Stochastic-time description of transitions in unstable and multistable systems
Anno: 1982
Autori: Arecchi F.T., Politi A., Ulivi L.
Affiliazione autori: Istituto di Fisica dell’Università, Firenze;
Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italia
Abstract: The decay of a macroscopic unstable state implies anomalous fluctuations in the amplitudes of the decaying parameters, which are the transient extension of the stationary divergences at the critical point of phase transitions. These decays are best studied, theoretically and experimentally, via the stochastic times of intersection of a given threshold. Besides yielding a closed solvable set of moment equations, the stochastic time approach permits to discriminate the transient fluctuations due to the spread in the initial conditions from those arising from noise along the path. These latter ones limit the validity of the so-called asymptotic approximation. Here we develop a detailed theory including scaling laws and then compare it with experimental measurements in order to show the limit of previous approaches.
Giornale/Rivista: IL NUOVO CIMENTO B
Volume: 71 (1) Da Pagina: 119 A: 154
Parole chiavi: multistable systemsDOI: 10.1007/BF02721698Citazioni: 55dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui