Now showing items 41-50 of 3754
Euclidean Fermi fields with a hermitean Feynman-Kac-Nelson formula. I
(Springer-Verlag, 1974-03)
We construct free, Euclidean, spin one-half, quantum fields with the following properties: (i) CAR; (ii) Symanzik positivity; (iii) Osterwalder-Schrader positivity; (iv) no doubling of particle or spin states. They admit ...
Holography, diffeomorphisms, and scaling violations in the CMB
(IOP Publishing Ltd, 2004-07-01)
We analyze diffeomorphism invariance in inflationary spacetimes regulated by a boundary at late time. We present the action for quadratic fluctuations in the presence of a boundary, and verify that it is gauge invariant ...
Absence of goldstino decoupling in hierarchical superunified models
(Elsevier, 1983-08-25)
It is shown that there exist a class of hierarchical supersymmetric unified models in which the Goldstino field does not decouple from that light states. We illustrate this with an SUN model. The phenomenology and cosmology ...
Measurement of sonic velocity in liquid Refrigerant 12
(The American Institute of Physics, 1977-08)
The sonic velocity in subcooled liquid Refrigerant 12 (CCl2F2) was measured at 26.7 °C using an apparatus designed to investigate transients associated with pipe blowdown. The mean value for sonic velocity obtained from ...
Efficient algorithms for estimating the width of nearly normal distributions
(Elsevier, 1983-06-15)
Typical physics data samples often conform to Gaussian distributions with admixtures of more slowly varying backgrounds. Under such circumstances the standard deviation is known to be a poor statistical measure of distribution ...
Behavior of Gas Bubbles in Viscoelastic Materials in a Creep Process
(The American Institute of Physics, 1972-07)
This paper investigates the dynamic behavior of a spherical bubble situated in viscoelastic (or elasticoviscous) materials in a creep process. Both the diffusion of the dissolved gas in the material and the thermodynamic ...
Brownian dynamics simulations with stiff finitely extensible nonlinear elastic-Fraenkel springs as approximations to rods in bead-rod models
(The American Institute of Physics, 2006-01-28)
A very stiff finitely extensible nonlinear elastic (FENE)-Fraenkel spring is proposed to replace the rigid rod in the bead-rod model. This allows the adoption of a fast predictor-corrector method so that large time steps ...
Large scale surface structure formed during GaAs (001) homoepitaxy
(The American Institute of Physics, 1994-02-14)
Atomic force microscopy studies have been performed on GaAs (001) homoepitaxy films grown by molecular beam epitaxy. Multilayered features are seen to evolve when the growth conditions favor island nucleation. As the ...
Use Of The BigSol Time Of Flight Spectrometer In The Study Of Superheavy Element Production
(The American Institute of Physics, 2011-06-01)