Рогачев А. В., Пруцков Г. В. В кн.: Научно-техническая конференция студентов, аспирантов и молодых специалистов НИУ ВШЭ им. Е.В. Арменского. Материалы конференции. М.: МИЭМ НИУ ВШЭ, 2015. С. 250-250.
Added: Jul 22, 2015
Peltonen J., Astafiev O., Korneeva Y. et al. Physical Review B: Condensed Matter and Materials Physics. 2013. Vol. 88. P. 220506-1-220506-5.
We demonstrate evidence of coherent magnetic flux tunneling through superconducting nanowires patterned in a thin highly disordered NbN film. The phenomenon is revealed as a superposition of flux states in a fully metallic superconducting loop with the nanowire acting as an effective tunnel barrier for the magnetic flux, and reproducibly observed in different wires. The flux superposition achieved in the fully metallic NbN rings proves the universality of the phenomenon previously reported for InOx .We perform microwave spectroscopy and study the tunneling amplitude as a function of the wire width, compare the experimental results with theories, and estimate the parameters for existing theoretical models.
Added: Mar 13, 2014
Семенов А., Девятов И.,
Гольцман Г.Н. и др. М.: Прометей (МПГУ), 2013.
Added: Mar 7, 2014
Arutyunov K., Ramos-Alvares A., Semenov A. et al. arXive. 1602.07932. Cornell University Library, 2016
The topic of superconductivity in strongly disordered materials has attracted a significant attention. In particular vivid debates are related to the subject of intrinsic spatial inhomogeneity responsible for non-BCS relation between the superconducting gap and the pairing potential. Here we report experimental study of electron transport properties of narrow NbN nanowires with effective cross sections of the order of the debated inhomogeneity scales. We find that conventional models based on phase slip concept provide reasonable fits for the shape of the R(T) transition curve. Temperature dependence of the critical current follows the text-book Ginzburg-Landau prediction for quasi-one-dimensional superconducting channel Ic~(1-T/Tc)3/2. Hence, one may conclude that the intrinsic electronic inhomogeneity either does not exist in our structures, or, if exist, does not affect their resistive state properties.
Added: Mar 22, 2016
Рябчун С. А., Третьяков И. В., Финкель М. И. и др. М.: Прометей (МПГУ), 2011.
Added: Jul 1, 2014
Eminov P. A.,
Ul’din A.,
Sezonov Y. I. et al. Russian Journal of Mathematical Physics. 2010. Vol. 17. No. 2.
P. 154-158.
The thermodynamical potential of a superconducting quantum cylinder is calculated. The dependence of the critical temperature and the heat capacity of a superconducting system of the surface concentration of electrons and on the radius of the nanotube is studied.
Added: Apr 12, 2012
Overview This book concisely presents the latest trends in the physics of superconductivity and superfluidity and magnetismin novel systems, as well as the problem of BCS-BEC crossover in ultracold quantum gases and high-Tc superconductors. It further illuminates the intensive exchange of ideas between these closely related fields of condensed matter physics over the last 30 years of their dynamic development. The content is based on the author’s original findings obtained at the Kapitza Institute, as well as advanced lecture courses he held at the Moscow Engineering Physical Institute, Amsterdam University, Loughborough University and LPTMS Orsay between 1994 and 2011. In addition to the findings of his group, the author discusses the most recent concepts in these fields, obtained both in Russia and in the West. The book consists of 16 chapters which are divided into four parts. The first part describes recent developments in superfluid hydrodynamics of quantum fluids and solids, including the fashionable subject of possible supersolidity in quantum crystals of 4He, while the second describes BCS-BEC crossover in quantum Fermi-Bose gases and mixtures, as well as in the underdoped states of cuprates. The third part is devoted to non-phonon mechanisms of superconductivity in unconventional (anomalous) superconductors, including some important aspects of the theory of high-Tc superconductivity. |The last part considers the anomalous normal state of novel superconductive materials and materials with colossal magnetoresistance (CMR). The book offers a valuable guide for senior-level undergraduate students and graduate students, postdoctoral and other researchers specializing in solid-state and low-temperature physics.
Added: Feb 17, 2014
Эминов П. А.,
Гордеева С. В. Доклады Академии наук. 2013. Т. 58. № 6.
С. 236-239.
Added: Sep 11, 2013
Marshakov A., Fock V. arxiv.org. math. Cornell University, 2014
We describe a class of integrable systems on Poisson submanifolds of the affine Poisson-Lie groups PGLˆ(N), which can be enumerated by cyclically irreducible elements the co-extended affine Weyl groups (Wˆ×Wˆ)♯. Their phase spaces admit cluster coordinates, whereas the integrals of motion are cluster functions. We show, that this class of integrable systems coincides with the constructed by Goncharov and Kenyon out of dimer models on a two-dimensional torus and classified by the Newton polygons. We construct the correspondence between the Weyl group elements and polygons, demonstrating that each particular integrable model admits infinitely many realisations on the Poisson-Lie groups. We also discuss the particular examples, including the relativistic Toda chains and the Schwartz-Ovsienko-Tabachnikov pentagram map.
