45 citations · 304 across the 20 of their papers we have counts for
21 papers
Coherence enhanced by detrained oscillators: Breaking -reflection symmetry
Hyunsuk Hong, Jae Sung Lee, Hyunggyu Park
We study a generalized Kuramoto model in which each oscillator carries two coupled phase variables, representing a minimal swarmalator system. Assuming perfect correlation between…
Thermodynamic anomalies in overdamped systems with time-dependent temperature
Shakul Awasthi, Hyunggyu Park, Jae Sung Lee
One of the key objectives in investigating small stochastic systems is the development of micrometer-sized engines and the understanding of their thermodynamics. However, the prima…
Stochastic Differential Equation for a System Coupled to a Thermostatic Bath via an Arbitrary Interaction Hamiltonian
Jong-Min Park, Hyunggyu Park, Jae Sung Lee
The conventional Langevin equation offers a mathematically convenient framework for investigating open stochastic systems interacting with their environment or a bath. However, it…
Thermodynamic Trade-off Relation for First Passage Time in Resetting Process
Priyo Shankar Pal, Arnab Pal, Hyunggyu Park +1
Resetting is a strategy for boosting the speed of a target-searching process. Since its introduction over a decade ago, most studies have been carried out under the assumption that…
Multidimensional entropic bound: Estimator of entropy production for general Langevin dynamics with an arbitrary time-dependent protocol
Sangyun Lee, Dong-Kyum Kim, Jong-Min Park +3
Entropy production (EP) is a key quantity in thermodynamics, and yet measuring EP has remained a challenging task. Here we introduce an EP estimator, called multidimensional entrop…
Perturbative Steady States of Completely Positive Quantum Master Equations
Jae Sung Lee, Joonhyun Yeo
The Lindblad form guarantees complete positivity of a Markovian quantum master equation (QME). However, its microscopic derivation for a quantum system weakly interacting with a th…
Speed limit for a highly irreversible process and tight finite-time Landauer's bound
Jae Sung Lee, Sangyun Lee, Hyukjoon Kwon +1
Landauer's bound is the minimum thermodynamic cost for erasing one bit of information. As this bound is achievable only for quasistatic processes, finite-time operation incurs addi…
Effects of the non-Markovianity and non-Gaussianity of active environmental noises on engine performance
Jae Sung Lee, Hyunggyu Park
An active environment is a reservoir containing \emph{active} materials, such as bacteria and Janus particles. Given the self-propelled motion of these materials, powered by chemic…
Universal form of thermodynamic uncertainty relation for Langevin dynamics
Jae Sung Lee, Jong-Min Park, Hyunggyu Park
Thermodynamic uncertainty relation (TUR) provides a stricter bound for entropy production (EP) than that of the thermodynamic second law. This stricter bound can be utilized to inf…
Geometry-induced rectification for an active object
Jae Sung Lee, Jong-Min Park, Jae Dong Noh +1
Study on a rectified current induced by active particles has received a great attention due to its possible application to a microscopic motor in biological environments. Insertion…
Comment on "Universal Lindblad equation for open quantum systems"
Jae Sung Lee, Joonhyun Yeo
In this Comment, we show that the thermal Gibbs state given in terms of a time-independent system Hamiltonian is not a steady state solution of the quantum master equation introduc…
Brownian heat engine with active reservoirs
Jae Sung Lee, Jong-Min Park, Hyunggyu Park
Microorganisms such as bacteria are active matters which consume chemical energy and generate their unique run-and-tumble motion. A swarm of such microorganisms provide a nonequili…
Exactly solvable two-terminal heat engine with asymmetric Onsager coefficients: Origin of the power-efficiency bound
Jae Sung Lee, Jong-Min Park, Hyun-Myung Chun +2
An engine producing a finite power at the ideal (Carnot) efficiency is a dream engine, which is not prohibited by the thermodynamic second law. Some years ago, a two-terminal heat…
Thermodynamic uncertainty relation for underdamped Langevin systems driven by a velocity-dependent force
Jae Sung Lee, Jong-Min Park, Hyunggyu Park
Recently, it has been shown that there is a trade-off relation between thermodynamic cost and current fluctuations, referred to as the thermodynamic uncertainty relation (TUR). The…
Carnot efficiency and zero-entropy-production rate do not guarantee reversibility of a process
Jae Sung Lee, Sang Hoon Lee, Jaegon Um +1
Thermodynamic process at zero-entropy-production (EP) rate has been regarded as a reversible process. A process achieving the Carnot efficiency is also considered as a reversible p…
Stochastic Thermodynamics and Hierarchy of Fluctuation Theorems with Multiple Reservoirs
Jae Sung Lee, Hyunggyu Park
We reformulate stochastic thermodynamics in terms of noise realizations for Langevin systems in contact with multiple reservoirs and investigated the structure of the second laws o…
Additivity of multiple heat reservoirs in Langevin equation
Jae Sung Lee, Hyunggyu Park
The Langevin equation greatly simplifies the mathematical expression of the effects of thermal noise by using only two terms, a dissipation term, and a random-noise term. The Lange…
Carnot efficiency is reachable in an irreversible process
Jae Sung Lee, Hyunggyu Park
In thermodynamics, there exists a conventional belief that "the Carnot efficiency is reachable only when a process is reversible." However, there is no theorem proving that the Car…
Optimal tuning of a confined Brownian information engine
J. -M. Park, J. S. Lee, J. D. Noh
A Brownian information engine is a device extracting a mechanical work from a single heat bath by exploiting the information on the state of a Brownian particle immersed in the bat…
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…
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…