Correlated states of a quantum oscillator and of a quantum chain of oscillators with a δ bump in frequency

Quantum Radiophysics Division, Lebedev Physics Institute. Translated from Preprint No. 139 of the Lebedev Physics Institute, Russian Academy of Sciences, Moscow, 1991.     

Coupling an injection laser to a single-mode optical fiberguide with the aid of a microlens in a matching-module system

Optoelectronics Laboratory, Lebedev Physics Institute. Translated from Preprint No. 192 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1989.     

Theoretical and numerical analysis of stresses in a laser hardening model

Kuibyshev Branch of the Lebedev Physics Institute. Translated from Preprint No. 167 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1990.     

Holographic registration of a one-dimensional optical signal using a nonstationary reference wave,and its analysis

We consider a method of holographic registration of laser emission modulated by interaction with an object or a medium whose optical properties vary with time and along one of the coordinates. A reference wave whose frequency varies linearly along a coordinate and with time in the registration plane is used. The method makes feasible the implementation of two-exposure holographic interferometry. Information on the temporal, spectral, and phase characteristics as functions of the coordinate can be obtained during the reconstruction stage.Physics and Spectroscopy Division, Lebedev Physics Institute. Translated from Preprint 131, Lebedev Physics Institute of the USSR Academy of Sciences, Moscow, 1989.     

Amplification in a semibounded free-electron laser

A self-consistent analytic expression for the complex gain of a free-electron laser is obtained on the basis of the single-particle equations with realistic boundary conditions. The results are presented in the form of amplitude-frequency and phase-frequency characteristics of a free-electron laser.New-Accelerator Problems Laboratory, Lebedev Physics Institute, Academy of Sciences of the USSR. Translated from Preprint No. 240 of the Lebedev Physics Institute, Academy of Sciences of the USSR, 1988.     

Vertical rotation effect on turbulence characteristics in an open channel flow

This paper solves the three-dimensional Navier-Stokes equation by a fractional-step method with the Reynolds number Reτ=194 and the rotation number Nτ=0-0.12. When Nτ is less than 0.06, the turbulence statistics relevant to the spanwise velocity fluctuation are enhanced, but other statistics are suppressed. When Nτ is larger than 0.06, all the turbulence statistics decrease significantly. Reynolds stress budgets elucidate that turbulence kinetic energy in the vertical direction is transferred into the streamwise and spanwise directions. The flow structures exhibit that the bursting processes near the bottom wall are ejected toward the free surface. Evident change of near-surface streak structures of the velocity fluctuations are revealed.     

Investigation of mode coupling in a multimode superconducting cavity to store and extract UHF energy

Nuclear Physics Scientific Research Institute, Tomsk Polytechnical Institute. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 33, No. 7, pp. 868–875, July, 1990.     

Coherent interaction of an electromagnetic field with a medium of two-level particles and with a superconducting current in a Josephson structure

The propagation of electromagnetic pulses in Josephson structures is investigated theoretically. An analogy with interaction of light pulses with a twolevel medium is traced. Under certain conditions the propagation of electromagnetic radiation in a two-level medium and in a Josephson structure is described by the same wave equation.Lebedev Physics Institute, Academy of Sciences of the USSR, Moscwow. Translated from Preprint No. 233 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1938.     

Analogy between mechanics and optics

Division of Theoretical Physics, Lebedev Physics Institute. Translated from Preprint 114, Lebedev Physics Institute, Moscow, 1990.     

Theoretical Optimization of Neutron and Physical Characteristics of a Multiplying Pulsed Neutron Source Based on a Proton Accelerator

Physics of Particles and Nuclei Letters - The neutron source operating at the Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research (JINR, Dubna, Russia), based on an IBR-2M...     

Calibrating a modulation radiometer

Radio Physics and Electronics Institute, Armenian Academy of Sciences. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 33, No. 7, pp. 782–787, July, 1990.     

Structure of the field of a mode group in a multimode waveguide

Institute of Applied Physics, Academy of Sciences of the USSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 31, No. 6, pp. 725–732, June, 1988.     

Statistical properties of the acoustic field of a moving source in a random inhomogeneous medium in the presence of a rough boundary

Institute of Applied Physics, Russian Academy of Sciences, Nizhegorodskii State University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 35, No. 2, pp. 161–170, February, 1992.     

The conversion of waves in a bent waveguide with a variable curvature

Institute of Applied Physics, Academy of Sciences of the USSR. Translated from Izvestiya Vysshikh Zavedenii, Radiofizika, Vol. 33, No. 6, pp. 726–732, June, 1990.     

Wave beam shaping on diffraction of a whispering gallery wave at a convex cylindrical surface

Institute of Applied Physics, Academy of Sciences of the USSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 31, No. 12, pp. 1482–1487, December, 1988.     

Experimental Setup for Neutron Lifetime Measurements with a Large Gravitational Trap at Low Temperatures

Technical Physics - Currently the most accurate measurements of neutron lifetime are being performed at the Petersburg Nuclear Physics Institute with ultracold neutrons (UCNs) stored in a...     

Dynamical regimes in a laser with two resonant lines of the active medium

P. N. Lebedev Physical Institute, Academy of Sciences of the USSR. Scientific-Research Institute of Mechanics and Physics of Saratov University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 31, No. 3, pp. 300–311, March, 1988.     

Mathematical model of elastoplastic deformation of a mesovolume of material with a finite number of slip systems

Institute of Physics of Strength and Materials Science, Siberian Branch of the Russian Academy of Sciences. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 26–57, November, 1995.     

An ideal integrator in a radiometer

Radio Physics and Electronics Institute, Armenian Academy of Sciences. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 31, No. 8, pp. 903–906, August, 1988.     

Stability and bistability of stationary states in four-wave interaction in a photorefractive medium

The stability of stationary states is investigated analytically and numerically for various four-wave mixing schemes in a photorefractive medium with nonlocal nonlinear response when recorded with a translucent grating. Bistability is indicated for a number of four-wave-mixing schemes and the conditions for its existence are indicated.Quantum-Radiophysics Division, Plasma-Phenomena-Theory Sector, Lebedev Physics Institute. Translated from Preprint No. 138 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1989.