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Numerical analysis of Dicke’s model for one atom
(1982)
Using the Green function technique, the authors calculate the transition probability amplitude for one atom interacting with a one-mode electromagnetic field, without assuming the rotating-wave approximation (RWA). The ...
The construction of a Poisson structure out of a symmetry and a conservation law of a dynamical system
(1996)
A method to construct Hamiltonian theories for systems of both ordinary and partial differential equations is presented. The knowledge of a Lagrangian is not at all necessary to achieve the result. The only ingredients ...
Physics: An Endangered Subject?
(Daily Express, 2002-10)
This article reflects on the declining popularity of physics in Trinidad and Tobago, and suggests that this may be due to the restrictive, regimented, and unappealing methods of instruction and modes of delivery. It is ...
Elastic instability of grain boundaries and the physical origin of superplasticity
(American Inst of Physics, 2000)
The dependence of the superplastic flow on the efficiency of grain boundaries for capturing and releasing vacancies is demonstrated. It is emphasized that this flow is dependent mostly on the sensitivity of this ability ...
Educational program promoting regular physical exercise improves functional capacity and daily living physical activity in subjects with knee osteoarthritis
(2017-12-27)
Background: Physical exercise and educational programs promote several benefits for patients with knee osteoarthritis (OA). However, little is known about the effects of educational programs promoting the regular practice ...
Ion solvation energies from density functional theory
(1991)
Electrostatic solvation energies of singly charged monoatomic ions may be predicted from the knowledge of an electrostatic potential buildup from a physically meaningful ionic radius. Since the asymptotic behavior of the ...
Chimera states in a Duffing oscillators chain coupled to nearest neighbors
(American Institute of Physics Inc., 2018)
Coupled nonlinear oscillators can present complex spatiotemporal behaviors. Here, we report the coexistence of coherent and incoherent domains, called chimera states, in an array of identical Duffing oscillators coupled ...
Spontaneous motion of localized structures induced by parity symmetry breaking transition
(American Institute of Physics Inc., 2018)
We consider a paradigmatic nonvariational scalar Swift-Hohenberg equation that describes short wavenumber or large wavelength pattern forming systems. This work unveils evidence of the transition from stable stationary to ...