Superhyperfine interactions in Ce3+ doped LiYF4 crystal: ENDOR measurements

The first observation of the resolved Mims electron-nuclear double resonance (ENDOR) spectra from the nearby and remote nuclei of 19F and 7Li nuclei on impurity Ce3+ ions in LiYF4 crystal is reported. It shows that LiYF4:Ce3+ system can be exploited as a convenient matrix for performing spin manipulations and adjusting quantum computation protocols while ENDOR technique could be used for the investigation of electron-nuclear interaction with all the nuclei of the system and exploited for the electron-nuclear spin manipulations.Comment: 4 pages, 2 figures, 1 Table. Reported on Theor-2017 (Kazan, Russia) Conferenc

Problems of procedural rights abuse

In this article, the monographic and scientific publications, the practice of unfair realization of rights by the participants of the process are analyzed based on the analysis of certain international legal act

Características distintivas do apoio administrativo e legal à segurança nacional nos EUA e na Rússia: fundamentos conceituais

This article is devoted to a comparative analysis of the experience of strategic administrative and legal regulation and ensuring national security in the US and Russia. It is established and systematized the distinctive features of the Western (North American) and Eastern (Russian) approaches to the issues of strategic planning and development of policy documents in this area. It is defined common approaches to understanding national security in the US and Russia.Este artículo está dedicado a un análisis comparativo de la experiencia de la regulación administrativa y legal estratégica y a garantizar la seguridad nacional en los EE. UU. Y Rusia. Se establecen y sistematizan las características distintivas de los enfoques occidental (norteamericano) y oriental (ruso) a los temas de planificación estratégica y desarrollo de documentos de políticas en esta área. Se definen enfoques comunes para entender la seguridad nacional en los EE. UU. Y RusiaEste artigo é dedicado a uma análise comparativa da experiência de regulamentação administrativa e legal estratégica e garantindo a segurança nacional nos EUA e na Rússia. Estabelece-se e sistematiza-se as características distintivas das abordagens ocidental (norte-americana) e oriental (russa) para as questões de planejamento estratégico e desenvolvimento de documentos de política nessa área. São definidas abordagens comuns para entender a segurança nacional nos EUA e na Rússia

Harnessing nuclear spin polarization fluctuations in a semiconductor nanowire

Soon after the first measurements of nuclear magnetic resonance (NMR) in a condensed matter system, Bloch predicted the presence of statistical fluctuations proportional to $1/\sqrt{N}$ in the polarization of an ensemble of $N$ spins. First observed by Sleator et al., so-called "spin noise" has recently emerged as a critical ingredient in nanometer-scale magnetic resonance imaging (nanoMRI). This prominence is a direct result of MRI resolution improving to better than 100 nm^3, a size-scale in which statistical spin fluctuations begin to dominate the polarization dynamics. We demonstrate a technique that creates spin order in nanometer-scale ensembles of nuclear spins by harnessing these fluctuations to produce polarizations both larger and narrower than the natural thermal distribution. We focus on ensembles containing ~10^6 phosphorus and hydrogen spins associated with single InP and GaP nanowires (NWs) and their hydrogen-containing adsorbate layers. We monitor, control, and capture fluctuations in the ensemble's spin polarization in real-time and store them for extended periods. This selective capture of large polarization fluctuations may provide a route for enhancing the weak magnetic signals produced by nanometer-scale volumes of nuclear spins. The scheme may also prove useful for initializing the nuclear hyperfine field of electron spin qubits in the solid-state.Comment: 18 pages, 5 figure

Distinctive features of administrative and legal support of national security in the USA and Russia: conceptual foundations

This article is devoted to a comparative analysis of the experience of strategic administrative and legal regulation and ensuring national security in the US and Russia. It is established and systematized the distinctive features of the Western (North American) and Eastern (Russian) approaches to the issues of strategic planning and development of policy documents in this are

Verbal extremism as a form of verbal influence on the recipient

This paper determines through the linguistic analysis the possibilities of verbal extremism aimed at manipulation with the actions and behavior of the recipient. The texts presented online in the Internet telecommunication network are investigated. The communicative attitudes to the control over the recipient's behavior, as well as the linguistic features of their implementation in the text are reveale

Nuclear Magnetic Resonance Imaging with 90 nm Resolution

Magnetic resonance imaging, based on the manipulation and detection of nuclear spins, is a powerful imaging technique that typically operates on the scale of millimeters to microns. Using magnetic resonance force microscopy, we have demonstrated that magnetic resonance imaging of nuclear spins can be extended to a spatial resolution better than 100 nm. The two-dimensional imaging of 19F nuclei was done on a patterned CaF2 test object, and was enabled by a detection sensitivity of roughly 1200 nuclear spins. To achieve this sensitivity, we developed high-moment magnetic tips that produced field gradients up to 1.4x10^6 T/m, and implemented a measurement protocol based on force-gradient detection of naturally occurring spin fluctuations. The resulting detection volume of less than 650 zl represents 60,000x smaller volume than previous NMR microscopy and demonstrates the feasibility of pushing magnetic resonance imaging into the nanoscale regime.Comment: 24 pages, 5 figure

EPR of Pb3+ ion in LiBaF3 crystals

Complex EPR spectra of paramagnetic centers Pb3+ formed in LiBaF3:Pb2+ crystals under X-ray irradiation are studied in the temperature range of 10-150 K. It is shown that lead ions substitute Ba2+ ions in the LiBaF3 crystal and are in the cubic-octahedral 12-fold environment of the fluorine ions. The hyperfine structure constants describing the observed spectrum are determined and parameters of superhyperfine interaction with the nearest fluorine ions are estimated. © Springer-Verlag 2006

Continuous variable entanglement by radiation pressure

We show that the radiation pressure of an intense optical field impinging on a perfectly reflecting vibrating mirror is able to entangle in a robust way the first two optical sideband modes. Under appropriate conditions, the generated entangled state is of EPR type [A. Einstein, {\it et al.}, Phys. Rev. {\bf 47}, 777 (1935)].Comment: 11 pages, 3 figure

Multifrequency EPR and DENR of polyacetylene composite

The organo-inorganic composite MoCl1.9 ± 0.1(C 30 ± 1H30 ± 1), a product of interaction of MoCl5 with C2H2, has been studied by X- and W-band EPR, double electron nuclear resonance, and W-band electron spin echo spectroscopy. The composite consists of nanosized organometallic molybdenum clusters in the polyacetylene matrix. It has been shown that the composite contains three types of magnetic centers: the first is related to the existence of paramagnetic molybdenum atoms in the polyacetylene matrix, and the other two are paramagnetic defects of the matrix. © 2013 Pleiades Publishing, Ltd