Showing papers in "Physics-Uspekhi in 1968"
11,835 citations
TL;DR: In this article, the authors studied the effect of nonlinear optical effects on self-focusing beams in the field of self-focus and Parametric Amplification in a nonlinear medium.
Abstract: CONTENTS 1. Introduction 609 2. Geometrical Optics of a Nonlinear Medium (Equations, Focal Points, Nonlinear Aberrations, Nonstationary Processes) 617 3. Wave Optics of a Nonlinear Medium (Diffraction Corrections to the Self-focusing Length, Formation of Proper Optical Waveguide, Nonstationary Processes) 624 4. Nonlinear Optical Effects in the Field of Self-focusing Beams (Stimulated Scattering in Liquids, Experimental Data, Self-focusing and Parametric Amplification) 629 5. Conclusion (Unsolved Problems, Diffraction in Nonlinear Interactions) 632 Cited Literature 634
1,003 citations
TL;DR: The seminal paper by Ya. B. Zeldovich as discussed by the authors is reprinted here, together with an editorial comment on its lasting scientific relevance, and a biography of the author, as well as a detailed discussion of its application in the field of particle physics.
Abstract: The seminal paper by Ya. B. Zeldovich (Soviet Physics Uspekhi 11, 381–393, 1968) is reprinted here, together with an editorial comment on its lasting scientific relevance, and a biography of the author.
735 citations
TL;DR: In this paper, the second sound in dielectrics has been investigated and the effect of higher-order anharmonicity on transfer processes in solids at low temperatures.
Abstract: Introduction I. Kinetic Phenomena in Dielectrics 256 1. Statement of the Problem 256 2. Hydrodynamic Mechanism of Thermal Conductivity 257 3. Influence of Higher-order Anharmonicity on Transfer Processes in Solids at Low Temperatures 259 4. Second Sound in Dielectrics 260 II. Kinetic Phenomena in Metals 5. Electrical Conductivity of Metals at Low Temperatures 262 6. Electrical Conductivity of Thin Samples 264 7. Electrical Conductivity of Bulk Samples 266 8. High-frequency Properties 268 References 269
322 citations
TL;DR: In this paper, the authors proposed a solution to the linearized equations of the problem of dispersion of longitudinal waves in an electron gas with a Fermi distribution function, and the solution was shown to be correct.
Abstract: 1. Statement of the problem 721 2. Initial equations and their simplification 722 3. Solution of the linearized equations 724 4. Dispersion of longitudinal waves 728 5. Dispersion of longitudinal waves in an electron gas with a Fermi distribution function 730 6. Dispersion of transverse waves 732 7. Summary and conclusion 733
272 citations
TL;DR: In this paper, Dokl. Akad. Nauk SSSR 30, 299 (1941), Submitted originally December 28, 1940, and originally published December 14, 1940.
Abstract: Reprinted from Dokl. Akad. Nauk SSSR 30, 299 (1941), Submitted originally December 28, 1940.
221 citations
TL;DR: In this paper, the Stark effect in a constant electric field was studied by using double radio-optical resonance (DRS) and Radiospectroscopic Methods (RMS) to measure the shifts of the center of gravity of Absorption Lines in Atomic Beams.
Abstract: CONTENTS I. Introduction 637 II. Theory of the Stark Effect 638 1. The Stark Effect in a Constant Electric Field 638 2. The Stark Effect in Alternating Electric Fields 640 III. The Study of the Stark Effect in a Constant Electric Field 643 1. Observation of the Shifts of Centers of Gravity of Absorption Lines in Atomic Beams 643 2. Study of the Stark Effect by Observation of Electric Double Refraction 644 3. Study of the Stark Effect by the Method of Comparison with Hyperfine Splitting 646 4. Observation of the Stark Effect by Radiospectroscopic Methods 646 5. Study of the Stark Effect by the Method of Double Radiooptical Resonance 647 6. Observation of the Stark Effect by Level-crossing and Beat Methods 649 IV. The Study of the Stark Effect in Fields of Optical Frequency 651 1. Observation of Shifts and Splittings of Levels of the Ground State of Hg199 by Resonance Light 651 2. Observation of Shifts and Splittings of Levels of Potassium Atoms in the Radiation Field of a Ruby Laser 653 V. Conclusion 654 Literature Cited 656
109 citations
TL;DR: In this article, a two-band model and Extremum of Band was proposed to measure the Fermi Momenta in Experiments with Ultrasound and by determining the cutoff of the cyclotron Resonance.
Abstract: CONTENTS Introduction 1 I. Space Lattice 2 II. Doubling of the Period 2 III. Electron Energy Spectrum 4 1. Expansion Near Extremum 4 2. Two-band Model 4 3. Deformation Theory 6 IV. Electron Spectrum in a Constant Magnetic Field 8 1. Classical Limit 8 2. Two-band Model and Extremum of Band 9 3. Quasiclassical Quantization 9 V. Specific Heat 10 VI. Magnetic Susceptibility 10 VII. Quantum Oscillations of the Susceptibility and of Other Thermodynamic and Kinetic Quantities 11 VIII. Electric Conductivity 14 1. Static Conductivity in a Constant Magnetic Field 14 2. Conductivity in the Absence of Constant Magnetic Field 14 3. Cyclotron Resonance 15 4. Magnetoplasma Waves 17 5. Optical Properties in the Infrared Region 19 IX. Measurement of the Fermi Momenta in Experiments with Ultrasound and by Determining the Cutoff of the Cyclotron Resonance 20 X. Tunnel Effect 20 XI. Phonon Spectrum 20 XII. Cited Literature 20
64 citations
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44 citations
38 citations
TL;DR: In this paper, a theory of optical properties of atmospheric aerosols is presented, as well as optical methods of investigating the atmosphere as part of the General Problem of Indirect Measurements.
Abstract: CONTENTS 1. Introduction 353 2. Certain Information on the Atmospheric Aerosol 355 3. Theory of Optical Properties of Aerosol 358 4. Optical Methods of Investigating the Atmosphere as Part of the General Problem of Indirect Measurements 362 5. Optical Properties of Aerosol and Microphysics of the Dispersed Phase 365 6. Aerosol Structure of the Atmosphere and Vertical Variation of the Scattering Coefficient 371 Literature 376
TL;DR: A review of work of Soviet Physicists can be found in this paper, where the authors discuss organizational problems, general problems of theoretical physics, elementary particle physics, and physics of the atomic nucleus.
Abstract: CONTENTS I. Physics in Russia Before the Revolution and Start of Organization of Soviet Physics 678 II. Review of Work of Soviet Physicists 686 General Problems of Theoretical Physics 686 Elementary Particle Physics 688 Physics of the Atomic Nucleus 693 Plasma Physics 697 Optics. Physics of Atoms and Molecules 697 Quantum Electronics 705 Radiophysics and Theory of Oscillations 706 Low Temperatures 709 Physics of Dielectrics 712 Physics of Semiconductors 713 Mechanical Properties of Solids 715 Magnetism 716 Acoustics 718 III. Organizational Problems. Scientific literature 718