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Transport and diffusion of heat in one dimensional (1D) nonlinear systems which {\it conserve momentum} is typically thought to proceed anomalously. Notable exceptions, however, exist of which the rotator model is a prominent case.…

统计力学 · 物理学 2015-05-05 Yunyun Li , Sha Liu , Nianbei Li , Peter Hanggi , Baowen Li

Anomalous diffusion constitutes a relation between tracer flux and tracer density gradient that is inherently nonlocal in space and/or time. Previous studies emphasize the non-Gaussian character of the tracer distribution that arises from…

统计力学 · 物理学 2014-12-31 Bjorn Vermeersch , Ali Shakouri

In this paper, the existence of a non-trivial, positive and bounded critical traveling wave solution of a diffusive disease model, whose reaction system has infinity many equilibria, is obtained for the first time. This gives an affirmative…

偏微分方程分析 · 数学 2018-11-21 Jiangbo Zhou , Haimei Xu , Jingdong Wei , Liyuan Son

Employing time-dependent projection formalism, a Fokker-Planck equation with non-Markovian transport coefficients is derived for large amplitude collective motion. Properties of transport coefficients for diffusion processes in a potential…

核理论 · 物理学 2007-05-23 Noboru Takigawa , Sakir Ayik , Sachie Kimura

We show that a magnetic field perpendicular to an AlGaAs/GaAs coupled quantum well efficiently traps dipolar excitons and leads to the stabilization of the excitonic formation and confinement in the illumination area. Hereby, the density of…

介观与纳米尺度物理 · 物理学 2011-02-17 K. Kowalik-Seidl , X. P. Vögele , F. Seilmeier , D. Schuh , W. Wegscheider , A. W. Holleitner , J. P. Kotthaus

Temperature-dependent reflectivity and photoluminescence spectra are studied for undoped ultra-wide 150 nm and 250 nm GaAs quantum wells. It is shown that spectral features previously attributed to a size quantization of exciton motion in…

介观与纳米尺度物理 · 物理学 2015-06-12 V. V. Solovyev , V. A. Bunakov , S. Schmult , I. V. Kukushkin

We study the evolution of low-temperature magnetoresistance in double quantum wells in the region below 1 Tesla as the applied current density increases. A flip of the magneto-intersubband oscillation peaks, which occurs as a result of the…

介观与纳米尺度物理 · 物理学 2015-05-13 N. C. Mamani , G. M. Gusev , O. E. Raichev , T. E. Lamas , A. K. Bakarov

Two front instabilities in a reaction-diffusion system are shown to lead to the formation of complex patterns. The first is an instability to transverse modulations that drives the formation of labyrinthine patterns. The second is a…

patt-sol · 物理学 2009-10-28 Aric Hagberg , Ehud Meron

Reaction-diffusion processes across layered media arise in several scientific domains such as pattern-forming E. coli on agar substrates, epidermal-mesenchymal coupling in development, and symmetry-breaking in cell polarisation. We develop…

Motivated by numerical simulations showing the emergence of either periodic or irregular patterns, we explore a mechanism of pattern formation arising in the processes described by a system of a single reaction-diffusion equation coupled…

偏微分方程分析 · 数学 2015-03-19 Anna Marciniak-Czochra , Grzegorz Karch , Kanako Suzuki

The development of a Turing instability to a spatially modulated state in a photoexcited electron-hole system is proposed as a novel signature of exciton Bose statistics. We show that such an instability, which is driven by kinetics of…

介观与纳米尺度物理 · 物理学 2008-04-12 L. S. Levitov , B. D. Simons , L. V. Butov

Spatially indirect electron-hole exciton condensates stabilized by interlayer Fock exchange interactions have been predicted in systems containing a pair of two-dimensional semiconductor or semimetal layers separated by a thin tunnel…

介观与纳米尺度物理 · 物理学 2015-12-16 Xuehao Mou , Leonard F. Register , Allan H. MacDonald , Sanjay K. Banerjee

The present material covers the features of large scale ring dynamics in perturbed flows that were not addressed in part 1 (astro-ph/1606.00759); this includes an extensive coverage of all kinds of ring modes dynamics (except density waves…

地球与行星天体物理 · 物理学 2017-02-08 Pierre-Yves Longaretti

We claim that the analysis presented by Gaulin et al. (Phys. Rev. Lett. 84, 3446 (2000)) does not prove the two-dimensional character of the transition in NaV2O5 nor the charge ordering mechanism of the transition.

强关联电子 · 物理学 2007-05-23 S. Ravy , J. E. Lorenzo

The exciton ground state in strained quantum dots similar to those fabricated in article specified in the title is shortly discussed within a relevant model Hamiltonian. Some characteristics of the light--hole exciton ground state reached…

介观与纳米尺度物理 · 物理学 2014-05-28 E. Tsitsishvili

A non-perturbative nonlinear statistical approach is presented to describe turbulent magnetic systems embedded in a uniform mean magnetic field. A general formula in the form of an ordinary differential equation for magnetic field-line…

天体物理学 · 物理学 2009-11-13 A. Shalchi , I. Kourakis

We consider radiation transport theory applied to non-dispersive but refractive media. This setting is used to discuss Minkowski's and Abraham's electromagnetic momentum, and to derive conservation equations independent of the choice of…

天体物理学 · 物理学 2009-11-10 Mattias Marklund

In this paper, we study transport features of a one-dimensional beam-plasma system in the presence of multiple resonances. As a model description of the general problem of a warm energetic particle beam, we assume $n$ cold supra-thermal…

等离子体物理 · 物理学 2015-09-07 Nakia Carlevaro , Matteo V. Falessi , Giovanni Montani , Fulvio Zonca

Recently, microquasar jets have aroused the interest of many researchers focusing on the astrophysical plasma outflows and various jet ejections. In this work, we concentrate on the investigation of electromagnetic radiation and particle…

高能天体物理现象 · 物理学 2022-03-02 Theodora Papavasileiou , Odysseas Kosmas , Ioannis Sinatkas

It is demonstrated that the recently proposed pseudoclassical model for Weyl particles [1] (D.M. Gitman, A.E. Goncalves and I.V. Tyutin, Phys. Rev. D 50 (1994) 5439) is classically inconsistent. A possible way of removing the classical…

高能物理 - 理论 · 物理学 2007-05-23 Jose L. Cortes , Mikhail S. Plyushchay
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