Interference of Hydrogen Atom 2P(1/2) State in a Field of a Few Small Perturbations

The interference of hydrogen atom 2P(1/2) state in a field of a few small overlapping perturbations is considered in view of further applications to experimental data interpretation. On a basis of this model two new experiments are proposed which can clarify some features of Sokolov effect.Comment: 14 pages with 3 figure

Plasma dispersion of multisubband electron systems over liquid helium

Density-density response functions are evaluated for nondegenerate multisubband electron systems in the random-phase approximation for arbitrary wave number and subband index. We consider both quasi-two-dimensional and quasi-one- dimensional systems for electrons confined to the surface of liquid helium. The dispersion relations of longitudinal intrasubband and transverse intersubband modes are calculated at low temperatures and for long wavelengths. We discuss the effects of screening and two-subband occupancy on the plasmon spectrum. The characteristic absorption edge of the intersubband modes is shifted relatively to the single-particle intersubband separation and the depolarization shift correction can be significant at high electron densities

Hyperfine Level Splitting for Hydrogen-Like Ions due to Rotation-Spin Coupling

The theoretical aspects of spin-rotation coupling are presented. The approach is based on the general covariance principle. It is shown that the gyrogravitational ratio of the bare spin-1/2 and the spin-1 particles is equal unity. That is why spin couples with rotation as an ordinary angular momentum. This result is the rigorous substantiation of the cranking model. To observe the phenomenon, the experiment with hydrogen-like ions in a storage ring is suggested. It is found that the splitting of the $1 ^2!S_{1/2}, F=1/2$ hyperfine state of the $^{140}{\rm Pr}^{58+}$ and $^{142}{\rm Pm}^{60+}$ ions circulating in the storage ring ESR in Darmstadt along a helical trajectory is about 4.5 MHz. We argue that such splitting can be experimentally determined by means of the ionic interferometry.Comment: 6 pages, final versio

Coupled phonon-ripplon modes in a single wire of electrons on the liquid-helium surface

The coupled phonon-ripplon modes of the quasi-one-dimensional electron chain on the liquid helium sutface are studied. It is shown that the electron-ripplon coupling leads to the splitting of the collective modes of the wire with the appearance of low-frequency modes and high-frequency optical modes starting from threshold frequencies. The effective masses of an electron plus the associated dimple for low frequency modes are estimated and the values of the threshold frequencies are calculated. The results obtained can be used in experimental attempts to observe the phase transition of the electron wire into a quasi-ordered phase.Comment: 5 pages, 1 figure, Physical Review (in press

Pseudo-epsilon expansion and the two-dimensional Ising model

Starting from the five-loop renormalization-group expansions for the two-dimensional Euclidean scalar \phi^4 field theory (field-theoretical version of two-dimensional Ising model), pseudo-\epsilon expansions for the Wilson fixed point coordinate g*, critical exponents, and the sextic effective coupling constant g_6 are obtained. Pseudo-\epsilon expansions for g*, inverse susceptibility exponent \gamma, and g_6 are found to possess a remarkable property - higher-order terms in these expansions turn out to be so small that accurate enough numerical estimates can be obtained using simple Pade approximants, i. e. without addressing resummation procedures based upon the Borel transformation.Comment: 4 pages, 4 tables, few misprints avoide

JIT Philosophy in Modern Management Cost Accounting and Performance Management Systems

Currently, traditional cost accounting methods are losing their relevance. Modern production environment is unpredictable and customer-oriented. Product life cycle becomes shorter, and consumers’ tastes are more capricious and fickle. All these factors suggest the need for flexible and adaptive control schemes.Successful decision-making is determined by well-built cost accounting system. The article proposes on the basis of the symbiosis of “just-in-time” approach, adherence to the principles of continuous improvement, and cost accounting methods — Kaizen-costing, standard-costing, target-costing, time-driven activity based costing, backflush accounting and value stream costing — to develop business performance management system that meets the needs of the modern business environment. The principles of continuous improvement, integrated into «Just In Time” management system, expand the horizon of opportunities for strategic management accounting. Zero-inventory philosophy, combined with flexible and adaptable management schemes, can also provide a powerful competitive advantage. The article recommends a system of key performance indicators to monitor the implementation of “Just in Time” philosophy in the symbiosis with these cost accounting methods. Zero-inventory approach has a number of drawbacks. However, integration of concepts with advanced cost accounting techniques will partly offset these shortcomings.The purpose of the article is to study the possibility of integration of «Just in Time” philosophy and advanced cost accounting methods, with respect to their features and peculiarities. The theoretical basis is the hypothesis of improving business performance management system based on “Just in Time” management approach, through its integration with the principles of continuous improvement and modern management approaches, quality assurance and approval.The main result of the article is an enhanced management accounting tools that allow to respond to changes in the environment of the company, develop measures aimed at adapting to these changes and ensuring compliance with the company’s strategy