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- Francesco Ginelli, Philippe Poggi, Alessio Turchi, Hugues ChatÃ©, Roberto Livi, Antonio Politi
- Physical review letters
- 2007

A general method to determine covariant Lyapunov vectors in both discrete- and continuous-time dynamical systems is introduced. This allows us to address fundamental questions such as the degree ofâ€¦ (More)

Deriving macroscopic phenomenological laws of irreversible thermodynamics from simple microscopic models is one of the tasks of non-equilibrium statistical mechanics. We consider stationary energyâ€¦ (More)

The formation of amplitude modulated and phase modulated assemblies of neurons is observed in the brain functional activity. The study of the formation of such structures requires that the analysisâ€¦ (More)

- RÃ¼diger Zillmer, Roberto Livi, Antonio Politi, Alessandro Torcini
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2006

The dynamical behavior of a weakly diluted fully inhibitory network of pulse-coupled spiking neurons is investigated. Upon increasing the coupling strength, a transition from regular toâ€¦ (More)

- RÃ¼diger Zillmer, Roberto Livi, Antonio Politi, Alessandro Torcini
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2007

The stability of the dynamical states characterized by a uniform firing rate (splay states) is analyzed in a network of globally coupled leaky integrate-and-fire neurons. This is done by reducing theâ€¦ (More)

The problem of the existence of a Strong Stochasticity Threshold in the FPU-Î² model is reconsidered, using suitable microcanonical observables of thermodynamic nature, like the temperature and theâ€¦ (More)

- Elisa Calistri, Roberto Livi, Marcello Buiatti
- Molecular phylogenetics and evolution
- 2011

Nucleotide distributions in genomes is known not to be random, showing the presence of specific motifs, long and short range correlations, periodicities, etc. Particularly, motifs are critical forâ€¦ (More)

- Francesco Piazza, Stefano Lepri, Roberto Livi
- Chaos
- 2003

We describe the energy relaxation process produced by surface damping on lattices of classical anharmonic oscillators. Spontaneous emergence of localized vibrations dramatically slows downâ€¦ (More)

- Simona Olmi, Roberto Livi, Antonio Politi, Alessandro Torcini
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2010

We investigate the onset of collective oscillations in a excitatory pulse-coupled network of leaky integrate-and-fire neurons in the presence of quenched and annealed disorder. We find that theâ€¦ (More)

After reviewing the main features of anomalous energy transport in 1D systems, we report simulations performed with chains of noisy anharmonic oscillators. The stochastic terms are added in such aâ€¦ (More)