128 research outputs found
Limitations on squeezing and formation of the superposition of two macroscopically distinguishable states at fundamental frequency in the process of second harmonic generation
The results of numerical simulations of quantum state evolution in the process of second harmonic generation (SHG) are discussed. It is shown that at a particular moment of time in the fundamental mode initially coherent state turns into a superposition of two macroscopically distinguished states. The question of whether this superposition exhibits quantum interference is analyzed
Sub-Poissonian light and photocurrent shot-noise suppression in closed opto-electronic loop
We examine experimentally photocurrent noise reduction in the opto-electronic closed loop. Photocurrent noise density 12.5 dB below the shot-noise was observed. So large suppression was not reached in previous experiments and cannot be explained in terms of an ordinary sub-Poissonian light in the loop. We propose the concept of anticorrelation state for the description of light in the loop
Formation of Luminescence Centers in Oxygen-Deficient Cerium Oxide Nanocrystals
In this work the peculiarities of oxygen vacancies formation in cerium oxide nanoparticles for different
external influences have been investigated by spectroscopic methods.
The features of oxygen vacancies and therefore non-stoichiometric cerium oxide formation in CeO2
nanocrystals depending on the atmosphere of high temperature treatment were investigated. Stimulation
of oxygen vacancies formation in reducing and neutral atmospheres was revealed. Occurrence of two different
luminescence centers (viz. the charge-transfer complexes formed by Ce4+ and O2- ions, and Ce3+ ions
stabilized by vacancies) after cerium oxide nanoparticles annealing in a neutral atmosphere has been observed.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3544
Image language of the metarealism in the context of evolution of the mechanism of implementation of the metaphor in russophone poetry of the 20 century
In the late 1980s, a poetic school of metarealism begins with a special image language and type of trope, metabola. The basis of the "third trope" is the mechanism of implementation of the metaphor due to the evolution of the poetic language in the twentieth century. The author attempts here to show the place of the image language of metarealism in the development of Russian poetry. The implemented metaphor in the Silver Age changes from the instrument of expressing "mystical experiences" to the postsymbolic concept of "Logos", "The Word as such". In socialist realism, the implemented metaphor was either perceived as a formal outlier or was subordinate to the ideas of the "tamed avant-garde" of constructivism. And in exile, poets relied on the idea of inheriting post-symbolism or surrealism. The "Thaw" period is transitional for the history of metaphor. Two new types of metaphor: carnalization and metabola: deconstruction, the desolation of discourse, and reconstruction, the formation of a special metaphysical space ("metareality"). Thus, the metabola arises as an instrument of constructing complex poetic metaphysics taking in account discoveries in the field of of phylosophy and science (multiverse concept).Π ΠΊΠΎΠ½ΡΠ΅ 1980-Ρ
