Open Physics
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The checkerboard family of entangled states of two qutrits
Open Physics - Tập 9 Số 1 - 2011
AbstractBy modifying the method of Bruß and Peres, we construct two new families
of entangled two qutrit states. For all density matrices ρ in these families we
have ρ ij = 0 for i + j odd. The first family depends on 27 independent real
parameters and includes both PPT and NPT states. The second family consists of
PPT entangled states. The number of independent real parameters of this family
is ≥...
Extraction of interatomic potentials from structure of liquids
Open Physics - - 2005
AbstractThe connection between interatomic potentials and structure functions of
liquids is studied. The expressions for two- and three-body potentials are
obtained. The contribution of three-body effects is found to be significant,
reaching several per cent of the ground-state energy.
New results in the use of a “reverse engineering” method in cosmologies with scalar field
Open Physics - Tập 6 Số 1 - Trang 84-96 - 2008
Abstract The method of “reverse engineering” for designing potentials in
cosmologies with “quintessence” scalar field is systematically used for several
types of cosmologies (through the time behavior of the scale factor). The
general recipe is introduced and then applied when matter other than the scalar
field is present, and for tachyonic scalar fields. The possibility of using this
method for p...
An optimal iteration method with application to the Thomas-Fermi equation
Open Physics - - 2011
AbstractThe aim of this paper is to introduce a new approximate method, namely
the Optimal Parametric Iteration Method (OPIM) to provide an analytical
approximate solution to Thomas-Fermi equation. This new iteration approach
provides us with a convenient way to optimally control the convergence of the
approximate solution. A good agreement between the obtained solution and some
well-known results...
Investigation of isospin forbidden 0+ → 0+ Fermi beta decays with Pyatov method
Open Physics - Tập 12 Số 11 - Trang 785-791 - 2014
Abstract In the present work, the matrix elements, isospin impurities and log ft
values of the isospin forbidden 0+ → 0+ beta decays have been investigated. The
calculated results have been compared with available experimental and another
theoretical data. The isotopic invariance of the Hamiltonian has been restored
by Pyatov method. Within the quasi-particle random phase approximation (QRPA),
the...
One-axis molecular rotation and phonon scattering in solid C2H6 and C2F6
Open Physics - - 2011
AbstractUsing solid C2H6 and C2F6 as an example, the one-axis molecular rotation
effect on thermal conductivity has been considered in orientationally-ordered
(OO) and orientationally-disordered (OD) phases of simple molecular crystals.
The influence of molecular rotation on the heat transfer processes has been
studied by a modified method of reduced coordinates, which permitted separating
phonon-...
A theoretical model for the collective motion of proteins by means of principal component analysis
Open Physics - - 2011
AbstractA coarse grained model in the frame work of principal component analysis
is presented. We used a bath of harmonic oscillators approach, based on
classical mechanics, to derive the generalized Langevin equations of motion for
the collective coordinates. The dynamics of the protein collective coordinates
derived from molecular dynamics simulations have been studied for the Bovine
Pancreatic ...
High power self-controled volume discharge based molecular lasers
Open Physics - Tập 1 Số 4 - 2003
AbstractAn investigation was made of the characteristics of the formation of a
selfcontroled volume discharge for the pumping of CO2 lasers, i.e.
self-sustained volume discharge (SSVD), which involved a preliminary filling of
a discharge gap by an electron flux from an auxiliary-discharge plasma. We have
found that this method was suitable for large interelectrode gaps, that
distortion of the elec...
Measurement interpretation and information measures in general probabilistic theory
Open Physics - - 2013
Abstract The incompatibility of dynamics postulate (unitary evolution) and the
measurement postulate (wave-packet collapse) of quantum mechanics has recently
been solved by Zurek from an information transfer perspective. Luo gave his
derivation by relaxing the repeatability postulate. In this paper, we reconsider
Luo’s derivation in the setting of general probabilistic theory (GPT). We also
introd...
Exactly solvable problems of quantum mechanics and their spectrum generating algebras: A review
Open Physics - - 2007
Abstract In this review, we summarize the progress that has been made in
connecting supersymmetry and spectrum generating algebras through the property
of shape invariance. This monograph is designed to be used by our fellow
researchers, by other interested physicists, and by students at the graduate and
even undergraduate levels who would like a brief introduction to the field.
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