59 citations
7 papers
Semiclassical propagator of the Wigner function
Thomas Dittrich, Luis Sandoval, Carlos Viviescas
Propagation of the Wigner function is studied on two levels of semiclassical propagation, one based on the van-Vleck propagator, the other on phase-space path integration. Leading…
Moments of inertia for solids of revolution and variational methods
Rodolfo A. Diaz, William J. Herrera, R. Martinez
We present some formulae for the moments of inertia of homogeneous solids of revolution in terms of the functions that generate the solids. The development of these expressions exp…
Bead, Hoop, and Spring as a Classical Spontaneous Symmetry Breaking Problem
Fredy Ochoa, Jorge Clavijo
We describe a simple mechanical system that involves Spontaneous Symmetry Breaking. The system consists of two beads constrained to slide along a hoop and attached each other throu…
On the transformation of torques between the laboratory and center of mass reference frames
Rodolfo A. Diaz, William J. Herrera
It is commonly stated in Newtonian Mechanics that the torque with respect to the laboratory frame is equal to the torque with respect to the center of mass frame plus a (R X F) fac…
Quantum anisotropic Heisenberg chains with superlattice structure: a DMRG study
J. Silva-Valencia, J. C. Xavier, E. Miranda
Using the density matrix renormalization group technique, we study spin superlattices composed of a repeated pattern of two spin-1/2 XXZ chains with different anisotropy parameters…
Hilbert spaces with generic groups of automorphisms
Alexander Berenstein
Let G be a countable group. We proof that there is a model companion for the approximate theory of a Hilbert space with a group G of automorphisms. We show that G is amenable if an…