Understanding stochastic dynamics in classical and quantum condensed matter systems: Multistability and metastability.

Spagnolo B.

Comunicazione
II - Fisica della materia
GSSI Ex ISEF - Aula C - Mercoledì 25 h 10:00 - 13:00
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It is widely believed that environmental fluctuations enhance the escape from metastable states of classical and quantum systems. Here we show that environmental noise can enhance the stability of classical and quantum metastable systems strongly interacting with a thermal bath. Specifically, we analyze the escape stochastic dynamics and the nonlinear relaxation of three mesoscopic and quantum systems: i) a short Josephson junction (JJ) with graphene and a long JJ driven by Lévy noise; ii) the electron spin relaxation process in n-type GaAs crystals driven by a fluctuating electric field; and iii) a metastable quantum dissipative system driven by an external periodical driving.

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