Π³Π³. Π²ΠΎΠ·Π½ΠΈΠΊΠ°Π΅Ρ ΠΏΠΎΡΡΠΈΡΠ΅ΡΠΊΠ°Ρ ΡΠΊΠΎΠ»Π° ΠΌΠ΅ΡΠ°ΡΠ΅Π°Π»ΠΈΠ·ΠΌΠ° Ρ ΠΎΡΠΎΠ±ΡΠΌ ΠΎΠ±ΡΠ°Π·Π½ΡΠΌ ΡΠ·ΡΠΊΠΎΠΌ ΠΈ ΡΠΈΠΏΠΎΠΌ ΡΡΠΎΠΏΠ°, ΠΌΠ΅ΡΠ°Π±ΠΎΠ»ΠΎΠΉ. Π ΠΎΡΠ½ΠΎΠ²Π΅ "ΡΡΠ΅ΡΡΠ΅Π³ΠΎ ΡΡΠΎΠΏΠ°" Π»Π΅ΠΆΠΈΡ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌ ΡΠ΅Π°Π»ΠΈΠ·Π°ΡΠΈΠΈ ΠΌΠ΅ΡΠ°ΡΠΎΡΡ, ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π½ΡΠΉ ΡΠ²ΠΎΠ»ΡΡΠΈΠ΅ΠΉ ΠΏΠΎΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ·ΡΠΊΠ° Π² Π₯Π₯ Π²Π΅ΠΊΠ΅. Π ΡΡΠ°ΡΡΠ΅ ΠΏΡΠ΅Π΄ΠΏΡΠΈΠ½ΠΈΠΌΠ°Π΅ΡΡΡ ΠΏΠΎΠΏΡΡΠΊΠ° ΠΏΠΎΠΊΠ°Π·Π°ΡΡ ΠΌΠ΅ΡΡΠΎ ΠΎΠ±ΡΠ°Π·Π½ΠΎΠ³ΠΎ ΡΠ·ΡΠΊΠ° ΠΌΠ΅ΡΠ°ΡΠ΅Π°Π»ΠΈΠ·ΠΌΠ° Π² ΡΠ°Π·Π²ΠΈΡΠΈΠΈ ΡΡΡΡΠΊΠΎΠΉ ΠΏΠΎΡΠ·ΠΈΠΈ. Π Π΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Π½Π½Π°Ρ ΠΌΠ΅ΡΠ°ΡΠΎΡΠ° Π² Π‘Π΅ΡΠ΅Π±ΡΡΠ½ΠΎΠΌ Π²Π΅ΠΊΠ΅ ΠΈΠ·ΠΌΠ΅Π½ΡΠ΅ΡΡΡ ΠΎΡ ΡΡΠ΅Π΄ΡΡΠ²Π° Π²ΡΡΠ°ΠΆΠ΅Π½ΠΈΡ "ΠΌΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠ΅ΡΠ΅ΠΆΠΈΠ²Π°Π½ΠΈΠΉ" ΠΊ ΠΏΠΎΡΡΡΠΈΠΌΠ²ΠΎΠ»ΠΈΡΡΡΠΊΠΎΠΉ ΠΊΠΎΠ½ΡΠ΅ΠΏΡΠΈΠΈ "ΠΠΎΠ³ΠΎΡΠ°", "Π‘Π»ΠΎΠ²Π° ΠΊΠ°ΠΊ ΡΠ°ΠΊΠΎΠ²ΠΎΠ³ΠΎ". Π ΡΠΎΡΡΠ΅Π°Π»ΠΈΠ·ΠΌΠ΅ ΡΠ΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Π½Π½Π°Ρ ΠΌΠ΅ΡΠ°ΡΠΎΡΠ° ΠΈΠ»ΠΈ Π²ΠΎΡΠΏΡΠΈΠ½ΠΈΠΌΠ°Π»Π°ΡΡ ΠΊΠ°ΠΊ ΡΠΎΡΠΌΠ°Π»ΡΠ½ΠΎΠ΅ ΠΈΠ·Π»ΠΈΡΠ΅ΡΡΠ²ΠΎ, ΠΈΠ»ΠΈ ΠΆΠ΅ ΠΏΠΎΠ΄ΡΠΈΠ½ΡΠ»Π°ΡΡ ΠΈΠ΄Π΅ΡΠΌ "ΠΏΡΠΈΡΡΡΠ΅Π½Π½ΠΎΠ³ΠΎ Π°Π²Π°Π½Π³Π°ΡΠ΄Π°" ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠ²ΠΈΠ·ΠΌΠ°. Π ΡΠΌΠΈΠ³ΡΠ°ΡΠΈΠΈ Π²ΠΎΠ·Π½ΠΈΠΊΠ°Π»ΠΈΠΈΠ΄Π΅ΠΈ Π½Π°ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΏΠΎΡΡΡΠΈΠΌΠ²ΠΎΠ»ΠΈΠ·ΠΌΡ ΠΈΠ»ΠΈ ΠΆΠ΅ ΠΎΠΏΠΎΡΠ° Π½Π° ΡΡΡΡΠ΅Π°Π»ΠΈΠ·ΠΌ. ΠΠ΅ΡΠΈΠΎΠ΄ "ΠΡΡΠ΅ΠΏΠ΅Π»ΠΈ" ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΏΠ΅ΡΠ΅Ρ
ΠΎΠ΄Π½ΡΠΌ ΠΈ Π΄Π»Ρ ΠΈΡΡΠΎΡΠΈΠΈ ΠΌΠ΅ΡΠ°ΡΠΎΡΡ. Π‘ ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΠ΅ΠΌ ΠΏΠ°ΡΠ°Π΄ΠΈΠ³ΠΌΡ ΡΡΡΡΠΊΠΎΡΠ·ΡΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΡΡΠΌΠΎΠ΄Π΅ΡΠ½ΠΈΠ·ΠΌΠ°, ΡΠ°ΡΠΏΠ°Π΄Π°ΡΡΠ΅Π³ΠΎΡΡ Π½Π° Π΄Π²Π° ΡΠ΅ΡΠ΅Π½ΠΈΡ - ΠΊΠΎΠ½ΡΠ΅ΠΏΡΡΠ°Π»ΠΈΠ·ΠΌ ΠΈ Π½Π΅ΠΎΠ±Π°ΡΠΎΠΊΠΊΠΎ, Π²ΠΎΠ·Π½ΠΈΠΊΠ°ΡΡ ΠΈ Π΄Π²Π° Π½ΠΎΠ²ΡΡ
ΡΠΈΠΏΠ° ΠΌΠ΅ΡΠ°ΡΠΎΡΡ: ΠΊΠ°ΡΠ½Π°Π»ΠΈΠ·Π°ΡΠΈΡ ΠΈ ΠΌΠ΅ΡΠ°Π±ΠΎΠ»Π°: Π΄Π΅ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΡ, ΠΎΠΏΡΡΡΠΎΡΠ΅Π½ΠΈΠ΅ Π΄ΠΈΡΠΊΡΡΡΠ°, ΠΈ ΡΠ΅ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΡ, ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΎΡΠΎΠ±ΠΎΠ³ΠΎ ΠΌΠ΅ΡΠ°ΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΡΠΎΡΡΡΠ°Π½ΡΡΠ²Π° ("ΠΌΠ΅ΡΠ°ΡΠ΅Π°Π»ΡΠ½ΠΎΡΡΠΈ"). Π’Π°ΠΊΠΈΠΌ ΠΎΠ±ΡΠ°Π·ΠΎΠΌ, ΠΌΠ΅ΡΠ°Π±ΠΎΠ»Π° Π²ΠΎΠ·Π½ΠΈΠΊΠ°Π΅Ρ ΠΊΠ°ΠΊ ΡΡΠ΅Π΄ΡΡΠ²ΠΎ ΠΏΠΎΡΡΡΠΎΠ΅Π½ΠΈΡ ΡΠ»ΠΎΠΆΠ½ΠΎΠΉ ΠΏΠΎΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΌΠ΅ΡΠ°ΡΠΈΠ·ΠΈΠΊΠΈ, ΡΡΠΈΡΡΠ²Π°Ρ ΠΎΡΠΊΡΡΡΠΈΡ Π² ΠΎΠ±Π»Π°ΡΡΠΈ ΡΠΈΠ»ΠΎΡΠΎΡΠΈΠΈ ΠΈ Π½Π°ΡΠΊΠΈ (ΠΊΠΎΠ½ΡΠ΅ΠΏΡΠΈΡ ΠΌΡΠ»ΡΡΠΈΠ²Π΅ΡΡΠ°)
Function of metabola in metaphysics of Andrei Tavrov: the poem "Dirizhabl'"
