The nonequilibrium short-time critical behaviors of driven and undriven lattice gases are investigated via Monte Carlo simulations in two spatial dimensions starting from a fully disordered initial configuration. In particular, we study the time evolution of suitably defined order parameters, which account for the strong anisotropy introduced by the homogeneous drive. We demonstrate that, at short times, the dynamics of all these models is unexpectedly described by an effective continuum theory in which transverse fluctuations, i.e., fluctuations averaged along the drive, are Gaussian, irrespective of this being actually the case in the stationary state. Strong numerical evidence is provided, in remarkable agreement with that theory, both for the driven and undriven lattice gases, which therefore turn out to display the same short-time dynamics.
Short-Time Behavior and Criticality of Driven Lattice Gases / U. Basu, V. Volpati, S. Caracciolo, A. Gambassi. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 118:5(2017), pp. 050602.1-050602.5. [10.1103/PhysRevLett.118.050602]
Short-Time Behavior and Criticality of Driven Lattice Gases
S. CaraccioloPenultimo
;
2017
Abstract
The nonequilibrium short-time critical behaviors of driven and undriven lattice gases are investigated via Monte Carlo simulations in two spatial dimensions starting from a fully disordered initial configuration. In particular, we study the time evolution of suitably defined order parameters, which account for the strong anisotropy introduced by the homogeneous drive. We demonstrate that, at short times, the dynamics of all these models is unexpectedly described by an effective continuum theory in which transverse fluctuations, i.e., fluctuations averaged along the drive, are Gaussian, irrespective of this being actually the case in the stationary state. Strong numerical evidence is provided, in remarkable agreement with that theory, both for the driven and undriven lattice gases, which therefore turn out to display the same short-time dynamics.File | Dimensione | Formato | |
---|---|---|---|
p164.pdf
accesso aperto
Tipologia:
Publisher's version/PDF
Dimensione
564.25 kB
Formato
Adobe PDF
|
564.25 kB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.