Added: Oct 29, 2014
М.: МИЭМ НИУ ВШЭ, 2016.
Added: Mar 7, 2016
2015.
Added: Aug 10, 2015
Sadovskii M. V.,
Pudalov V.M. Journal of Superconductivity and Novel Magnetism. 2016. Vol. 29. No. 4.
P. 1035-1036.
Added: Feb 23, 2017
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
Added: Feb 3, 2017
Zlotnik Alexander, Zlotnik Ilya. arxiv.org. math. Cornell University, 2014. No. arXiv:1405.3147.
We consider the Cauchy problem for the 1D generalized Schrödinger equation on the whole axis. To solve it, any order finite element in space and the Crank-Nicolson in time method with the discrete transpa\-rent boundary conditions (TBCs) has recently been constructed. Now we engage the Richardson extrapolation to improve significantly the accuracy in time step. To study its properties, we give results of numerical experiments and enlarged practical error analysis for three typical examples. The resulting method is able to provide high precision results in the uniform norm for reasonable computational costs that is unreachable by more common 2nd order methods in either space or time step. Comparing our results to the previous ones, we obtain much more accurate results using much less amount of both elements and time steps.
Added: May 14, 2014
Балашов В. А., Злотник А.А., Савенков Е. Б. Институт прикладной математики им. М.В. Келдыша Российской академии наук, 2016. № 89.
A study of the barotropic quasi-hydrodynamic system of equations for the two-phase two-component mixture involving the surface tension and stationary potential force is accomplished. Under fairly general assumptions on the Helmholtz free energy of the mixture, the~energy balance equation with non-positive energy production together with its corollary, the law of non-increasing total energy, are derived; in particular, both the isothermal and isentropic cases are covered. Under additional assumptions, the necessary and sufficient conditions for the linearized stability of constant solutions are derived (it does not take place always). A finite-difference approximation of the problem is constructed in the 2D periodic case for a non-uniform rectangular mesh. Approximation of the capillary stress tensor is improved in the momentum balance equation thus increasing the quality of numerical solutions. The results of numerical experiments are presented. They demonstrate the ability of the model to ensure the qualitatively correct description for the dynamics of surface effects as well as applicability of the linearized stability criterion in the original nonlinear statement.
Added: Sep 30, 2016
Novikov L., Mileev V., Voronina E. et al. Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques. 2009. Vol. 3. No. 2. P. 199-214.
Radiation conditions are described for various space regions, radiation-induced effects in spacecraft materials and equipment components are considered and information on theoretical, computational, and experimental methods for studying radiation effects are presented. The peculiarities of radiation effects on nanostructures and some problems related to modeling and radiation testing of such structures are considered.
Added: Mar 2, 2015
Dudin A. Vol. 356: Modern Probabilistic Methods for Analysis of Telecommunication Networks. Belorusian Winter Workshops in Queueing Theory, BWWQT 2013 . Heidelberg; NY; Dordrecht; L.: Springer Verlag, 2013.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
Added: Jul 21, 2013
Гунько М., Зотова М.,
Кашницкий И. С. и др. М.: Институт географии РАН, 2013.
Added: Dec 12, 2013
The paper aims at assessing indicators and individual elements of e-government of selected countries in 2009-2010, and the interrelation of e-government with corruption in the public sector. The authors explore possible causal and dependency relations of the established interlink between e-government and public sector corruption. Although it is universally acknowledged that corruption is an evil, there is much debate over which determinants of corruption are important. Using econometric analysis for sizeable country samples the authors verified the closeness of interrelation between e-government indicators and ICT Development Index indicators, such as online services quality and ICT usage, on one hand, and the level of perceived public sector corruption, on the other hand. The major research papers were analyzed, along with international rankings and databases of international organizations. Based on the analysis recommendations for overcoming international e-government measurement constraints are put forward, as well as suggestions for future studies of the topic.
Added: Mar 4, 2013
Лемешко Н. В., Захарова С. С. Труды Научно-исследовательского института радио. 2013. № 1. С. 40-45.
Added: Dec 16, 2013
Кн. 2: Разработка моделей надёжности для проектных исследований надёжности радиоэлектронной аппаратуры. М.: МИЭМ, 2010.
Added: Feb 12, 2013
Karpov A. V. Science, Technology and Innovation. WP BRP. Высшая школа экономики, 2012. No. 03.
The publication credit allocation problem is one of the fundamental problems in bibliometrics. The solution of this problem provides the basis of further research. There are two solutions which do not require any additional information: equal weights measure and Shapley value. Until recently Shapley value is not used because of hardness of computing. The paper justifies the equal weights measure by showing equivalence with the Shapley value approach for sharing coauthors performance in specific games.
Added: Jan 17, 2013
Захарова С. С., Лемешко Н. В. Труды Научно-исследовательского института радио. 2012. № 4. С. 48-54.
Added: Dec 16, 2013
Gokhberg L.,
Fursov K.,
Perani G. Working Party of National Experts on Science and Technology Indicators. DSTI/EAS/STP/NESTI. Organisation for Economic Co-operation and Development, 2012. No. DSTI/EAS/STP/NESTI(2012)9/ANN1.
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.
Added: Jan 9, 2013