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

2005 09 05 - MONDAY

 9.15 -  9.30 OPENING

CHAIR: Peter Young

 9.30 - 10.10 P. Contucci - The Ghirlanda-Guerra Identities

10.15 - 10.55 H. Nishimori - Existence proof of duality relations in
                             spin glass models

11.00 - 11.30 COFFEE BREAK

11.30 - 12.10 G. Gallavotti - Divergent series sum rules and
                              resonances in classical mechanics
 
12.15 - 12.55 Y. Ozeki - Gauge theory for gauge glass systems

13.00 - 15.00 LUNCH

CHAIR: Nicolas Sourlas

15.00 - 16.00 SHORT TALKS: Mongillo, Takeda, Lukic. 

16.00 - 16.30 COFFEE BREAK

16.30 - 16.55 D. Sherrington - Zero Temperature Replica Symmetry Breaking 
                               in the Sherrington-Kirkpatrick and Fermionic 
                               Ising Spin Glasses; Renormalization Group 
                               in RSB Space
 
17.00 - 17.40 F. Guerra - Fluctuations and overlap locking in mean 
                          field spin glass theory

 
17.45 - 18.25 H. Kitatani - The energy distribution function of
                            finite-dimensional Ising  spin glass

18.30 - 19.30 POSTER SESSION

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

2005 09 06 - TUESDAY

CHAIR: Federico Ricci-Tersenghi

 9.30 - 10.10 J.-P. Bouchaud - Financial markets: the
                               Bachelier-Einstein's legacy

10.15 - 10.55 Y. Kabashima - Application of survey propagation
                             to CDMA multiuser detection

11.00 - 11.30 COFFEE BREAK

CHAIR: Miguel Virasoro

11.30 - 12.10 K. Tanaka - Graphical model and generalized belief
                          propagation in probabilistic image processing

12.15 - 12.40 G. Careri - Proton glass of hydrogenated protein powder 
 
12.45 - 13.10 I. Kanter - Asymptotics of the entropy rate for a 
                          hidden Markov process 

13.15 - 15.00 LUNCH

CHAIR: Irene Giardina

15.00 - 16.00 SHORT TALKS: Sasamoto, de Martino, Semerjan.

16.00 - 16.30 COFFEE BREAK

16.30 - 17.10 M. Mezard - Clustering of solutions in constraint
                          satisfaction problems
 
17.15 - 17.55 A. Montanari - How to prove convergence for belief propagation
                             and related algorithms: a survey
 
18.00 - 18.40 J. Inoue - Quantum phase transition and decoding
                         performance in Sourlas codes

18.45 - 19.45 POSTER SESSION

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

2005 09 08 - THURSDAY

CHAIR: Andrea Cavagna

 9.30 - 10.10 M. Weigt - Complex regulatory control in Boolean networks
 
10.15 - 10.55 H. Yoshino - Fluctuations in spin glasses and
                           some simple domain growth systems

11.00 - 11.30 COFFEE BREAK

CHAIR: Scott Kirkpatrick

11.30 - 12.10 G. Biroli - Jamming transitions: glasses, granular media
                          and simple lattice models
 
12.15 - 12.55 H. Takayama - Glassy Dynamics of Ising Spin Glasses 
                            in a Magnetic Field --- Numerical and Real 
                            Experiments --

13.00 - 15.00 LUNCH

CHAIR: Enzo Marinari

15.00 - 15.40 SHORT TALKS: Zamponi, Maiorano

15.40 - 16.05 G. Parisi - On the complexity in spin glasses 
  
16.10 - 16.40 COFFEE BREAK 

16.40 - 17.00 SHORT TALKS: Leuzzi

17.00 - 17.40 M. Moore - Validity of perturbation theory for
                         finite-dimensional spin glasses
  
17.45 - 18.10 S. Franz - Metastable states, relaxation times 
                         and free-energy barriers in finite
                         dimensional glassy systems

18.15 - 18.30 CLOSING

SHORT TALKS ARE 17' + 3' for questions each.

*******************************************************************
*******************************************************************
 
ABSTRACTS
 
P. Contucci - The Ghirlanda-Guerra Identities

  We will show a proof of the Ghirlanda-Guerra identities
  which only requires that the variance of the Hamiltonian
  grows like the volume (thermodynamic stability). Our
  result is expressed in terms of the model's covariance and
  applies to all known spin glass models.
 
S. Franz - Metastable States, Relaxation Times and Free-energy 
           Barriers in Finite Dimensional Glassy Systems

  A prominent theoretical problem in the physics of glassy systems is
  the comprehension of the nature of the relaxation processes that
  restore ergodicity in regions where approximated liquid theories or
  Mean-Field models predict a spurious structural arrest. These
  processes have a non-perturbative nature and a satisfactory theory
  is not available at present. In this talk I will deal with spin
  glass models with long-but-finite Kac interactions which offers the
  opportunity of attacking the problem in asymptotic expansions around
  mean field.  I will first show how to define metastable states, then
  argue that they dominate the low temperature dynamics and finally
  relate the equilibrium relaxation time to free-energy barriers
  computable in principle in a purely static setting. Being the
  essence of the argument based on time scale separation, I will
  discuss its relevance for glassy materials.

