237 citations · 370 across the 24 of their papers we have counts for
24 papers
Loop expansion in polymer field theory: application to phase separation
Kiyoharu Kawana, Kyosuke Adachi
Liquid-liquid phase separation underlies phenomena ranging from protein condensate formation to the phase coexistence of synthetic polymers. Although the random phase approximation…
Beyond local detailed balance: Microscopic rates reshape nonequilibrium phase behavior
Takahiro Kanazawa, Kyogo Kawaguchi, Kyosuke Adachi
Local detailed balance (LDB) is a central guiding principle for modeling nonequilibrium stochastic dynamics, yet it only constrains the ratio of forward and backward transition rat…
Mean-Field Convective Phase Separation under Thermal Gradients
Meander Van den Brande, François Huveneers, Kyosuke Adachi
Nonequilibrium conditions fundamentally change how systems undergo phase separation. In lattice gases with attractive interactions under temperature gradients, particles have been…
Convection Patterns in Nonequilibrium Kawasaki Dynamics at Low Temperature
Meander Van den Brande, Kyosuke Adachi, Francois Huveneers
We study a conservative stochastic lattice gas (Kawasaki dynamics) coupled in the bulk to a heat bath, which leads to standard phase separation at low uniform temperatures. Instead…
Bubble formation in active binary mixture model
Kyosuke Adachi
Phase separation, the spontaneous segregation of density, is a ubiquitous phenomenon observed across diverse physical and biological systems. Within a crowd of motile elements, act…
Does the random nature of cell-virus interactions during in vitro infections affect TCID measurements and parameter estimation by mathematical models?
Christian Quirouette, Risavarshni Thevakumaran, Kyosuke Adachi +1
Endpoint dilution (TCID50) assays cannot count the number of infectious virions (IVs), and instead are limited to counting the number of Specific INfections caused by the sample (S…
Dynamical phase transitions in single particle Brownian motion without drift
Takahiro Kanazawa, Kyogo Kawaguchi, Kyosuke Adachi
Dynamical phase transitions (DPTs) arise from qualitative changes in the long-time behavior of stochastic trajectories, often observed in systems with kinetic constraints or driven…
Universality in the dynamical phase transitions of Brownian motion
Takahiro Kanazawa, Kyogo Kawaguchi, Kyosuke Adachi
We study the dynamical phase transitions (DPTs) appearing for a single Brownian particle without drift. We first explore how first-order DPTs in large deviations can be found even…
Power-law correlation in the homogeneous disordered state of anisotropically self-propelled systems
Kyosuke Adachi, Hiroyoshi Nakano
Self-propelled particles display unique collective phenomena, due to the intrinsic coupling of density and polarity. For instance, the giant number fluctuation appears in the orien…
Predicting heteropolymer interactions: demixing and hypermixing of disordered protein sequences
Kyosuke Adachi, Kyogo Kawaguchi
Cells contain multiple condensates which spontaneously form due to the heterotypic interactions between their components. Although the proteins and disordered region sequences that…
Activity-induced ferromagnetism in one-dimensional quantum many-body systems
Kazuaki Takasan, Kyosuke Adachi, Kyogo Kawaguchi
We study a non-Hermitian quantum many-body model in one dimension analogous to the Vicsek model or active spin models, and investigate its quantum phase transitions. The model cons…
Universal properties of repulsive self-propelled particles and attractive driven particles
Hiroyoshi Nakano, Kyosuke Adachi
Motility-induced phase separation (MIPS) is a nonequilibrium phase separation that has a different origin from equilibrium phase separation induced by attractive interactions. Simi…
Vortex dynamics in the two-dimensional BCS-BEC crossover
Max Heyl, Kyosuke Adachi, Yuki M. Itahashi +5
The Bardeen-Cooper-Schrieffer (BCS) condensation and Bose-Einstein condensation (BEC) are the two limiting ground states of paired Fermion systems, and the crossover between these…
Universal constraint on nonlinear population dynamics
Kyosuke Adachi, Ryosuke Iritani, Ryusuke Hamazaki
Ecological and evolutionary processes show various population dynamics depending on internal interactions and environmental changes. While crucial in predicting biological processe…
Universality of active and passive phase separation in a lattice model
Kyosuke Adachi, Kyogo Kawaguchi
The motility-induced phase separation (MIPS) is the spontaneous aggregation of active particles, while equilibrium phase separation (EPS) is thermodynamically driven by attractive…
Activity-induced phase transition in a quantum many-body system
Kyosuke Adachi, Kazuaki Takasan, Kyogo Kawaguchi
A crowd of nonequilibrium entities can show phase transition behaviors that are prohibited in conventional equilibrium setups. An interesting question is whether similar activity-d…
Surface wetting by kinetic control of liquid-liquid phase separation
Kyosuke Adachi, Kyogo Kawaguchi
Motivated by the observations of intracellular phase separations and the wetting of cell membranes by protein droplets, we study the nonequilibrium surface wetting by Monte Carlo s…
Chromatin state switching in a polymer model with mark-conformation coupling
Kyosuke Adachi, Kyogo Kawaguchi
We investigate the phase transition properties of the polymer-Potts model, a chain composed of monomers with magnetic degrees of freedom, with the motivation to study the conformat…
Theory of Non-Hermitian Fermionic Superfluidity with a Complex-Valued Interaction
Kazuki Yamamoto, Masaya Nakagawa, Kyosuke Adachi +3
Motivated by recent experimental advances in ultracold atoms, we analyze a non-Hermitian (NH) BCS Hamiltonian with a complex-valued interaction arising from inelastic scattering be…
Stabilization of vortex-liquid state by strong pairing interaction
Kyosuke Adachi, Ryusuke Ikeda
We theoretically investigate qualitative features of the field-temperature (-) phase diagram of superconductors with strong attractive interaction lying in the BCS-BEC crosso…
Dimensionality-induced BCS-BEC crossover in layered superconductors
Kyosuke Adachi, Ryusuke Ikeda
Based on a simple model of a layered superconductor with strong attractive interaction, we find that the separation of the pair-condensation temperature from the pair-formation tem…
Enhanced superconducting-fluctuation effects on thermodynamic properties in BCS-BEC-crossover regime
Kyosuke Adachi, Ryusuke Ikeda
Effects of superconducting fluctuation (SCF) on thermodynamic properties of electron systems in the so-called BCS-BEC-crossover regime are studied. As the attractive interaction be…
Fluctuation Diamagnetism in Two-Band Superconductors
Kyosuke Adachi, Ryusuke Ikeda
Anomalously large fluctuation diamagnetism around the superconducting critical temperature has been recently observed on iron selenide (FeSe) [S. Kasahara et al., unpublished]. Thi…
Possible Field-Temperature Phase Diagrams of Two-Band Superconductors with Paramagnetic Pair-Breaking
Kyosuke Adachi, Ryusuke Ikeda
Possible field-temperature superconducting (SC) phase diagrams in two-band quasi-two-dimensional materials with a strong paramagnetic pair-breaking (PPB) are considered theoretical…