**_E. Alesci**

Title:"The full graviton propagator from loop quantum gravity"

Author: E. Alesci

Abstract: Some components of the graviton two-point function have been recently computed in the context of loop quantum gravity, using the spinfoam Barrett-Crane vertex. We complete the calculation of the remaining components. We find that, under our assumptions, the Barrett-Crane vertex does not yield the correct long distance limit. Here we show that a vertex amplitude that depends nontrivially on the intertwiners can yield the correct limit. We give an explicit example of asymptotic behavior of a vertex amplitude that in fact gives the full correct graviton propagator in the large distance limit.

**_G. Amelino-Camelia**

Title: "Quantum Gravity Phenomenology and a generalization of the Noether theorem for quantum spacetime"

Author: G. Amellino-Camelia

Abstract: In devising a phenomenology for quantum-gravity theories additional difficulties are introduced by grey areas in our identification of observable consequences of a given theory. This has been particularly true for the study of Planck-scale modifications of spacetime symmetries, but for this I intend to argue that a recently-obtained generalization of the Noether theorem should provide a very valuable new tool.

**
_M. V. Battisti
**

Authors:
M. V. Battisti, G. Montani

Abstract:

Authors:
M. V. Battisti, G. Montani

Abstract:

**
_R. Benini
**

Title: "Mixmaster dynamics in the Wheeler-DeWitt framework"

Authors:
R. Benini, G. Montani

Abstract:

**
_D. Bini
**

Title: Synchronization surfaces in black hole spacetimes

Authors:
D. Bini.

Abstract:

_:**N. Carlevaro**

Title: Lorentz Gauge Theory and spinor
interaction

Authors: O.M. Lecian, G. Montani, N. Carlevaro

Abstract: A gauge theory of the Lorentz group, based on the different behavior
of spinors and vectors under local space time transformations, is formulated. In
this gauge scheme suitable bein projections of the contortion field are
identified with Lorentz connections. As a result, a propagating torsion field
with the spin-current density as a source is predicted from Yang-Mills
equations.

Title: On the role of viscosity in Early Cosmology

Authors:
N. Carlevaro and G. Montani

Abstract: We present an analysis of the effects induced by
dissipative processes on the
evolution of the very early
Universe. In particular we focus on the dynamical behavior

of a quasi-isotropic Universe in the presence of a cosmological fluid endowed
with bulk viscosity. The viscosity coefficient is expressed as a power-law of
the fluid energy density. Following the line of the work by E.M. Lifshitz and
I.M. Khalatnikov, the Einstein and the hydrodynamical equations are integrated
up to first and second order in time. As main result is shown that the
quasi-isotropic solution exists only for particular values of the bulk viscosity
coefficient. By requiring that the viscosity parameter be under its critical
value the evolution, toward the singularity, is damped until remaining constant.

**_F. Cianfrani**

Title:
E.C.G. Stueckelberg, a forerunner of modern physics II

Authors: F. Cianfrani, O. M. Lecian

Abstract:

Title: The role of the time gauge in the 2nd order formalism

Authors: F. Cianfrani, G. Montani

Abstract: We perform a canonical quantization of gravity in a second-order formulation, taking as configuration variables those describing a 4-bein, not adapted to the space-time splitting. We outline how, neither if we fix the Lorentz frame before quantizing, nor if we perform no gauge fixing at all, is invariance under boost transformations affected by the quantization.

Title: Curvature-spin coupling from the semi-classical limit of the Dirac equation

Authors: F. Cianfrani, G. Montani

Abstract: The notion of a classical particle is inferred from Dirac quantum fields on a curved space-time, by an eikonal approximation and a localization hypothesis for amplitudes. This procedure allows to define a semi-classical version of the spin-tensor from internal quantum degrees of freedom, which has a Papapetrou-like coupling with the curvature. Nevertheless additional contributions to the dynamics are present, such that it differs from a that of a classical spinning body.

