52 research outputs found
On the feasibility of a nuclear exciton laser
Nuclear excitons known from M\"ossbauer spectroscopy describe coherent
excitations of a large number of nuclei -- analogous to Dicke states (or Dicke
super-radiance) in quantum optics. In this paper, we study the possibility of
constructing a laser based on these coherent excitations. In contrast to the
free electron laser (in its usual design), such a device would be based on
stimulated emission and thus might offer certain advantages, e.g., regarding
energy-momentum accuracy. Unfortunately, inserting realistic parameters, the
window of operability is probably not open (yet) to present-day technology --
but our design should be feasible in the UV regime, for example.Comment: 7 pages RevTeX, 4 figure
Coherent Schwinger Interaction from Darboux Transformation
The exactly solvable scalar-tensor potential of the four-component Dirac
equation has been obtained by the Darboux transformation method. The
constructed potential has been interpreted in terms of nucleon-nucleon and
Schwinger interactions of neutral particles with lattice sites during their
channeling Hamiltonians of a Schwinger type is obtained by means of the Darboux
transformation chain. The analitic structure of the Lyapunov function of
periodic continuation for each of the Hamiltonians of the family is considered.Comment: 12 pages, Latex, six figures; six sections, one figure adde
Critical Review of Theoretical Models for Anomalous Effects (Cold Fusion) in Deuterated Metals
We briefly summarize the reported anomalous effects in deuterated metals at
ambient temperature, commonly known as "Cold Fusion" (CF), with an emphasis on
important experiments as well as the theoretical basis for the opposition to
interpreting them as cold fusion. Then we critically examine more than 25
theoretical models for CF, including unusual nuclear and exotic chemical
hypotheses. We conclude that they do not explain the data.Comment: 51 pages, 4 Figure
Generation of intense directional radiation during the fast motion of a liquid jet through a narrow dielectric channel
Enhancing the efficiency of coherent processing of chaotic signals during the transmission of binary messages using surrogate signals
A method has been proposed for reducing the influence of noise in observations of chaotic carrier during the binary message transmission using the technology of surrogate data generated with due regard for maintaining the signal attractor in phase space. The impact of the correlation of observation noise and its difference from the Gaussian noise on the probability of correct separation of one message bit is analyzed
Quasi-solitons of magnetostatic waves in a two-layer structure under single-mode excitation
Modulation Instability of Magnetostatic Waves in a Magnetically Coupled Two-Layer Structure
Physical properties of knee joint ligaments of mammals in regard to their structural features
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