Buscar
Mostrando ítems 21-30 de 132
Exact ground-state behavior of a four-atom generalized Hubbard model
(1981)
The exact ground state of a four-atom system described by the generalized form of the Hubbard Hamiltonian is obtained. Next, the solution is used to extract relevant physical information on the dynamics of the cluster ...
Exact solution of a spin chain with binary and ternary interactions of Dzialoshinsky-Moriya type
(1999)
We analyze a one-dimensional spin system with two Dzialoshinsky-Moriya-like interactions which couple spins in pairs and triads, respectively. In spite of its intricate aspect, we obtain a very simple solution by means of ...
Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain
(2010)
We study the AB2 dimmer-connector chain within a generalized Hubbard model, which contains sitedependent
parameters, and different chemical potentials for A and B sites. Considering one electron per
atom, we carry out ...
Exact and adiabatic solutions for a spinless Peierls-Hubbard model in a finite cluster
(1993)
The exact solution of the Hubbard-Peierls model is given in a cluster of six atoms and three spinless electrons. Phonons with wave vector k=π are retained and quantum mechanically analyzed. Energy level and several averages ...
Dimensional crossover for the Bose-Einstein condensation
(Sociedad Mexicana de Fisica, 1998)
We study Bose-Einstein condensation (BEC) for a non-interacting gas in a very anisotropic trap. Therefore, at enough small temperatures some degrees of freedom "freeze", thus reducing the "effective" dimensionality of the ...
Homoclinic orbits in a piecewise linear Rössler-like circuit
(2005)
In addition to the well-known Rössler funnel that consists in near-homoclinic orbits, perfect homoclinic orbits have been found numerically and experimentally in a simplest piecewise linear Rössler-like electronic circuit. ...
Integração dos requisitos temporais de um Kernel de tempo-real e de sua comunicação em redes.
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Ciência da Computação - PPGCC, 2004-05-27)
The study performed on this paper is intended to extend the message exchange between process of a real time kernel, that nowadays is executed between processes on the same station, in order to cover also distinguish stations. ...
Dynamics of multilayer networks with amplification
(2020-12-01)
We study the dynamics of a multilayer network of chaotic oscillators subject to amplification. Previous studies have proven that multilayer networks present phenomena such as synchronization, cluster, and chimera states. ...
Identificación del sistema de Rössler: enfoque algebraico y algoritmos genéticos
(Revista Mexicana de Física, 2009)
A Vila e a Prisão: novas perspectivas do conceito de prisionização
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Sociologia - PPGSCâmpus São Carlos, 2019-04-10)
This work is situated within the sociology of prisons field. More specifically, in the
process of apprehending and updating studies on the effects of the prison system on
certain groups of society, prison. The object of ...