Title: Elementary particle interaction from a Kaluza-Klein scheme

Authors: F. Cianfrani, G. Montani

Abstract: We discuss properties of particles and fields in a multi-dimensional space-time, where the geometrization of gauge interactions can be performed For what concern spinors, we outline how the gauge coupling can be recognized by a proper dependence on extra-coordinates and by the dimensional reduction procedure. Finally applications to the Electro-Weak model are presented.

**
_A. Geralico
**

Title: Perturbations of a Reissner-Nordstr\"om black hole by a
charged massive particle at rest

Authors: D. Bini, A. Geralico, R. Ruffini

Abstract:

**
_V. Lacquaniti**

Title: Matter coupling in Kaluza Klein 5D model

Authors: V. Lacquaniti, G. Montani

Abstract: A longstanding problem in KK model is the coupling with matter. By dimensional reduction of the geodesic motion for a 5D free test particle we are able to formally restores electrodynamics, but the reduced 4D particle shows a charge over mass ratio bounded by below in such a way that it cannot fit with any kind of elementary particle. We present a criticism against 5D geodesic approach and face the hyphotesis that in KK space the geodesic motion does not deal with the dynamics of our test particle. We present a new approach, based on Papapetrou multipole expansion of the 5D matter tensor. Within this framework we deal rigorously with definitions of charge and mass and we prove that 5D dynamical equation differs from 5D geodesic equation. We find a new equation for motion that shows right coupling terms and matches with phenomenology, no boundig arising for charge and mass. Applications and perspectives of these new equations are discussed.

**
_O. M. Lecian
**

Title: E.C.G. Stueckelberg, a forerunner of modern physics II

Authors: F. Cianfrani, O. M. Lecian

Abstract:

Title: Exponential Lagrangian for the gravitational field and
the problem of vacuum energy

Authors: O. M. Lecian, G. Montani

Abstract:

Title: Extended fundamental space-time symmetries

Authors: O. M. Lecian, G. Montani

Abstract:

**
_E. Magliaro**

Title: "Comparing Loop Quantum Gravity with the linearized theory"

Authors: E. Magliaro, C. Perini

Abstract:
In the first part of the talk E.M. will illustrate the conceptual
scenario of the general boundary formulation for field theories and will present
a brief description of the calculus of graviton propagator performed by E.
Bianchi, L. Modesto, C. Rovelli e S. Speziale in the context of LQG.

In the second part C.P. will analyze the possibility of comparing this result
with the graviton propagator in perturbative quantum gravity. For this purpose
he will present the result of a recent work that demonstrates the compatibility
of harmonic and radial gauge; it allows to simultaneously impose both gauges and
to obtain an expression for the propagator comparable with the one provided by
LQG.

**
_I. Milillo
**

Title: On the coupling between spinning particles and
cosmological gravitational waves

Authors: Giovanni Montani, Irene Milillo, Massimiliano
Lattanzi

Abstract

_**G. Montani **

Title: Sincrhonous Quantum Gravity: Early Universe dynamic

Author: G. Montani.

Abstract: A brief review concerning the problem of time in
Quantum Gravity is provided in order to outline possible links with the
canonical framework of quantization.

The implications of restricting the covariance principle within a Gaussian gauge
are developed both on a classical and a quantum level. Hence, we investigate the
cosmological issues of the obtained Schrodinger Quantum Gravity with respect to
the asymptotically early dynamics of a generic Universe. A dualism between time
and the reference frame fixing is then inferred.

**
_C. Perini**

Title: Comparing Loop Quantum Gravity with the linearized theory

Authors: E. Magliaro, C. Perini

Abstract:
In the first part of the talk E.M. will illustrate the conceptual
scenario of the general boundary formulation for field theories and will present
a brief description of the calculus of graviton propagator performed by E.
Bianchi, L. Modesto, C. Rovelli e S. Speziale in the context of LQG.

In the second part C.P. will analyze the possibility of comparing this result
with the graviton propagator in perturbative quantum gravity. For this purpose
he will present the result of a recent work that demonstrates the compatibility
of harmonic and radial gauge; it allows to simultaneously impose both gauges and
to obtain an expression for the propagator comparable with the one provided by
LQG.

