166 citations · 595 across the 25 of their papers we have counts for
23 papers · 1 filter
Statistical inference as Green's functions
Hyun Keun Lee, Chulan Kwon, Yong Woon Kim
Statistical inference from data is a foundational task in science. Recently, it has received growing attention for its central role in inference systems of primary interest in data…
Thermodynamic uncertainty relation for underdamped dynamics driven by time-dependent protocols
Chulan Kwon, Youngchae Kwon, Hyun Keun Lee
The thermodynamic uncertainty relation (TUR) for underdamped dynamics has intriguing problems while its counterpart for overdamped dynamics has recently been derived. Even for the…
Non-equilibrium driven by an external torque in the presence of a magnetic field
Sangyun Lee, Chulan Kwon
We investigate a motion of a colloid in a harmonic trap driven out of equilibrium by an external non-conservative force producing a torque in the presence of a uniform magnetic fie…
Three heats in strongly coupled system and bath
Chulan Kwon, Jaegon Um, Joonhyun Yeo +1
We investigate three kinds of heat produced in a system and a bath strongly coupled via an interaction Hamiltonian. By studying the energy flows between the system, the bath, and t…
Mutual information change in feedback processes driven by measurement
Chulan Kwon
We investigate thermodynamics of feedback processes driven by measurement. Regarding system and memory device as a composite system, mutual information as a measure of correlation…
Information thermodynamics for a multi-feedback process with time delay
Chulan Kwon, Jaegon Um, Hyunggyu Park
We investigate a measurement-feedback process of repeated operations with time delay. During a finite-time interval, measurement on the system is performed and the feedback protoco…
Molecular dynamics study on a nonequilibrium motion of a colloidal particle driven by an external torque
Donghwan Yoo, Youngkyun Jung, Chulan Kwon
We investigate the motion of a colloidal particle driven out of equilibrium by an external torque. We use the molecular dynamics simulation that is alternative to the numerical int…
Housekeeping Entropy in Continuous Stochastic Dynamics with Odd-Parity Variables
Joonhyun Yeo, Chulan Kwon, Hyun Keun Lee +1
We investigate the decomposition of the total entropy production in continuous stochastic dynamics when there are odd-parity variables that change their signs under time reversal.…
Path-dependent Entropy Production
Chulan Kwon
A rigorous derivation of nonequilibrium entropy production via the path-integral formalism is presented. Entropy production is defined as the entropy change piled in a heat reservo…
Unconventional entropy production in the presence of momentum-dependent forces
Chulan Kwon, Joonhyun Yeo, Hyun Keun Lee +1
We investigate an unconventional nature of the entropy production (EP) in nonequilibrium systems with odd-parity variables that change signs under time reversal. We consider the Br…
Total cost of operating an information engine
Jaegon Um, Haye Hinrichsen, Chulan Kwon +1
We study a two-level system controlled in a discrete feedback loop, modeling both the system and the controller in terms of stochastic Markov processes. We find that the extracted…
Comment on "Exact fluctuation theorem without ensemble quantities"
Jae Sung Lee, Sourabh Lahiri, Chulan Kwon
In a recent work by Cuetara et al. (Phys. Rev. E 89, 052119 (2014)), the authors claimed that if a system is prepared under suitable initial conditions, then the total entropy prod…
Heat fluctuations and initial ensembles
Kwangmoo Kim, Chulan Kwon, Hyunggyu Park
Time-integrated quantities such as work and heat increase incessantly in time during nonequilibrium processes near steady states. In the long-time limit, the average values of work…
Overdamped limit and inverse friction expansion for the Brownian motion in an inhomogeneous medium
Xavier Durang, Chulan Kwon, Hyunggyu Park
We revisit the problem of the overdamped (large friction) limit of the Brownian dynamics in an inhomogeneous medium characterized by a position-dependent friction coefficient and a…
Modified saddle-point integral near singularity for the large deviation function
Jae Sung Lee, Chulan Kwon, Hyunggyu Park
Long-time-integrated quantities in stochastic processes, in or out of equilibrium, usually exhibit rare but huge fluctuations. Work or heat production is such a quantity, of which…
Work fluctuations in a time-dependent harmonic potential: rigorous results and beyond the overdamped limit
Chulan Kwon, Jae Dong Noh, Hyunggyu Park
We investigate the stochastic motion of a Brownian particle in the harmonic potential with a time-dependent force constant. It may describe the motion of a colloidal particle in an…
Multiple dynamic transitions in nonequilibrium work fluctuations
Jae Dong Noh, Chulan Kwon, Hyunggyu Park
The time-dependent work probability distribution function is investigated analytically for a diffusing particle trapped by an anisotropic harmonic potential and driven by a…
Threshold for everlasting initial memory in equilibration processes
J. S. Lee, Chulan Kwon, Hyunggyu Park
Conventional wisdom indicates that initial memory should decay away exponentially in time for general (noncritial) equilibration processes. In particular, time-integrated quantitie…
Fluctuation theorems in general stochastic processes with odd-parity variables
Hyun Keun Lee, Chulan Kwon, Hyunggyu Park
We show that the total entropy production in stochastic processes with odd-parity variables (under time reversal) is separated into three parts, only two of which satisfy the integ…
Nonequilibrium Steady State Driven by a Nonlinear Drift Force
Chulan Kwon, Ping Ao
We investigate the properties of the nonequilibrium steady state for the stochastic system driven by a nonlinear drift force and influenced by noises which are not identically and…
Non-equilibrium fluctuations for linear diffusion dynamics
Chulan Kwon, Jae Dong Noh, Hyunggyu Park
We present the theoretical study on non-equilibrium (NEQ) fluctuations for diffusion dynamics in high dimensions driven by a linear drift force. We consider a general situation in…
Equivalence of operator-splitting schemes for the integration of the Langevin equation
H. K. Lee, C. Kwon, Hyunggyu Park
We investigate the equivalence of different operator-splitting schemes for the integration of the Langevin equation. We consider a specific problem, so called the directed percolat…
Structure of Stochastic Dynamics near Fixed Points
Chulan Kwon, Ping Ao, David J. Thouless
We analyze the structure of stochastic dynamics near either a stable or unstable fixed point, where force can be approximated by linearization. We find that a cost function that de…