40 citations · 328 across the 25 of their papers we have counts for
19 papers · 1 filter
Validity of annealed approximation in a high-dimensional system
Jaegon Um, Hyunsuk Hong, Hyunggyu Park
This study investigates the suitability of the annealed approximation in high-dimensional systems characterized by dense networks with quenched link disorder, employing models of c…
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…
Effective potential approach to hybrid synchronization transitions
Je Ung Song, Jaegon Um, Jinha Park +1
The Kuramoto model exhibits different types of synchronization transitions depending on the type of natural frequency distribution. To obtain these results, the Kuramoto self-consi…
Nonequilibrium phase transition in an open quantum spin system with long-range interaction
Minjae Jo, Jaegon Um, B. Kahng
We investigate a nonequilibrium phase transition in a dissipative and coherent quantum spin system using the quantum Langevin equation and mean-field theory. Recently, the quantum…
Entropy production and fluctuation theorems on complex networks
Jaewoo Jung, Jaegon Um, Deokjae Lee +4
Entropy production (EP) is known as a fundamental quantity for measuring the irreversibility of processes in thermal equilibrium and states far from equilibrium. In stochastic ther…
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…