**
_M. Pizzi
**

Title: Electric force lines of the double Reissner-Nordstrom
solution

Authors:
A. Paolino, M. Pizzi.

Abstract:

**
_M. Rotondo
**

Title: On the nuclear matter in bulk: from nuclei to neutron
cores

Authors: M. Rotondo, B.Patricelli, R.Ruffini, S.S. Xue

Abstract:

**_C.
Sigismondi**

Title: Meteotsunami detection in Adriatic and Tyrrenian sea

Author: Costantino Sigismondi

Abstract: Local atmospheric pressure variations of 1 hPa produce sea level changes of 1 cm which start to propagate like shallow water waves. Meteotsunami are such long waves originated by atmosferic perturbations. Such waves in semi-enclosed seas or lakes become oscillating seiches with frequency dependent on basin's geometry. Summer seiches activity in central Adriatic and Tyrrenian sea is larger than tidal variation of sea surface on timescales shorter than one hour. We adapetd ultrasonic detectors with acquisition rate of 100 data per minute to monitor the elevation of sea surface. Our datasets lasting up to three hours recorded in July-September 2007 are analyzed in order to understand the dynamics of those long waves.

**
_G. Vereshchagin
**

Title: Semi-classical Loop Quantum
Cosmology

Author:
G.V. Vereshchagin

Abstract:

Title: Thermalization of the pair plasma

Authors: A.G. Aksenov, R. Ruffini, G.V. Vereshchagin

Abstract: Starting from a nonequilibrium configuration we analyse the essential role of the direct and the inverse binary and triple interactions in

reaching an asymptotic thermal equilibrium in homogeneous isotropic electron-positron-photon plasma. We focus on the energies in the range 0.1-10 MeV. We integrate numerically integro-partial differential relativistic Boltzmanns equation with the exact QED collisional integrals taking into account all binary and triple interactions in the plasma. We show that first, when detailed balance is reached for all binary interactions on a timescale t_{k}<~10^{-14}sec, photons electron-positron pairs establish kinetic equilibrium. Successively, when triple interactions fulfill the detailed balance on a timescale t_{eq}<~10^{-12}sec, the plasma reaches thermal equilibrium. It is shown that neglecting the inverse triple interactions prevents reaching thermal equilibrium. Our results obtained in the theoretical physics domain find also applications in astrophysics and cosmology.

**
_S. S. Xue**

Title: electron-positron productions in inhomogeneous electric fields.

Authors: R. Ruffini, S. S. Xue

Abstract: we calculate the semi-classical WKB-rate of electron-positron productions in inhomogeneous electric fields, provided energy-level crossings occur between the negative and positive energy-spectra.

**
_R. Zalaletdinov
**

Title: Macroscopic Gravity and Averaging Problem in Cosmology

author:
R. Zalaletdinov

Abstract:

**_F. Zonca**

Title: The Physics of Burning Plasmas in Toroidal Magnetic Field Devices

Author: F. Zonca

Abstract: Some of the crucial physics aspects of burning plasmas
magnetically confined in toroidal systems are presented from the viewpoint of
nonlinear dynamics.

Most of the discussions specifically refer to tokamaks, but they can be readily
extended to other toroidal confinement devices. Particular emphasis is devoted
to fluctuation induced transport processes of mega electron volts energetic ions
and charged fusion products as well as to energy and particle transports of the
thermal plasma. Long time scale behaviours due to the interplay of fast ion
induced collective effects and plasma turbulence are addressed in the framework
of burning plasmas as complex self-organized systems. The crucial roles of
mutual positive feedbacks between theory, numerical simulation and experiment
are shown to be the necessary premise for reliable extrapolations from present
day laboratory to burning plasmas. Examples of the broader applications of
fundamental problems to other fields of plasma physics and beyond are also
given.

**_S. Zonetti**

Title: The parametrizing fluids in canonical Quantum Gravity

Authors: S. Zonetti, G. Montani

Abstract: we present the parametrizing fluids as possible solution for the problem of time in canonical quantum gravity: we review and apply the Kuchar-Brown mechanism on two general classes of fluids, searching for a physical hamiltonian that generates the time evolution.