9 research outputs found
The spacetime attribute of matter
We propose that spacetime is fundamentally a property of matter, inseparable
from it. This leads us to suggest that all properties of matter must be
elevated to the same status as that of spacetime in quantum field theories of
matter. We suggest a specific method for extending field theories to accomodate
this, and point out how this leads to the evolution of fields through channels
other than the spacetime channel.Comment: 6 pages, no figures, REVTe
An Update on Cosmological Anisotropy in Electromagnetic Propagation
We review evidence for a new phenomenon in the propagation of radio waves
across the Universe, an anisotropic rotation of the plane of polarization not
accounted for by conventional physics.Comment: 6 pages, 1 figure, LaTeX. Contributed to the Proceedings of the 7th
International Conference on the Intersections of Particle and Nuclear Physics
(Big Sky, Montana, 1997), to be published by the American Institute of
Physics (Editor: T. W. Donnelly). For more information, please see
http://www.cc.rochester.edu/college/rtc/Borge/aniso.htm
Propagation of a short laser pulse in a plasma
The propagation of an electromagnetic pulse in a plasma is studied for pulse
durations that are comparable to the plasma period. When the carrier frequency
of the incident pulse is much higher than the plasma frequency, the pulse
propagates without distortion at its group speed. When the carrier frequency is
comparable to the plasma frequency, the pulse is distorted and leaves behind it
an electromagnetic wake.Comment: 6 pages, 5 figures, REVTeX. To be published in Physical Review E,
vol. 56, December 1, 199
Approximate Analytic Solution for the Spatiotemporal Evolution of Wave Packets undergoing Arbitrary Dispersion
We apply expansion methods to obtain an approximate expression in terms of
elementary functions for the space and time dependence of wave packets in a
dispersive medium. The specific application to pulses in a cold plasma is
considered in detail, and the explicit analytic formula that results is
provided. When certain general initial conditions are satisfied, these
expressions describe the packet evolution quite well. We conclude by employing
the method to exhibit aspects of dispersive pulse propagation in a cold plasma,
and suggest how predicted and experimental effects may be compared to improve
the theoretical description of a medium's dispersive properties.Comment: 17 pages, 4 figures, RevTe
Indication of Anisotropy in Electromagnetic Propagation over Cosmological Distances
We report a systematic rotation of the plane of polarization of
electromagnetic radiation propagating over cosmological distances. The effect
is extracted independently from Faraday rotation, and found to be correlated
with the angular positions and distances to the sources. Monte Carlo analysis
yields probabilistic P-values of order 10^(-3) for this to occur as a
fluctuation. A fit yields a birefringence scale of order 10^(25) meters.
Dependence on redshift z rules out a local effect. Barring hidden systematic
bias in the data, the correlation indicates a new cosmological effect.Comment: 5 pages, 1 figure, ReVTeX. For more information, see
http://www.cc.rochester.edu/college/rtc/Borge/aniso.htm