impose lower bounds on relative fluctuations of integrated currents in irreversible dissipative processes, and suggest that there may be fundam…
View article: Strong Coupling Thermodynamics and Stochastic Thermodynamics from the Unifying Perspective of Time-Scale Separation
Strong Coupling Thermodynamics and Stochastic Thermodynamics from the Unifying Perspective of Time-Scale Separation Open
Assuming time-scale separation, a simple and unified theory of thermodynamics and stochastic thermodynamics is constructed for small classical systems strongly interacting with its environment in a controllable fashion. The total Hamiltoni…
View article: Evading Thermodynamic Uncertainty Relations via Asymmetric Dynamic Protocols
Evading Thermodynamic Uncertainty Relations via Asymmetric Dynamic Protocols Open
Many versions of Thermodynamic Uncertainty Relations (TUR) have recently been discovered, which impose lower bounds on relative fluctuations of integrated currents in irreversible dissipative processes, and suggest that there may be fundam…
View article: Covariant Non-equilibrium Thermodynamics from Ito-Langevin Dynamics
Covariant Non-equilibrium Thermodynamics from Ito-Langevin Dynamics Open
Using the recently developed covariant Ito-Langevin dynamics, we develop a non-equilibrium thermodynamic theory for small systems coupled to multiplicative noises. The theory is based on Ito-calculus, and is fully covariant under time-inde…
View article: Information swimmer: Self-propulsion without energy dissipation
Information swimmer: Self-propulsion without energy dissipation Open
We study an information-based mechanism of self-propulsion in noisy environment. An information swimmer maintains directional motion by periodically measuring its velocity and accordingly adjusting its friction coefficient. Assuming that t…
View article: Information Swimmer: A Novel Mechanism of Self-propulsion
Information Swimmer: A Novel Mechanism of Self-propulsion Open
We study an information-based mechanism of self-propulsion in noisy environment. An information swimmer maintains directional motion by periodically measuring its velocity and accordingly adjusting its friction coefficient. Assuming that t…
View article: Action Principle and Dynamic Ensemble Theory for Non-equilibrium Markov Chains
Action Principle and Dynamic Ensemble Theory for Non-equilibrium Markov Chains Open
An overarching action principle, the principle of minimal free action, exists for ergodic Markov chain dynamics. Using this principle and the Detailed Fluctuation Theorem, we construct a dynamic ensemble theory for non-equilibrium steady s…
View article: Charged plate in asymmetric electrolytes: One-loop renormalization of surface charge density and Debye length due to ionic correlations
Charged plate in asymmetric electrolytes: One-loop renormalization of surface charge density and Debye length due to ionic correlations Open
Self-consistent field theory (SCFT) is used to study the mean potential near a charged plate inside a m:-n electrolyte. A perturbation series is developed in terms of g=4πκb, where band1/κ are Bjerrum length and bare Debye length, respecti…
View article: Particles inside electrolytes with ion-specific interactions, their effective charge distributions, and effective interactions
Particles inside electrolytes with ion-specific interactions, their effective charge distributions, and effective interactions Open
In this work, we explore the statistical physics of colloidal particles that\ninteract with electrolytes via ion-specific interactions. Firstly we study\nparticles interact weakly with electrolyte using linear response theory. We\nfind tha…