Poetry of Andrei Tavrov is a continuation of the metaphysical project of metarealism.ΠΠΎΡΠ·ΠΈΡ ΠΠ½Π΄ΡΠ΅Ρ Π’Π°Π²ΡΠΎΠ²Π° ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΏΡΠΎΠ΄ΠΎΠ»ΠΆΠ΅Π½ΠΈΠ΅ΠΌ ΠΌΠ΅ΡΠ°ΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΡΠΎΠ΅ΠΊΡΠ° ΠΌΠ΅ΡΠ°ΡΠ΅Π°Π»ΠΈΠ·ΠΌΠ°
Measurement of qutrits
We proposed the procedure of measuring the unknown state of the three-level
system - the qutrit, which was realized as the arbitrary polarization state of
the single-mode biphoton field. This procedure is accomplished for the set of
the pure states of qutrits; this set is defined by the properties of SU(2)
transformations, that are done by the polarization transformers.Comment: 9 pages, 9 figure
On Exchange of Orbital Angular Momentum Between Twisted Photons and Atomic Electrons
We obtain an expression for the matrix element for a twisted
(Laguerre-Gaussian profile) photon scattering from a hydrogen atom. We consider
photons incoming with an orbital angular momentum (OAM) of ,
carried by a factor of not present in a plane-wave or pure
Gaussian profile beam. The nature of the transfer of units of OAM from
the photon to the azimuthal atomic quantum number of the atom is investigated.
We obtain simple formulae for these OAM flip transitions for elastic forward
scattering of twisted photons when the photon wavelength is large
compared with the atomic target size , and small compared the Rayleigh range
, which characterizes the collimation length of the twisted photon beam.Comment: 16 page
Porosity of silica StΓΆber particles determined by spin-echo small angle neutron scattering.
StΓΆber silica particles are used in a diverse range of applications. Despite their widespread industrial and scientific uses, information on the internal structure of the particles is non-trivial to obtain and is not often reported. In this work we have used spin-echo small angle neutron scattering (SESANS) in conjunction with ultra small angle X-ray scattering (USAXS) and pycnometry to study an aqueous dispersion of StΓΆber particles. Our results are in agreement with models which propose that StΓΆber particles have a porous core, with a significant fraction of the pores inaccessible to solvent. For samples prepared from the same master sample in a range of H2Oβ:βD2O ratio solutions we were able to model the SESANS results for the solution series assuming monodisperse, smooth surfaced spheres of radius 83 nm with an internal open pore volume fraction of 32% and a closed pore fraction of 10%. Our results are consistent with USAXS measurements. The protocol developed and discussed here shows that the SESANS technique is a powerful way to investigate particles much larger than those studied using conventional small angle scattering methods
Feedback cooling of a single trapped ion
Based on a real-time measurement of the motion of a single ion in a Paul
trap, we demonstrate its electro-mechanical cooling below the Doppler limit by
homodyne feedback control (cold damping). The feedback cooling results are well
described by a model based on a quantum mechanical Master Equation.Comment: 4 pages, 3 figure
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