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Symmetry-allowed phase transitions realized by the two-dimensional fully frustrated XY class
Petter Minnhagen, Beom Jun Kim, Sebastian Bernhardsson +1
A 2D Fully Frustrated XY(FFXY) class of models is shown to contain a new groundstate in addition to the checkerboard groundstates of the standard 2D FFXY model. The spin configurat…
Curvature-induced frustration in the model on hyperbolic surfaces
Seung Ki Baek, Hiroyuki Shima, Beom Jun Kim
We study low-temperature properties of the spin model on a negatively curved surface. Geometric curvature of the surface gives rise to frustration in local spin configuration,…
Intelligent tit-for-tat in the iterated prisoner's dilemma game
Seung Ki Baek, Beom Jun Kim
We seek a route to the equilibrium where all the agents cooperate in the iterated prisoner's dilemma game on a two-dimensional plane, focusing on the role of tit-for-tat strategy.…
Testing a priority-based queue model with Linux command histories
Seung Ki Baek, Tae Young Kim, Beom Jun Kim
We study human dynamics by analyzing Linux history files. The goodness-of-fit test shows that most of the collected datasets belong to the universality class suggested in the liter…
Diffusion on a heptagonal lattice
Seung Ki Baek, Su Do Yi, Beom Jun Kim
We study the diffusion phenomena on the negatively curved surface made up of congruent heptagons. Unlike the usual two-dimensional plane, this structure makes the boundary increase…
Korean Family Name Distribution in the Past
Hoang Ahn Tuan Kiet, Seung Ki Baek, Hawoong Jeong +1
We empirically study the genealogical trees of ten families for about five centuries in Korea. Although each family tree contains only the paternal part, the family names of women…
Family name distributions: Master equation approach
Seung Ki Baek, Hoang Anh Tuan Kiet, Beom Jun Kim
Although cumulative family name distributions in many countries exhibit power-law forms, there also exist counterexamples. The origin of different family name distributions across…
Reentrant phase transition in a predator-prey model
Sung-Guk Han, Su-Chan Park, Beom Jun Kim
We numerically investigate the six-species predator-prey game in complex networks as well as in -dimensional hypercubic lattices with . The interaction topology of…
Phase diagram of generalized fully frustrated XY model in two dimensions
Petter Minnhagen, Beom Jun Kim, Sebastian Bernhardsson +1
It is shown that the phase diagram of the two-dimensional generalized fully-frustrated XY model on a square lattice contains a crossing of the chirality transition and the Kosterli…