Now showing items 11-20 of 854
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 ...
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 ...
Radiation-affected laminar flame propagation
(Elsevier, 1982)
Increased laminar flame thickness and flame speed under the influence of radiation is shown in terms of an original heat transfer number where is the weighted nongreyness, [kappa]p and [kappa]R are the Planck mean and ...
Universality in the Thomas-Fermi-von Weizsäcker model of atoms and molecules
(Springer-Verlag, 1990-05)
We study the Thomas-Fermi-von Weizsäcker theory of atoms and molecules. The main result is to prove universality of the structure of very large atoms and molecules, i.e., proving that the structure converges as the nuclear ...
A mass zero cluster expansion. Part 1: The Expansion
(Springer-Verlag, 1981-09)
A cluster expansion is developed and applied to study the perturbation λ(Δφ) 4 of the massless lattice field φ in dimension 3. The method is loosely inspired by the work of Gawedzki and Kupiainen on block spin techniques ...
Conservation laws and symmetries of generalized sine-Gordon equations
(Springer-Verlag, 1981-06)
We study some systems of non-linear PDE's (Eqs. 1.1 below) which can be regarded either as generalizations of the sine-Gordon equation or as two-dimensional versions of the Toda lattice equations. We show that these systems ...
Ionization and Scattering for Short-Lived Potentials
(Kluwer Academic Publishers; Springer Science+Business Media, 1999-06)
We consider perturbations of a model quantum system consisting of a single bound state and continuum radiation modes. In many problems involving the interaction of matter and radiation, one is interested in the effect of ...
Modification of Stokes' law for a heated sphere in liquid helium II
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1971-07)
It is shown that the counterflow which occurs at low heat inputs in liquid helium below the λ point modifies the wake behind a steadily moving sphere. The result is valid for a low Reynolds number and limits on the range ...
Why ring regenerative amplification (regen)?
(Springer-Verlag, 2002-06)
We show that ring cavity regenerative amplifiers (regens) have distinct advantages over the linear ones for applications in chirped pulse amplification. Larger energy, better contrast and better isolation from the oscillator ...
An Adaptively Refined Cartesian Mesh Solver for the Euler Equations
(Elsevier, 1993-01)
A method for adaptive refinement of a Cartesian mesh for the solution of the steady Euler equations is presented. The algorithm creates an initial uniform mesh and cuts the body out of that mesh. The mesh is then refined ...