Zobrazeno 1 - 10
of 496
pro vyhledávání: '"Politi Antonio"'
Ensembles of phase-oscillators are known to exhibit a variety of collective regimes. Here, we show that a simple mean-field model involving two heterogenous populations of pulse-coupled oscillators, exhibits, in the strong-coupling limit, a robust ir
Externí odkaz:
http://arxiv.org/abs/2407.08453
Autor:
Iubini, Stefano, Politi, Antonio
The observation of negative-temperature states in the localized phase of the the Discrete Nonlinear Schr\"odinger (DNLS) equation has challenged statistical mechanics for a long time. For isolated systems, they can emerge as stationary extended state
Externí odkaz:
http://arxiv.org/abs/2406.15140
Autor:
Politi, Antonio, Torcini, Alessandro
Dynamical balance of excitation and inhibition is usually invoked to explain the irregular low firing activity observed in the cortex. We propose a robust nonlinear balancing mechanism for a random network of spiking neurons, which works also in abse
Externí odkaz:
http://arxiv.org/abs/2401.12559
Autor:
Giacomelli, Giovanni, Politi, Antonio
The dynamics of a resonant, free-running ring laser, in the common case of a fast relaxation of the atomic polarization, is unexpectedly highly singular. As shown in [Phys. Rev. Research, {\bf 5}, 023059 (2023)], this is due to the closeness to a pur
Externí odkaz:
http://arxiv.org/abs/2311.14504
Publikováno v:
New J. Phys. 25 063020 (2023)
We study nonequilibrium steady states of a one-dimensional stochastic model, originally introduced as an approximation of the Discrete Nonlinear Schr\"odinger equation. This model is characterized by two conserved quantities, namely mass and energy;
Externí odkaz:
http://arxiv.org/abs/2303.14140
The Arecchi-Bonifacio (or Maxwell-Bloch) model is the benchmark for the description of active optical media. However, in the presence of a fast relaxation of the atomic polarization, its implementation is a challenging task even in the simple ring-la
Externí odkaz:
http://arxiv.org/abs/2303.01061
Autor:
Franzosi Roberto, Giampaolo Salvatore, Illuminati Fabrizio, Livi Roberto, Oppo Gian-Luca, Politi Antonio
Publikováno v:
Open Physics, Vol 9, Iss 5, Pp 1248-1254 (2011)
Externí odkaz:
https://doaj.org/article/95a214e72ded4f30ba4ecf5887997c8c
Publikováno v:
BMC Neuroscience, Vol 12, Iss Suppl 1, p P336 (2011)
Externí odkaz:
https://doaj.org/article/b4c9b364da0f4413ae762abd5011c04b
Publikováno v:
J. Stat. Mech.: Theory and Experiments, 043206 (2022)
The Discrete Nonlinear Schr\"odinger (DNLS) equation is a Hamiltonian model displaying an extremely slow relaxation process when discrete breathers appear in the system. In [Iubini S, Chirondojan L, Oppo G L, Politi A and Politi P 2019 Physical Revie
Externí odkaz:
http://arxiv.org/abs/2201.02529
The acclaimed Maxwell-Bloch (or Arecchi-Bonifacio) equations are a valid dynamical model, effectively describing wave propagation in nonlinear optical media: from the amplification in input-output devices to multimode instabilities arising in laser s
Externí odkaz:
http://arxiv.org/abs/2111.05367