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 2012-13/
Seminari A.A. 2012-2013
 
 
I Seminari si svolgono il martedì alle 14:30 nell'aula 311 del Dipartimento di Matematica (salvo diversa indicazione)
  
 
Relatore
Titolo
Data
  
 
 
Omar Maj
Max-Planck Inst. für
Plasmaphys. Garching
Semiclassical asymptotics of wave equations in inhomogeneous plasmas
02 Luglio 2013
(ore 14:00)
  
 
 
Marco Brambilla
Max-Planck Inst. für
Plasmaphys. Garching
On the constitutive relation of non-uniform plasmas
11 Giugno 2013
  
 
 
Mustapha Mourragui
Université de Rouen
Boundary driven Kawasaki process with Neuman Kac interaction
(II parte)
16 Maggio 2013
(giovedì)
  
 
 
Mustapha Mourragui
Université de Rouen
Boundary driven Kawasaki process with Neuman Kac interaction
(I parte)
15 Maggio 2013
(mercoledì)
  
 
 
Bruno Coppi
MIT
Views of the universe beyond reductionism, complexity
and role and diversity of plasmas
14 Maggio 2013
(ore 15:00)
  
 
 
Francesco Califano
Università di Pisa
The Vlasov equation
14 Maggio 2013
(ore 14:00)
  
 
 
Alain Messager
CPT - CNRS
Marseille
Phase transitions in the long range XXZ model
07 Maggio 2013
(ore 15:30)
  
 
 
Carlo Marchioro
Università di Roma
"La Sapienza"
Equazione di Vlasov-Poisson per un plasma
confinato tramite uno specchio magnetico
07 Maggio 2013
  
 
 
Milos Zahradnik
Charles University
Prague
Remarks on combinatorics of massless gaussians
30 Aprile 2013
(ore 15:00)
  
 
 
Daniela Grasso
CNR e
Politecnico di Torino
Magnetic reconnection
30 Aprile 2013
(ore 14:00)
  
 
 
Yuri Kondratev
Universität Bielefeld
Discrete random measures
23 Aprile 2013
  
 
 
Israel Michael Sigal
Toronto University
Singularity formation under the mean-curvature flow
12 Aprile 2013
(venerdì)
  
 
 
Errico Presutti
Università di Roma
"Tor Vergata"
Problemi di frontiera libera e limiti macroscopici in sistemi di particelle
09 Aprile 2013
  
 
 
Giovanni Gallavotti
INFN Roma1 e
Accademia dei Lincei
Pendolo forzato in stato stazionario
mantenuto fuori equilibrio da un rumore bianco
05 Marzo 2013
  
 
 
Alessandro Pizzo
UC Davis
Coulomb scattering in the massless Nelson model.
Foundations of two-electron scattering and regularity of ground-states
23 Ottobre 2012
(ore 16:00)
  
 
 
Zhituo Wang
Paris XI - Orsay
The constructive renormalization
of the 2 dimensional Grosse-Wulkenhaar model
26 Settembre 2012
(mercoledì)
  
 
 
Joel Lebowitz
Rutgers University
Three easy (to state) open problems (that have worried me for many years)
24 Settembre 2012
(lunedì 16:00 aula F)
  
 
 
Manuel de Llano
UNAM
Generalized Bose-Einstein condensation formalism and BCS theory
of superconductors and of ultracold Fermionic clouds
21 Settembre 2012
(venerdì)
  
 
Abstract
ritorna
A recent reexamination of BCS theory leads one to devise a generalized BEC formalism (GBEC) that is essentially a boson-fermion (BF) gas model containing three new ingredients: i) Cooper pairs (CPs), in contrast to BCS pairs, as real bosons; ii) BF vertex interactions (analogous to electron-phonon vertex interactions in metals) and iii) two-hole CPs (2hCPs) along with two-electron CPs (2eCPs) on an equal footing. In addition to the usual normal phase at very high temperatures T, three condensed phases emerge at low T: two pure BECs of 2eCPs and of 2hCPs, as well as a mixed phase of both kinds of CPs. BCS theory is precisely recovered with a mixed phase of equal numbers of both kinds of CPs. Substantially higher Tcs than BCS theory are predicted and, in contrast to the well-known BCS exponential rise of Tc from zero, the GBEC scheme exhibits a linear rise as function of doping as eminently observed in high-Tc superconductors. Ultracold fermionic atoms are briefly discussed, especially around the so-called unitarity range where the two-fermion scattering length can diverge.