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A switching dynamical system by means of piecewise linear systems in R^3 that presents multistability is presented. The flow of the system displays multiple scroll attractors due to the unstable hyperbolic focus-saddle equilibria with…

混沌动力学 · 物理学 2018-09-17 L. J. Ontanon-Garcia , E. Campos-Canton

This paper addresses the stability of plane Couette flow in the presence of strong density and viscosity stratifications. It demonstrates the existence of a generalised inflection point that satisfies the generalised Fjortoft's criterion of…

流体动力学 · 物理学 2024-06-13 B. Bugeat , P. C. Boldini , A. M. Hasan , R. Pecnik

We study the appearance of bound states in the spin gap of spin-1/2 ladders induced by weak bond disorder. Starting from the strong-coupling limit, i.e., the limit of weakly coupled dimers, we perform a projection on the single-triplet…

强关联电子 · 物理学 2007-05-23 M. Arlego , W. Brenig , D. C. Cabra , F. Heidrich-Meisner , A. Honecker , G. Rossini

Quantum magnetism describes the properties of many materials such as transition metal oxides and cuprate superconductors. One of its elementary processes is the propagation of spin excitations. Here we study the quantum dynamics of a…

Stochastic motion of particles in a highly unstable potential generates a number of diverging trajectories leading to undefined statistical moments of the particle position. This makes experiments challenging and breaks down a standard…

The superflow in a superfluid is bounded from above by Landau's critical velocity. Within a microscopic bosonic model, I show that below this critical velocity there is a dynamical instability that manifests itself in an imaginary sound…

高能物理 - 唯象学 · 物理学 2014-03-26 Andreas Schmitt

Many-body localization is a dynamical phenomenon characteristic of strongly interacting and disordered many-body quantum systems which fail to achieve thermal equilibrium. From a quantum information perspective, the fingerprint of this…

Particles in pressure-driven channel flow are often inhomogeneously distributed. Two modes of low-Reynolds number instability, absent in Poiseuille flow of clean fluid, are created by inhomogeneous particle loading, and their mechanism is…

流体动力学 · 物理学 2024-11-27 Anup Kumar , Rama Govindarajan

We unravel the nonequilibrium correlated quantum quench dynamics of an impurity traveling through a harmonically confined Bose-Einstein condensate in one-dimension. For weak repulsive interspecies interactions the impurity oscillates within…

量子物理 · 物理学 2019-10-01 S. I. Mistakidis , F. Grusdt , G. M. Koutentakis , P. Schmelcher

Semiconductor $p^+ - p^- - n - p^+ - n^{++}$ structures with large junction and contact areas are treated as 1 \times 2-dimensional active media, in which self-organized pattern formation can be expected. The local bistable behavior of the…

patt-sol · 物理学 2009-10-31 A. V. Gorbatyuk , F. -J. Niedernostheide

The interplay between interactions and quenched disorder can result in rich dynamical quantum phenomena far from equilibrium, particularly when many-body localization prevents the system from full thermalization. With the aim of tackling…

无序系统与神经网络 · 物理学 2018-02-14 S. J. Thomson , M. Schiró

We investigate the dynamics of impurities walking along a semiconductor layer assisted by thermal noise of strength $D$ and external harmonic potential $V(x)$. Applying a nonhomogeneous hot temperature in the vicinity of the potential…

介观与纳米尺度物理 · 物理学 2015-05-20 Mesfin Asfaw , Berhanu Aragie , Mulugeta Bekele

Two coupled, interpenetrating fluids suffer instabilities beyond certain critical counterflows. For ideal fluids, an energetic instability occurs at the point where a sound mode inverts its direction due to the counterflow, while dynamical…

广义相对论与量子宇宙学 · 物理学 2019-11-04 Nils Andersson , Andreas Schmitt

Meandering instability is familiar to everyone through river meandering or small rivulets of rain flowing down a windshield. However, its physical understanding is still premature, although it could inspire researchers in various fields,…

软凝聚态物质 · 物理学 2016-12-13 Yuki Yoshimura , Yui Yagisawa , Ko Okumura

We study the transport properties of two electrons in a quasi one-dimensional disordered wire. The electrons are subject to both, a disorder potential and a short range two-body interaction. Using the approach developed by Iida et al. […

无序系统与神经网络 · 物理学 2009-11-07 Jean Richert , Hans A. Weidenmuller

We compare theoretical and simulation results for static and dynamic properties for a model of particles interacting via a spherically symmetric repulsive ramp potential. The model displays anomalies similar to those found in liquid water,…

Developing on a recent work on localized bubbles of ordinary relativistic fluids, we study the comparatively richer leading order surface physics of relativistic superfluids, coupled to an arbitrary stationary background metric and gauge…

高能物理 - 理论 · 物理学 2017-09-21 Jay Armas , Jyotirmoy Bhattacharya , Akash Jain , Nilay Kundu

Controlling dopant transport with high spatial precision is crucial for improving the semiconductor functionality, reliability, and scalability. Although prior models of noise-assisted diffusion have been largely confined to idealized one…

统计力学 · 物理学 2025-09-12 Mesfin Taye , Yoseph Abebe , Tibebe Birhanu , Lemi Demeyu , Mulugeta Bekele

We study nucleation in the two dimensional Ising lattice-gas model of solute precipitation in the presence of randomly placed static and dynamic impurities. Impurity-solute and impurity-solvent interaction energies are varied whilst keeping…

统计力学 · 物理学 2024-09-04 Dipanjan Mandal , David Quigley

We study localization properties of disordered bosons and spins in random fields at zero temperature. We focus on two representatives of different symmetry classes, hard-core bosons (XY magnets) and Ising magnets in random transverse…

无序系统与神经网络 · 物理学 2013-07-22 Xiaoquan Yu , Markus Mueller
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