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Motivated by a novel method for granular segregation, we analyze the one dimensional drift-diffusion between two absorbing boundaries. The time evolution of the probability distribution and the rate of absorption are given by explicit…

统计力学 · 物理学 2009-10-31 Zeno Farkas , Tamas Fulop

A method for integrating the chemical equations associated with nuclear combustion at high temperature is presented and extensively checked. Following the idea of E. M\"uller, the feedback between nuclear rates and temperature was taken…

天体物理学 · 物理学 2007-05-23 Ruben M. Cabezon Gomez , Domingo Garcia-Senz , Eduardo Bravo

Using the Dirac-Frenkel variational principle, a time-dependent description of the dynamics of a two-level system coupled to a bosonic bath is formulated. The method is applied to the case of a gas of cold atoms adsorbing to an elastic…

介观与纳米尺度物理 · 物理学 2024-12-04 Dennis P. Clougherty

The BOUND program calculates the bound states of a complex formed from two interacting particles using coupled-channel methods. It is particularly suitable for the bound states of atom-molecule and molecule-molecule Van der Waals complexes…

化学物理 · 物理学 2019-03-15 Jeremy M. Hutson , C. Ruth Le Sueur

We present linear response theories in the continuum capable of describing photoionization spectra and dynamic polarizabilities of finite systems with no spatial symmetry. Our formulations are based on the time-dependent local density…

化学物理 · 物理学 2016-09-08 Takashi Nakatsukasa , Kazuhiro Yabana

We collect examples of boundary-value problems of Dirichlet and Dirichlet-Neumann type which we found instructive when designing and analysing numerical methods for fully nonlinear elliptic partial differential equations. In particular, our…

数值分析 · 数学 2018-12-18 Max Jensen , Iain Smears

Collisions in a system of two particles at energies close to a bound state in different channels are discussed. Next, the bound state decays into a third coupled channel. A phenomenological approach to dd->pi-p3He reaction is presented.

核理论 · 物理学 2014-04-17 Slawomir Wycech , Wojciech Krzemien

A phase eld approach is developed to model wetting and heterogeneous crystal nucleation of an undercooled pure liquid in contact with a sharp wall. We discuss various choices for the boundary condition at the wall and determine the…

材料科学 · 物理学 2009-11-11 László Gránásy , Tamás Pusztai , David Saylor , James A. Warren

We consider a spatially homogeneous advection-diffusion equation in which the diffusion tensor and drift velocity are time-independent, but otherwise general. We derive asymptotic expressions, valid at large distances from a steady point…

混沌动力学 · 物理学 2015-05-20 John Grant , Michael Wilkinson

A survey is given on the applications of hydrodynamic model of nucleus-nucleus collisons, focusing especially on i) the resolution of hydrodynamic equations for arbitrary configurations, by using the smoothed-particle hydrodynamic approach;…

高能物理 - 唯象学 · 物理学 2015-06-25 Y. Hama , T. Kodama , O. Socolowski

We formulate a continuum linear response theory on the basis of the Hartree-Fock-Bogoliubov formalism in the coordinate space representation in order to describe low-lying and high-lying collective excitations which couple to one-particle…

核理论 · 物理学 2009-11-07 M. Matsuo

We present a brief overview of recent developments in ab initio calculations of nuclear scattering and reactions with a focus on applications of the no-core shell model with continuum method.

核理论 · 物理学 2021-01-21 Sofia Quaglioni , Petr Navratil

Compound-nuclear processes play an important role for nuclear physics applications and are crucial for our understanding of the nuclear many-body problem. Despite intensive interest in this area, some of the available theoretical…

核理论 · 物理学 2015-06-19 Brett V. Carlson , Jutta E. Escher , Mahir S. Hussein

An interesting physical process has been unveiled: dynamical core excitation during a breakup reaction of loosely bound $core+N$ systems. These reactions are typically used to extract spectroscopic information and/or astrophysical…

核理论 · 物理学 2009-11-11 N. C. Summers , F. M. Nunes , I. J. Thompson

We derive new boundary conditions and implementation procedures for nonlinear initial boundary value problems that lead to energy and entropy bounded solutions. A step-by-step procedure for general nonlinear hyperbolic problems on…

数值分析 · 数学 2024-05-10 Jan Nordström

We discuss the use of one-nucleon breakup reactions of loosely bound nuclei at intermediate energies as an indirect method in nuclear astrophysics. These are peripheral processes, therefore we can extract asymptotic normalization…

核实验 · 物理学 2015-06-26 L. Trache , F. Carstoiu , C. A. Gagliardi , R. E. Tribble

This paper studies the boundary behaviour at mechanical equilibrium at the ends of a finite interval of a class of systems of interacting particles with monotone decreasing repulsive force. Our setting covers pile-ups of dislocations,…

偏微分方程分析 · 数学 2016-09-13 Cameron Hall , Thomas Hudson , Patrick van Meurs

In this paper we show that the theory of transfer reactions from bound to continuum states is well suited to extract structure information from data obtained by performing "spectroscopy in the continuum". The low energy unbound states of…

核理论 · 物理学 2009-11-10 G. Blanchon , A. Bonaccorso , N. Vinh Mau

We propose a novel family of equations of state for symmetric nuclear matter based on the induced surface tension concept for the hard-core repulsion. It is shown that having only four adjustable parameters the suggested equations of state…

核理论 · 物理学 2018-06-20 A. I. Ivanytskyi , K. A. Bugaev , V. V. Sagun , L. V. Bravina , E. E. Zabrodin

We consider a reaction-diffusion system where some components react and diffuse on the boundary of a region, while other components diffuse in the interior and react with those on the boundary through mass transport. We establish local…

偏微分方程分析 · 数学 2015-11-20 Vandana Sharma , Jeff Morgan
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