Laboratoire de physique théorique de la matière condensée | LPTMC

• Article dans une revue

Diffusing diffusivity model with dichotomous noise

Dongho Lee, Jae-Hyung Jeon, Pascal Viot, Gleb Oshanin

Abstract We study Langevin dynamics with stochastic diffusivity arising from fluctuations of the surrounding medium. The diffusivity is modeled as an Ornstein–Uhlenbeck process driven by symmetric dichotomous noise, which confines it to a finite interval. We derive analytical expressions for the…

Journal of Physics A: Mathematical and Theoretical, 2026, 59 (37), pp.375001. ⟨10.1088/1751-8121/aea1ad⟩. ⟨hal-05750051⟩

• Article dans une revue

Fastest First-Passage Time for Multiple Searchers with Finite Speed

Denis Grebenkov, Ralf Metzler, Gleb Oshanin

Physical Review Letters, 2026, 137 (12), pp.127102. ⟨10.1103/7q39-h9dv⟩. ⟨hal-05751130⟩

• Article dans une revue

Recognition in Confinement: The Dynamics of Homologous Gene Pairing

Ehud Haimov, Jonathan Hedley, Natalia Simonowicz, Yaxuan Xiao, Andrew Stannard, Gleb Oshanin, Angelo Rosa, Yuval Elani, Alexei Kornyshev

How can protein-independent, side-by-side alignment of homologous double-stranded DNA (dsDNA) arise as an early step in genome repair and genetic exchange, and what determines their kinetics under confinement? Although recombination proteins are known to facilitate this process, experiments…

PRX Life, 2026, 4 (3), pp.033023. ⟨10.1103/n5cv-svz2⟩. ⟨hal-05736005⟩

• Article dans une revue

Transverse geometry reshapes current and tracer fluctuation amplitudes in quasi-one-dimensional single files

Olivier Bénichou, Aurélien Grabsch

Single-file transport means no overtaking: particles move in a narrow channel while preserving their longitudinal order. This simple constraint has profound dynamical consequences, most notably tracer subdiffusion, and has made single-file transport a paradigmatic form of confined many-body motion,…

Reports on Progress in Physics, 2026, 89 (9), pp.090501. ⟨10.1088/1361-6633/ae9afb⟩. ⟨hal-05752788⟩