68 research outputs found
Harmonic oscillators in the Nos\'e - Hoover thermostat
We study the dynamics of an ensemble of non-interacting harmonic oscillators
in a nonlinear dissipative environment described by the Nos\'e - Hoover model.
Using numerical simulation we find the histogram for total energy, which agrees
with the analysis of the Nos\'e - Hoover equations effected with the method of
averaging. The histogram does not correspond to Gibbs' canonical distribution.
We have found oscillations at frequency proportional to ,
the dissipative parameter of thermostat and the characteristic
mass of particle, about the stationary state corresponding to equilibrium. The
oscillations could have an important bearing upon the analysis of simulating
molecular dynamics in the Nos\'e - Hoover thermostat.Comment: 7 pages, 4 figure
Quantum effective potential, electron transport and conformons in biopolymers
In the Kirchhoff model of a biopolymer, conformation dynamics can be
described in terms of solitary waves, for certain special cross-section
asymmetries. Applying this to the problem of electron transport, we show that
the quantum effective potential arising due to the bends and twists of the
polymer enables us to formalize and quantify the concept of a {\it conformon}
that has been hypothesized in biology. Its connection to the soliton solution
of the cubic nonlinear Schr\"{o}dinger equation emerges in a natural fashion.Comment: to appear in J. Phys.
Nonlinear dynamics of molecular systems and the correlations of internal motions in oligopeptides
The Topology of the Energy Landscapes of Macromolecules in the Torsion Angle Space and the Principle of the Minimum Energy Dissipation Rate in Conformational Relaxation
Molecular dynamics of oligopeptides. A comparative study of residue interactions in dipeptides
Not Available
Not AvailableThe effect of dietary supplementation of coriander seed powder on egg cholesterol, serum lipid profile, and caecal microbiology in laying quailsNot Availabl
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