F. Guerra - Fluctuations and overlap locking in mean 
            field spin glass theory
 
  In the frame of the interpolation methods developed in recent years,
  we consider the phenomenon of overlap locking by the action of a
  suitably chosen auxiliary system on the original mean field spin
  glass system.  Overlap locking is ruled by a fluctuation parameter,
  in the infinite volume limit. As a simple application, we show how
  the replica symmetric solution is valid up to the expected
  Almeida-Thouless line. Moreover, we show how the Derrida - Ruelle -
  Parisi probability cascades, originating from the generalized random
  energy model, are able to provide overlap locking on the
  Sherrington-Kirkpatrick spin glass.

I. Kanter - Asymptotics of the Entropy Rate for a Hidden Markov Process

  We calculate the Shannon entropy rate of a binary Hidden Markov
  Process (HMP), of given transition rate and noise epsilon
  (emission), as a series expansion in epsilon. We map the problem
  onto a one-dimensional Ising model in a large field of random signs
  and calculate the expansion coefficients up to second order in
  epsilon.  For finite histories, Cover's upper bounds is also
  calculated.  Surprisingly, we find that for a fixed order k and
  history of n steps, the bounds become independent of n for large
  enough n. This observation is the basis of a conjecture, that the
  upper bound obtained for n >= (k+3)/2 gives the exact entropy rate
  for any desired order k of epsilon.

A. Montanari - How to prove convergence for belief propagation 
               and related algorithms: a survey.
 
  There exist a few techniques for proving convergence of belief
  propagation algorithms. I will review them and explain a few
  applications to statistical physics and beyond. I will then stress
  the importance of developing more general tools.
 
 
D. Sherrington - Zero Temperature Replica Symmetry Breaking 
                 in the Sherrington-Kirkpatrick and Fermionic Ising 
                 Spin Glasses; Renormalization Group in RSB Space
   
  By means of accurate numerical self-consistent solutions of replica
  symmetry breaking (RSB) up to fifth order for the SK-model, coupled
  with analogies to Wilson's renormalization group but with the number
  of replica symmetry breaking steps playing a role analogous to that
  of decimation scales, we report evidence for a non-trivial
  zero-temperature limit of the Parisi order function q(x). The
  zero-temperature limiting order function exhibits an error function
  form with a characteristic correlation length in replica space which
  is also the solution of an effective one-dimensional `field theory'.
  We also report investigations of the zero-temperature local magnetic
  field distribution which again show RG behaviour in RSB space, as
  well as the now-expected pseudogap but also evidence for two
  different limiting slopes for in the low field limit.  The fermionic
  Ising spin glass shows similar behaviour, with the local field
  distribution reflected in the single-particle spectral function.


H. Takayama - Glassy Dynamics of Ising Spin Glasses 
              in a Magnetic Field --- Numerical and Real 
              Experiments --

  Numerical experiments (standard MC simulations) on two aging
  protocols of the 3D Ising EA spin-glass (SG) in a static magnetic
  field $h$ are carried out and are compared with the corresponding
  experiments on real SG materials. One is the field-shift aging
  protocol at temperature $T$ with waiting time $\tw$ before $h$ is
  switched on [1]. Extracting the dynamical crossover time, $\tcr(T;
  \tw, h)$ and introducing properly the two characteristic length
  scales associated with $\tcr$ and $\tw$, we have found an
  interesting scaling between the latter two which are normalized by
  the static field crossover length introduced in the SG droplet
  theory. The result implies the instability of the SG phase in the
  equilibrium limit even under an infinitesimal $h$. Also, the
  extracted dynamical crossover, when it is extrapolated to the time
  rage of real experiments, coincides even semi-quantitatively with
  the occurrence of irreversibility of the zero-field-cooled
  magnetization (ZFCM) and the field-cooled magnetization (FCM).  We
  have also studied the FCM process under relatively small $h$ in
  detail and have compared with the corresponding experimental results
  [2].  Both numerical and real experimental results are explained by
  means of the droplet picture in a unified way. Particularly, the
  cusp-like behavior of the FCM (not only ZFCM) is interpreted as
  evidence for a `thermal blocking' transition frequently observed in
  glassy systems.

[1] H. Takayama and K. Hukushima: J. Phys. Soc. Jpn. 73 (2004) 2077.
[2] P.E. J\"onsson and H. Takayama: J. Phys. Soc. Jpn. 74 (2005) 1131.