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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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75 papers · 1 filter
Instanton-Induced Correlations in Hadrons
Pietro Faccioli
QCD instantons generate non-perturbative spin- and flavor- dependent forces between quarks. We review the results of a series of studies on instanton-induced correlations in hadron…
Characterization of disturbance sources for LISA: torsion pendulum results
L. Carbone, A. Cavalleri, R. Dolesi +4
A torsion pendulum allows ground-based investigation of the purity of free-fall for the LISA test masses inside their capacitive position sensor. This paper presents recent improve…
A Bose-Einstein condensate in a random potential
J. E. Lye, L. Fallani, M. Modugno +3
An optical speckle potential is used to investigate the static and dynamic properties of a Bose-Einstein condensate in the presence of disorder. For strong disorder the condensate…
Density pattern in supercritical flow of liquid He-4
F. Ancilotto, F. Dalfovo, L. P. Pitaevskii +1
A density functional theory is used to investigate the instability arising in superfluid He as it flows at velocity u just above the Landau critical velocity of rotons v_c. Con…
Measuring the LISA test mass magnetic proprieties with a torsion pendulum
M. Hueller, M. Armano, L. Carbone +5
Achieving the low frequency LISA sensitivity requires that the test masses acting as the interferometer end mirrors are free-falling with an unprecedented small degree of deviation…
Microstructure dependence of low-temperature elastic properties in amorphous diamond-like carbon films
Xiao Liu, T. H. Metcalf, P. Mosaner +1
We have studied the internal friction and the relative change in the speed of sound of amorphous diamond-like carbon films prepared by pulsed-laser deposition from 0.3 K to room te…
Emergence of a filamentary structure in the fireball from GRB spectra
Remo Ruffini, Carlo Luciano Bianco, Pascal Chardonnet +3
It is shown that the concept of a fireball with a definite filamentary structure naturally emerges from the analysis of the spectra of Gamma-Ray Bursts (GRBs). These results, made…
On the Thermodynamics of Goedel Black Holes
Dietmar Klemm, Luciano Vanzo
After a brief review of Goedel-type universes in string theory, we discuss some intriguing properties of black holes immersed in such backgrounds. Among these are the upper bound o…
Dephasing and breakdown of adiabaticity in the splitting of Bose Einstein Condensates
L. Pezze, A. Smerzi, G. P. Berman +2
We study the quantum dynamics of a BEC condensate trapped in a double-well potential with a rising interwell barrier. We analytically find the characteristic time scales of the spl…
Recent Developments in the Lorentz Integral Transform (LIT) Method
G. Orlandini
Recent results on electromagnetic reactions into the continuum of systems with A from 3 to 7 are presented. They have been obtained using the Lorentz Integral Transform (LIT) metho…
Improved Torsion Pendulum for Ground Testing of LISA Displacement Sensors
L. Carbone, A. Cavalleri, R. Dolesi +4
We discuss a new torsion pendulum design for ground testing of prototype LISA (Laser Interferometer Space Antenna) displacement sensors. This new design is directly sensitive to ne…
Oscillations of a Bose-Einstein condensate rotating in a harmonic plus quartic trap
M. Cozzini, A. L. Fetter, B. Jackson +1
We study the normal modes of a two-dimensional rotating Bose-Einstein condensate confined in a quadratic plus quartic trap. Hydrodynamic theory and sum rules are used to derive ana…
Atom interferometric detection of the pairing order parameter in a Fermi gas
Iacopo Carusotto, Yvan Castin
We propose two interferometric schemes to experimentally detect the onset of pair condensation in a two spin-component Fermi gas. Two atomic wave-packets are coherently extracted f…
Quantum Monte Carlo simulation of a two-dimensional Bose gas
S. Pilati, J. Boronat, J. Casulleras +1
The equation of state of a homogeneous two-dimensional Bose gas is calculated using quantum Monte Carlo methods. The low-density universal behavior is investigated using different…
Coupling for some partial differential equations driven by white noise
Giuseppe Da Prato, Arnaud Debussche, Luciano Tubaro
We prove, using coupling arguments, exponential convergence to equilibrium for reaction--diffusion and Burgers equations driven by space-time white noise. We use a coupling by refl…
The Four Space-times Model of Reality
Giorgio Fontana
We live in a 3+1 space-time that is intended as a description of the universe with three space dimensions and one time dimension. Space-time dimensionality seems so natural that it…
Observational signatures of an electromagnetic overcritical gravitational collapse
R. Ruffini, F. Fraschetti, L. Vitagliano +1
We present theoretical predictions for the spectral, temporal and intensity signatures of the electromagnetic radiation emitted during the process of the gravitational collapse of…
Uniqueness of solutions of the stochastic Navier-Stokes equation with invariant measure given by the enstrophy
S. Albeverio, B. Ferrario
A stochastic Navier-Stokes equation with space-time Gaussian white noise is considered, having as infinitesimal invariant measure a Gaussian measure μ_ν whose covariance is given i…
Design of a Quantum Source of High-Frequency Gravitational Waves (HFGW) and Test Methodology
Giorgio Fontana
The generation of High-Frequency Gravitational Waves (HFGW) has been identified as the required breakthrough that will lead to new forms of space propulsion. Many techniques have b…
Are There Diquarks in the Nucleon?
M. Cristoforetti, P. Faccioli, G. Ripka +1
This work is devoted to the study of diquark correlations inside the nucleon. We analyze some matrix elements which encode information about the non-perturbative forces, in differe…
Parametric excitation of a Bose-Einstein condensate in a 1D optical lattice
M. Kraemer, C. Tozzo, F. Dalfovo
We study the response of a Bose-Einstein condensate to a periodic modulation of the depth of an optical lattice. Using Gross-Pitaevskii theory, we show that a modulation at frequen…
Velocity of sound in a Bose-Einstein condensate in the presence of an optical lattice and transverse confinement
Meret Kraemer, Chiara Menotti, Michele Modugno
We study the effect of the transverse degrees of freedom on the velocity of sound in a Bose-Einstein condensate immersed in a one-dimensional optical lattice and radially confined…
Landau dynamics of a grey soliton in a trapped condensate
Vladimir V. Konotop, Lev Pitaevskii
It is shown that grey soliton dynamics in an one-dimensional trap can be treated as Landau dynamics of a quasi-particle. A soliton of arbitrary amplitude moves in the trapping pote…
Mott-insulator phase of coupled 1D atomic gases in a 2D optical lattice
D. M. Gangardt, P. Pedri, L. Santos +1
We discuss the 2D Mott insulator (MI) state of a 2D array of coupled finite size 1D Bose gases. It is shown that the momentum distribution in the lattice plane is very sensitive to…