Abstract
The increasing luminosities of future data taking at Large Hadron Collider and next generation collider experiments require an unprecedented amount of simulated events to be produced. Such ...large scale productions demand a significant amount of valuable computing resources. This brings a demand to use new approaches to event generation and simulation of detector responses. In this paper, we discuss the application of generative adversarial networks (GANs) to the simulation of the LHCb experiment events. We emphasize main pitfalls in the application of GANs and study the systematic effects in detail. The presented results are based on the Geant4 simulation of the LHCb Cherenkov detector.
Multipole, nonlinear and anharmonic effects on the optical-lattice-based clocks of Mg atoms are evaluated theoretically. Dipole polarizabilities, hyperpolarizabilities and multipolar polarizabilities ...for Mg atoms are calculated in the single-electron approximation with the use of analytical presentations for the wave and Green's functions in the modified model-potential approach. For comparison, the data are also given for atoms of the group IIb elements (Zn, Cd, Hg).
With the use of second-order perturbation theory in the long-range interatomic interaction for the degenerate states of two Rydberg atoms we have obtained a general formula for the dependence of ...atomic interaction energy on the interatomic distance R in the presence of the Förster resonance. Inside of the 'Förster sphere' (R < RF) this dependence transforms to the formula for electric dipole interaction energy ΔEd − d = C3/R3 and for R > RF it transforms to the formula for the van der Waals interaction energy ΔEVdW = −C6/R6. The van der Waals constant C6 is represented as an expansion in terms of irreducible components which define the dependence on the interatomic axis orientation relative to the quantisation axis of projections M of the total angular momentum J. The numerical values of the irreducible components of tensor C6 were calculated for rubidium atoms in the same Rydberg states |nlJM〉 with large quantum numbers n. We present the calculated resonance interaction energy of two rubidium atoms in the states |43D5/2M〉, whose total energy exceeds by only 8 MHz the total energy of one of the atoms in the state |45P3/2M〉 and of the other in the state |41F7/2M〉.
The possibilities and ways for operational tuning of optical lattice parameters, which make it possible to minimise the frequency-standard uncertainties caused by nonlinear, nondipole, and anharmonic ...effects of interaction of magnesium and calcium atoms with the optical lattice field of a magic wavelength, have been investigated.
The development of optical frequency standards with a relative uncertainty of reproducing the time and frequency units at a level as low as 10−17-10−18 calls for an unprecedented accuracy in ...estimating the role of higher orders of optical nonlinearity, caused by the influence of the optical lattice on the frequency shift of the 'clock transition'. This paper presents a systematic calculation of the contributions of multipole nonlinear anharmonic effects to the error of clocks based on optical lattices for alkaline-earth-like Sr, Yb, and Hg atoms.
Irreducible components determining the dependence of the van der Waals coefficient C 6 ( nlJM ) on the angle θ between the interatomic and the quantisation axes of two Rb atoms in their identical ...Rydberg states nlJM 〉 are evaluated with account of the most contributing terms of the spectral resolution for the bi-atomic Green's function. Asymptotic polynomials in powers of the Rydberg-state principal quantum number n are derived for the C6 irreducible components. Numerical values of the polynomial coefficients are determined for Rb atoms in their n 2 S 1 2 , n 2 P 1 2,3 2 , n 2 D 3 2,5 2 and n 2 F 5 2,7 2 Rydberg states of arbitrary high n. The transformation of the van-der-Waals interaction law − C 6 R 6 into the dipole-dipole law C 3 R 3 in the case of close two-atomic states (the Förster resonance) is considered. Numerical values, the dependences on the magnetic quantum numbers M and on the angle θ of the constant C3 are determined together with the ranges of interatomic distances R, where the interaction law R − 6 transforms into the law of R − 3 .
Modern business conditions contribute to the consideration of the concept of "corporate culture" as one of the main elements of the personnel management system. Today, corporate culture is of great ...importance as a set of features that determine the individuality of each enterprise. The culture of the enterprise is a system of values, a philosophy shared by all employees of the enterprise. The philosophy of the enterprise is formed by traditions, symbols, rituals, legends clear to all employees by which they are guided in daily activity owing to the internal conviction. At the same time, the problem of the influence of international and do-mestic experience on the formation of corporate culture of domestic enterprises requires more detailed study, which determines the relevance of further research. The article examines the world and domestic experience in the formation of corporate culture, analyzes the essence of the concept of corporate culture. The classification of types of corporate culture by the degree of mutual adequacy, by the degree of conformity of the hierarchy, by the content of the dominant values in the organization and depending on the nature of influence is given. The reasons for the unsatisfactory state of implementation of the national corporate culture are clarified. Basic levels and elements of corporate culture are determined. The functions of corporate culture in modern conditions are substantiated. New types of corporate cultures in modern business have been formed. The best examples of components of corporate culture of domestic IT-enterprises are given. It is determined that the key factors that are taken into account in the formation of corporate culture should be: national characteristics, with their negative and positive characteristics, the need to up-date senior management by creating motivational systems and conditions for career growth of young qualified professionals, the need to improve economic methods management. The results of the study can be applied in the process of forming the corporate culture of a modern enterprise.Keywords: corporate culture, management system, labor resources, IT-enterprises, values. У даній оглядовій статті проведено дослідження світового та вітчизняного досвіду формування корпоративної культури, проаналізовано сутність поняття корпоративна культура. Дана класифікація видів корпоративної культури за ступенем взаємоадекватності, за ступенем відповідності ієрархії, за змістом домінуючих в організації цінностей та в залежності від характеру впливу. З'ясовано причини незадовільного стану впровадження національної корпоративної культури. Визначено базові рівні та елементи корпоративної культури. Обґрунтовано функції корпоративної культури в сучасних умовах. Сформовано нові типи корпоративних культур в сучасному бізнесі. Наведено кращі приклади складових корпоративної культури вітчизняних IT-підприємств. Визначено, що ключовими факторами, які враховуються при формуванні корпоративної культури повинні бути: національні особливості, з їх негативними і позитивними характеристиками, необхідність оновлення вищої ланки управління за рахунок створення мотиваційних систем та умов для кар'єрного зростання молодих кваліфікованих фахівців, необхідність вдосконалення економічних методів управління.Ключові слова: корпоративна культура, система управління, трудові ресурси, IT-підприємства, цінності.
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