3 papers
chao-dyn1999
Finite times to equipartition in the thermodynamic limit
J. De Luca, A. Lichtenberg, S. Ruffo
We study the time scale T to equipartition in a 1D lattice of N masses coupled by quartic nonlinear (hard) springs (the Fermi-Pasta-Ulam beta model). We take the initial energy to…
chao-dyn1997
Nonuniversality of weak synchronization in chaotic systems
M. de Sousa Vieira, A. J. Lichtenberg
We show that the separate properties of weak synchronization (WS) and strong synchronization (SS), reported recently by Pyragas [K. Pyragas, Phys. Rev. E, 54, R4508 (1996)], in uni…
cond-mat1996
Nonlinear feedback for control of chaos
M. de Sousa Vieira, A. J. Lichtenberg
We generalize a method of control of chaos which uses delayed feedback at the period of an unstable orbit to stabilize that orbit. The generalization consists of substituting some…