A. V. Alekseev

Pseudospin quantum acoustics in liquids

Abstract We call attention to the fact that data on spin-lattice relaxation in liqudis can give information about the rate of resonant acoustic transitions in substances where ordinary electron paramagnetic resonance (epr) and nuclear magnetic resonance (nmr) have been studied. Secondly it is shown that sound coherence may be exploited to discriminate between effects of stochastic Brownian motion and sound exitation. Preliminary experimental data are presented on the sound modulation of the proton spin-echoes in water with magnetic dipoles Cu 2+ .

The Recoilness Emission and Reception of γ-Gravitons in Laboratory and Cosmic Conditions

Abstract The theoretical consideration of the sponteneous emission of γ-gravitons by excited nuclei lead us to the conclusion about the principle possibility of γ-graviton detection from cosmic and laboratory sources. The γ-graviton astronomy and geophysics can give new information about cosmic and geophysical processes.

Quantum Pseudospin Acoustics in Liquids

The realization of Zavoiski’s ideas concerning acoustic EPR and NMR in fluids are discussed. A general relation between heat fluctuations and sound perturbations is found. Formulas for dipole-dipole and hyperfine AEPR and ANMR are derived. Experimental results for sound modulation of proton spin echoes in aqueous solutions of CuSO4·5H2O are presented.

Comments on the photon echoes

Abstract The coherent light pulses obtained in the experiments of light echoes type [1] (as induction and echoes signals) and generated by the electric dipole system bring the information about the dynamical properties of the dipole system and are used for the registration of that information. As to the dynamics of the emitted photons them-selves at the present time the effects of pulse form changing [2] and self-induced transperancy [3] caused by the photon system interaction with the matter were taken into consideration only. In this work we discuss the memory effects of the system of photons itself spreading into the vacuum. The discussed effect is the method of the space-time coherence re-establishment of the laser radiation on the basis of application the effect which we called the photon echoes. The point of the method is in the plural reflection of electromagnetic radiation from the mirrors which gives the steady-state conditions of the electromagnetic wave spreading and is caused by diffraction. I...

The Influence of the Dipole-Dipole Interactions on the Phonon Induction

Abstract It is shown that the none quilibrium state of the dipole-dipole reservoir in paramagnetic and paraelectric systems can stimulate the generation of the coherent spontaneous radiation essentially. At the same time the uncoherent spontaneous radiation and coherent induced (in the Einstein sense) radiation canN′t be amplified in this conditions essentially. Moreover the electromagnetic and acoustic maser-effects and uncoherent apontaneous radiation completely disappear in the limit case of enough small absolute values of the dipole-dipole system (DDS) temperature. The nuclear polarization is also absent at enough low absolute electron-nuclear and nuclear-nuclear DDS temperatures. All of these consequences follow from the obvious trace property of the product of n-particle density matrix operators and operators of observable quantities constituted from m-particle operators: this trace is identically equal to zero if m > n (all n or m particles are different).