S. S. Mizrahi

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We found a new kind of soliton solutions for the 5-parameter family of the potential-free Stenflo-Sabatier-Doebner-Goldin nonlinear modifications of the Schrödinger equation. In contradistinction to the " usual " solitons like {cosh [β(x − kt)]} −α exp[i(kx − ωt)], the new Finite-Length Solitons (FLS) are nonanalytical functions with continuous first(More)
We consider a relaxation of a single mode of the quantized field in a presence of one-and two-photon absorption and emission processes. Exact stationary solutions of the master equation for the diagonal elements of the density matrix in the Fock basis are found in the case of completely saturated two-photon emission. If two-photon processes dominate over(More)
  • F Pascoal, L C Céleri, S S Mizrahi, M H Y Moussa, C Farina
  • 2009
We analyze the dynamical Casimir effect for a massless scalar field confined between two concentric spherical shells which impose on the field mixed boundary conditions. We thus complement a previous result [Phys. Rev. A 78, 032521 (2008)], where the same problem was considered but in that case the field was submitted to a Dirichlet boundary condition in(More)
We study the influence of random migration of a species (may be insects) in the population dynamics when initially all the individuals live in a primordial site (their habitats may be trees). We assume (i) a finite number of sites, (ii) that migration occurs randomly to nearest neighbors, and (iii) an on-site age-structured population whose size varies(More)
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