1,012 research outputs found
Informative economy for viable development: modern tendencies
In the second half of XX of lawsuit information technologies (IТ) were
absorbed in itself by the avalanche-type achievements of electronics, and
also mathematics, philosophy, psychology and economy. An appearing as a
result viable hybrid marked a revolutionary jump in history of information
technologies, that counts hundreds of thousands of years. Modern society is
gap-filling and pierced by the streams of information, that need treatment.
Therefore without IТ, equal as without power, transport and chemical
technologies, it it is normal to function does not can. Socio-economic
planning and management, production and transport, jars and exchanges,
mass and publishing house medias, defensive systems, social and lawenforcement
databases, service and health protection, educational
processes, offices for processing of scientific and business information,
finally, Internet - everywhere IТ
Supersymmetric FRW model and the ground state of supergravity
In this work we construct the vacuum configuration of supergravity
interacting with homogeneous complex scalar matter fields. The corresponding
configuration is of the FRW model invariant under the local conformal
time supersymmetry, which is a subgroup of the four dimensional space-time
supersymmetry. We show, that the potential of the scalar matter fields is a
function of the K\"ahler potential and of the arbitrary parameter .
This parameter enumerates the vacuum states. The scalar matter potential
induces the spontaneous breaking of supersymmetry in supergravity. On the
quantum level our model is a specific supersymmetric quantum mechanics, which
admits quantum states in supergravity, and the states with zero energy are
described by the wave function of the FRW universe.Comment: 18 pages, Revtex, submitted to PR
Ghost-Free Higher Derivative Quantum Gravity, the Hierarchy and the Cosmological Constant Problems
Proposing new solution problems of the hierarchy and smallness of the
cosmological constant using the Tev scale of the Standard Model in new
framework of the higher-order gravity.Comment: 5 pages referances added, published versio
Reparametrization Invariance and the Schr\"odinger Equation
In the present work we consider a time-dependent Schr\"odinger equation for
systems invariant under the reparametrization of time. We develop the two-stage
procedure of construction such systems from a given initial ones, which is not
invariant under the time reparametrization. One of the first-class constraints
of the systems in such description becomes the time-dependent Schr\"odinger
equation. The procedure is applicable in the supersymmetric theories as well.
The supersymmetric quantum mechanics is coupled to world-line
supergravity, and the local supersymmetric action is constructed leading to the
square root representation of the time-dependent Schr\"odinger equation.Comment: RevTeX,25 page
Optimization of quantum cascade laser operation by geometric design of cascade active band in open and closed models
Using the effective mass and rectangular potential approximations, the theory
of electron dynamic conductivity is developed for the plane multilayer
resonance tunnel structure placed into a constant electric field within the
model of open nanosystem, and oscillator forces of quantum transitions within
the model of closed nanosystem. For the experimentally produced quantum cascade
laser with four-barrier active band of separate cascade, it is proven that just
the theory of dynamic conductivity in the model of open cascade most adequately
describes the radiation of high frequency electromagnetic field while the
electrons transport through the resonance tunnel structure driven by a constant
electric field.Comment: 10 pages, 2 figure
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