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20 papers · 1 filter
Multidimensional Quadrilateral Lattices are Integrable
A. Doliwa, P. M. Santini
The notion of multidimensional quadrilateral lattice is introduced. It is shown that such a lattice is characterized by a system of integrable discrete nonlinear equations. Differe…
Small scale substructure, collapse time and dynamical friction
M. Gambera, A. Pagliaro
We solve numerically the equations of motion for the collapse of a shell of baryonic matter, made of galaxies and substructure of , taking into…
Non-perturbative renormalization group approach for a scalar theory in higher-derivative gravity
Alfio Bonanno, Dario Zappalá
A renormalization group study of a scalar theory coupled to gravity through a general functional dependence on the Ricci scalar in the action is discussed. A set of non-perturbativ…
Laboratory Synthesis of Molecular Hydrogen on Surfaces of Astrophysical Interest
V. Pirronello, Chi Liu, Liyong Shen +1
We report on the first results of experiments to measure the recombination rate of hydrogen on surfaces of astrophysical interest. Our measurements give lower values for the recomb…
One-body dissipation and chaotic dynamics in a classical simulation of a nuclear gas
M. Baldo, G. F. Burgio, A. Rapisarda +1
In order to understand the origin of one-body dissipation in nuclei, we analyze the behavior of a gas of classical particles moving in a two-dimensional cavity with nuclear dimensi…
The influence of dynamical friction on the collapse of spherical density pertubation
A. Del Popolo, M. Gambera, V. Antonuccio-Delogu
We solve numerically the equations of motion for the collapse of a shell of baryonic matter falling into the central regions of a cluster of galaxies, taking into account of the pr…