Seminar @ DF-TS - Fri 2 Mar 2:30 pm - F. Carollo

[Rosita Glavina - Dip. Fisica UniTS]

We are pleased to announce the next seminar @ DF-Theory Section UniTs:
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F. Carollo
School of Physics and Astronomy, University of Nottingham, U.K.

"Current fluctuations in boundary-driven quantum spin-chains"

Friday, 2 March 2018 - 2:30 pm
Room 204, 2nd floor, Leonardo Building, Strada Costiera, 11

ABSTRACT:
Large dynamical fluctuations - atypical realisations of the dynamics 
sustained over long periods of time - can play a fundamental role in 
determining properties of the collective behaviour of both classical and 
quantum non-equilibrium systems. In this talk, we will first review how 
to characterise, by means of large deviations techniques, these atypical 
realisations in Markovian open quantum systems, and then we will make 
use of this formalism to describe fluctuations of the current in 
boundary-driven spin chains. While, in general, it is not possible to 
distinguish classical from quantum transport by monitoring mean 
currents, we will show that genuine quantum features become manifest in 
rare dynamical realisations. In the classical case, realisations with an 
atypically large number of events at the boundaries are as well 
sustaining a larger than typical current; conversely, in the quantum 
case, the Zeno effect leads to suppression of the current in 
fluctuations with large activity at the boundary.

The flyer can be downloaded at
https://df.units.it/sites/df.units.it/files/locandina%20seminario%20Carollo_Mar2018.pdf

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The calendar of events taking place at the Physics Department is 
available at
https://df.units.it/en/events/all_evnt/