Buscar
Mostrando ítems 1-9 de 9
Artículo
Universal asymptotic behavior in nonlinear systems driven by a two-frequency forcing
(American Physical Society, 2013)
We examine the time-dependent behavior of a nonlinear system driven by a two-frequency forcing. By using a nonperturbative approach, we are able to derive an asymptotic expression, valid in the long-time limit, for the ...
Artículo
Thermal equilibrium in Einstein’s elevator
(American Physical Society, 2013)
We report fully relativistic molecular-dynamics simulations that verify the appearance of thermal equilibrium of a classical gas inside a uniformly accelerated container. The numerical experiments confirm that the local ...
Artículo
Vibrational mechanics in an optical lattice: controlling transport via potential renormalization
(American Physical Society, 2012)
We demonstrate theoretically and experimentally the phenomenon of vibrational resonance in a periodic potential, using cold atoms in an optical lattice as a model system. A high-frequency (HF) drive, with a frequency ...
Artículo
Current reversals in a rocking ratchet: dynamical versus symmetry-breaking mechanisms
(American Physical Society, 2010)
Directed transport in ratchets is determined by symmetry breaking in a system out of equilibrium. A hallmark of rocking ratchets is current reversals: an increase in the rocking force changes the direction of the current. ...
Artículo
Control of transport in two-dimensional systems via dynamical decoupling of degrees of freedom with quasiperiodic driving fields
(American Physical Society, 2012)
We consider the problem of the control of transport in higher-dimensional periodic structures by applied ac fields. In a generic crystal, transverse degrees of freedom are coupled, and this makes the control of motion ...
Artículo
Stationarity, ergodicity, and entropy in relativistic systems
(European Physical Society, 2009)
Recent molecular-dynamics simulations show that a dilute relativistic gas equilibrates to a Jüttner velocity distribution if ensemble velocities are measured simultaneously in the observer frame. The analysis of relativistic ...
Artículo
Current reversals in a rocking ratchet: the frequency domain
(American Physical Society, 2011)
Motivated by recent work [D. Cubero et al., Phys. Rev. E 82, 041116 (2010)], we examine the mechanisms which determine current reversals in rocking ratchets as observed when varying the frequency of the drive. We found ...
Artículo
Irrationality and quasiperiodicity in driven nonlinear systems
(American Physical Society, 2014)
We analyze the relationship between irrationality and quasiperiodicity in nonlinear driven systems. To that purpose, we consider a nonlinear system whose steady-state response is very sensitive to the periodic or quasiperiodic ...
Artículo
Observation of stochastic resonance in directed propagation of cold atoms
(American Physical Society, 2022-12)
Randomly diffusing atoms confined in a dissipative optical lattice are illuminated by a weak probe of light. The probe transmission spectrum reveals directed atomic propagation that occurs perpendicular to the direction ...