Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Posch, Harald"'
Publikováno v:
Phys. Rev. E 104, 024123 (2021)
Emergent bath-mediated attraction and condensation arise when multiple particles are simultaneously driven through an equilibrated bath under geometric constraints. While such scenarios are observed in a variety of non-equilibrium phenomena, with an
Externí odkaz:
http://arxiv.org/abs/2012.10733
Publikováno v:
J. Stat. Mech. (2020) 063216
The effect of particle overtaking on transport in a narrow channel is studied using a 1d model of a driven tracer in a quiescent bath. In contrast with the well-studied non-driven case, where the tracer's long-time dynamics changes from sub-diffusive
Externí odkaz:
http://arxiv.org/abs/1908.09290
Autor:
Bosetti, Hadrien, Posch, Harald A.
Publikováno v:
Commun. Theor. Phys. 62 pp. 451-468 (2014)
We use molecular dynamics simulations to compute the Lyapunov spectra of many-particle systems resembling simple fluids in thermal equilibrium and in non-equilibrium stationary states. Here we review some of the most interesting results and point to
Externí odkaz:
http://arxiv.org/abs/1501.03909
Autor:
Bosetti, Hadrien, Posch, Harald A.
The Oseledec splitting of the tangent space into covariant subspaces for a hyperbolic dynamical system is numerically accessible by computing the full set of covariant Lyapunov vectors. In this paper, the covariant Lyapunov vectors, the orthogonal Gr
Externí odkaz:
http://arxiv.org/abs/1111.5951
Autor:
Fouxon, Itzhak, Posch, Harald A.
We study the behavior of threads and polymers in a turbulent flow. These objects have finite spatial extension, so the flow along them differs slightly. The corresponding drag forces produce a finite average stretching and the thread is stretched mos
Externí odkaz:
http://arxiv.org/abs/1109.6834
Autor:
Posch, Harald A.
Lyapunov exponents are indicators for the chaotic properties of a classical dynamical system. They are most naturally defined in terms of the time evolution of a set of so-called covariant vectors, co-moving with the linearized flow in tangent space.
Externí odkaz:
http://arxiv.org/abs/1107.4032
Autor:
Bosetti, Hadrien, Posch, Harald A.
Publikováno v:
Chemical Physics, Volume 375, Issues 2-3, 5 October 2010, Pages 296-308
We carry out extensive computer simulations to study the Lyapunov instability of a two-dimensional hard disk system in a rectangular box with periodic boundary conditions. The system is large enough to allow the formation of Lyapunov modes parallel t
Externí odkaz:
http://arxiv.org/abs/1005.1172
Recently, a new algorithm for the computation of covariant Lyapunov vectors and of corresponding local Lyapunov exponents has become available. Here we study the properties of these still unfamiliar quantities for a number of simple models, including
Externí odkaz:
http://arxiv.org/abs/1004.4473
Autor:
van Meel, Jacobus A., Posch, Harald A.
The dynamical instability of rough hard-disk fluids in two dimensions is characterized through the Lyapunov spectrum and the Kolmogorov-Sinai entropy, $h_{KS}$, for a wide range of densities and moments of inertia $I$. For small $I$ the spectrum sepa
Externí odkaz:
http://arxiv.org/abs/0904.0357
Publikováno v:
Physical Review E, vol.75, 061109 (2007)
We characterize the time evolution of a d-dimensional probability distribution by the value of its final entropy. If it is near the maximally-possible value we call the evolution mixing, if it is near zero we say it is purifying. The evolution is det
Externí odkaz:
http://arxiv.org/abs/nlin/0703012