Fwd: SP Seminar 26.01.2016 @SISSA: Federico Corberi

[Condensed Matter Section]

-------- Forwarded Message --------
Subject: 	SP Seminar 26.01.2016 @SISSA: Federico Corberi
Date: 	Thu, 21 Jan 2016 16:44:12 +0100
From: 	Vincenzo Alba <valba at sissa.it>
Reply-To: 	joint ICTP/SISSA Statistical Physics Group Seminars 
<statistical_physics_seminar at lists.ictp.it>
To: 	statistical_physics_seminar at lists.ictp.it



JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR

Tuesday, 26th January - 11:00 a.m.

SISSA Building, room 128, first floor


*****************************************************************

Speaker: Federico Corberi (University of Salerno)

Title:Condensation of large fluctuations in a statistical system.

Abstract:

Condensation is the phenomenon whereby a finite fraction of some
quantity, e.g. a particle density, concentrates into a small region of
phase-space, as in the paradigmatic example of a vapor transforming
into a liquid when crossing a phase-transition. Condensation is
observed in a number of different models, related to magnetic
properties, gravity, mass transport, bosonic properties etc... In this
case condensation is a property of the typical state of the system,
that is to
say it is observed by monitoring average properties.
A different manifestation of condensation is observed when probability
distributions of a fluctuating collective variable, such as the number
of particles in a thermodynamic system, are considered. In this case,
a fluctuation well above the typical value can be associated to a
condensed configuration of the system. This phenomenon, referred to as
condensation of fluctuations, was observed for quantities as diverse
as particle number, energy, exchanged heats, particles currents etc...
This phenomenon is distinct, in principle, from the usual
"condensation on average", despite a unified mathematical description
is possible in
many cases.
In this talk I will discuss the phenomenon of condensation of
fluctuations on general grounds by considering some examples taken
from paradigmatic models of Statistical Physics.

****************************************************************

Vincenzo


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