832 research outputs found
Can the EAEU deliver external integration to business?
Purpose: The research aims to analyze the EAEU's abilities to develop business connections as part of external-integration relations. It is to check whether or not free trade agreements and economic cooperation agreements translate into business and economic effects. As the EAEU has its ambition to become a bridge connecting Asia with Europe, the agreements concluded with third countries seem to be part of its strategy to achieve this goal. Due to the above, the research attempts to answer the question about key advantages enabling the creation of such a bridge. It takes into account a vantage the EAEU countries have resulting from their geographical location as well as evaluates skills and possibilities of developing logistics corridors in transcontinental relations, creating appropriate transport infrastructure, logistics centers and comprehensive development of logistics competences. Design/Methodology/Approach: The research was carried out with a multi-criteria method using critical literature analysis, logical construct method as well as statistical research. Findings: The research identifies and assesses main business and logistics areas of the EAEU's impact on external-integration in Eurasia. Practical Implications: The areas studied in the article may constitute significant comaparative advantages of the EAEU and affect business relations in Eurasia. Originality/Value: The research concerns a new dimension of external integration of the EAEU. The researched agreements as well as their business and logistic effects can have significant consequences for the whole of Eurasia.peer-reviewe
Generation and control of resonance states in crossed magnetic and electric fields
A two-dimensional electron system interacting with an impurity and placed in
crossed magnetic and electric fields is under investigation. Since it is
assumed that an impurity center interacts as an attractive -like
potential a renormalization procedure for the retarded Green's function has to
be carried out. For the vanishing electric field we obtain a close analytical
expression for the Green's function and we find one bound state localized
between Landau levels. It is also shown by numerical investigations that
switching on the electric field new long-living resonance states localized in
the vicinity of Landau levels can be generated.Comment: 6 pages, 6 figures, 1 tabl
Synthesis and Properties of High Tilted Antiferroelectric Esters with Partially Fluorinated Alkoxyalkoxy Terminal Chains
Novel chiral esters with partially fluorinated alkoxyalkoxy terminal chains are described. Their phase transition temperatures, enthalpies, and electrooptical properties are reported. A helical pitch in pure compounds and their mixtures based on selective reflection of light is also characterized
On Collective Effects in Cavity Quantum Electrodynamics
We investigate the role of collective effects in the micromaser system as
used in various studies of the physics of cavity electrodynamics. We focus our
attention on the effect on large-time correlations due to multi-atom
interactions. The influence of detection efficiencies and collective effects on
the appearance of trapping states at low temperatures is also found to be of
particular importance.Comment: 10 pages, 7 figures, 36 reference
Dynamics, correlations and phases of the micromaser
The micromaser possesses a variety of dynamical phase transitions
parametrized by the flux of atoms and the time-of-flight of the atom within the
cavity. We discuss how these phases may be revealed to an observer outside the
cavity using the long-time correlation length in the atomic beam. Some of the
phase transitions are not reflected in the average excitation level of the
outgoing atom, which is the commonly used observable. The correlation length is
directly related to the leading eigenvalue of the time evolution operator,
which we study in order to elucidate the phase structure. We find that as a
function of the time-of-flight the transition from the thermal to the maser
phase is characterized by a sharp peak in the correlation length. For longer
times-of-flight there is a transition to a phase where the correlation length
grows exponentially with the flux. We present a detailed numerical and
analytical treatment of the different phases and discuss the physics behind
them.Comment: 60 pages, 18 figure files, Latex + \special{} for the figures, (some
redundant figures are eliminated and others are changed
Macroscopic Interference Effects in Resonant Cavities
We investigate the possibility of interference effects induced by macroscopic
quantum-mechanical superpositions of almost othogonal coherent states - a
Schroedinger cats state - in a resonant microcavity. Despite the fact that a
single atom, used as a probe of the cat state, on the average only change the
mean number of photons by one unit, we show that this single atom can change
the system drastically. Interference between the initial and almost orthogonal
macroscopic quantum states of the radiation field can now take place.
Dissipation under current experimental conditions is taken into account and it
is found that this does not necessarily change the intereference effects
dramatically.Comment: 20 pages, 3 figure
Deterministic generation of an on-demand Fock state
We theoretically study the deterministic generation of photon Fock states
on-demand using a protocol based on a Jaynes Cummings quantum random walk which
includes damping. We then show how each of the steps of this protocol can be
implemented in a low temperature solid-state quantum system with a
Nitrogen-Vacancy centre in a nano-diamond coupled to a nearby high-Q optical
cavity. By controlling the coupling duration between the NV and the cavity via
the application of a time dependent Stark shift, and by increasing the decay
rate of the NV via stimulated emission depletion (STED) a Fock state with high
photon number can be generated on-demand. Our setup can be integrated on a chip
and can be accurately controlled.Comment: 13 pages, 9 figure
Solvable model of a strongly-driven micromaser
We study the dynamics of a micromaser where the pumping atoms are strongly
driven by a resonant classical field during their transit through the cavity
mode. We derive a master equation for this strongly-driven micromaser,
involving the contributions of the unitary atom-field interactions and the
dissipative effects of a thermal bath. We find analytical solutions for the
temporal evolution and the steady-state of this system by means of phase-space
techniques, providing an unusual solvable model of an open quantum system,
including pumping and decoherence. We derive closed expressions for all
relevant expectation values, describing the statistics of the cavity field and
the detected atomic levels. The transient regime shows the build-up of mixtures
of mesoscopic fields evolving towards a superpoissonian steady-state field
that, nevertheless, yields atomic correlations that exhibit stronger
nonclassical features than the conventional micromaser.Comment: 9 pages, 16 figures. Submitted for publicatio
Revival-collapse phenomenon in the fluctuations of quadrature field components of the multiphoton Jaynes-Cummings model
In this paper we consider a system consisting of a two-level atom, initially
prepared in a coherent superposition of upper and lower levels, interacting
with a radiation field prepared in generalized quantum states in the framework
of multiphoton Jaynes-Cummings model. For this system we show that there is a
class of states for which the fluctuation factors can exhibit revival-collapse
phenomenon (RCP) similar to that exhibited in the corresponding atomic
inversion. This is shown not only for normal fluctuations but also for
amplitude-squared fluctuations. Furthermore, apart from this class of states we
generally demonstrate that the fluctuation factors associated with three-photon
transition can provide RCP similar to that occurring in the atomic inversion of
the one-photon transition. These are novel results and their consequence is
that RCP occurred in the atomic inversion can be measured via a homodyne
detector. Furthermore, we discuss the influence of the atomic relative phases
on such phenomenon.Comment: 17 pages, 4 figure
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