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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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44 papers · 1 filter
Zero Modes and Conformal Anomaly in Liouville Vortices
G. Nardelli, M. Peloso
The partition function of a two dimensional Abelian gauge model reproducing magnetic vortices is discussed in the harmonic approximation. Classical solutions exhibit conformal inva…
Dynamic structure factor and momentum distribution of a trapped Bose gas
F. Zambelli, L. P. Pitaevskii, D. M. Stamper-Kurn +1
The dynamic structure factor of a trapped Bose-Einstein condensed gas is investigated at zero temperature in the framework of Bogoliubov theory. Different values of momentum transf…
Diffusion Monte Carlo study of circular quantum dots
F. Pederiva, C. J. Umrigar, E. Lipparini
We present ground and excited state energies obtained from Diffusion Monte Carlo (DMC) calculations, using accurate multiconfiguration wave functions, for electrons ()…
Collisionless dynamics of dilute Bose gases: Role of quantum and thermal fluctuations
S. Giorgini
We study the low-energy collective oscillations of a dilute Bose gas at finite temperature in the collisionless regime. By using a time-dependent mean-field scheme we derive for th…
The Raman coupling function in amorphous silica and the nature of the long wavelength excitations in disordered systems
A. Fontana, R. Dell'Anna, M. Montagna +6
New Raman and incoherent neutron scattering data at various temperatures and molecular dynamic simulations in amorphous silica, are compared to obtain the Raman coupling coefficien…
Dirac Functional Determinants in Terms of the Eta Invariant and the Noncommutative Residue
Guido Cognola, Emilio Elizalde, Sergio Zerbini
The zeta and eta-functions associated with massless and massive Dirac operators, in a D-dimensional (D odd or even) manifold without boundary, are rigorously constructed. Several m…
Acoustic Nature of the Boson Peak in Vitreous Silica
C. Masciovecchio, V. Mazzacurati, G. Monaco +13
New temperature dependent inelastic x-ray (IXS) and Raman (RS) scattering data are compared to each other and with existing inelastic neutron scattering data in vitreous silica (v-…
Phonon-like and single particle dynamics in liquid lithium
T. Scopigno, U. Balucani, A. Cunsolo +4
The dynamic structure factor, S(Q,E), of liquid lithium (T=475 K) has been determined by inelastic x-ray scattering (IXS) in the momentum transfer region (Q = 1.4-110 nm-1). These…
Photodisintegration of Three-Body Nuclei with Realistic 2N and 3N Forces
Victor D. Efros, Winfried Leidemann, Giuseppina Orlandini +1
Total photonuclear absorption cross sections of H and He are studied using realistic NN and NNN forces. Final state interactions are fully included. Two NN potential models…
State Dependent Effective Interaction for the Hyperspherical Formalism
Nir Barnea, Winfried Leidemann, Giuseppina Orlandini
The method of effective interaction, traditionally used in the framework of an harmonic oscillator basis, is applied to the hyperspherical formalism of few-body nuclei (A=3-6). The…
Describing the nucleon and its form factors at high q**2
B. Desplanques, B. Silvestre-Brac, F. Cano +2
The nucleon form factors are calculated using a non-relativistic description in terms of constituent quarks. The emphasis is put on the reliability of present numerical methods use…
w_{\infty} Algebras, Conformal Mechanics, and Black Holes
Sergio Cacciatori, Dietmar Klemm, Daniela Zanon
We discuss BPS solitons in gauged , D=4 supergravity. The solitons represent extremal black holes interpolating between different vacua of anti-de Sitter spaces. The is…
A superfluid hydrodynamic model for the enhanced moments of inertia of molecules in liquid 4He
C. Callegari, A. Conjusteau, I. Reinhard +3
We present a superfluid hydrodynamic model for the increase in moment of inertia, , of molecules rotating in liquid He. The static inhomogeneous He density around each mole…
The London field in bulk layered superconductors
G. Modanese
In a composite superconductor in uniform rotation, the London field strength at equilibrium is given by the usual expression B_L = 2m Omega/e; here m corresponds to the bare electr…
Bosonic Field Propagators on Algebraic Curves
Franco Ferrari, Jan Sobczyk
In this paper we investigate massless scalar field theory on non-degenerate algebraic curves. The propagator is written in terms of the parameters appearing in the polynomial defin…
Electromagnetic response functions of few-nucleon systems
V. D. Efros, W. Leidemann, G. Orlandini +1
Inclusive electromagnetic reactions in few-nucleon systems are studied basing on accurate three- and four-body calculations. The longitudinal 4He(e,e') response function obtained a…
Thermodynamics of Kerr-Newman-AdS Black Holes and Conformal Field Theories
Marco M. Caldarelli, Guido Cognola, Dietmar Klemm
We study the thermodynamics of four-dimensional Kerr-Newman-AdS black holes both in the canonical and the grand-canonical ensemble. The stability conditions are investigated, and t…
Proof of the symmetry of the off-diagonal Hadamard/Seeley-deWitt's coefficients in Lorentzian manifolds by a local Wick rotation
Valter Moretti
Completing the results obtained in a previous paper, we prove the symmetry of Hadamard/Seeley-deWitt off-diagonal coefficients in smooth -dimensional Lorentzian manifolds. To th…
Nucleation in dilute 3He-4He liquid mixtures at low temperatures
M. Barranco, M. Guilleumas, D. M. Jezek +3
We present a study of phase separation from supersaturated 3He-4He liquid mixtures at low temperatures addressing both the degree of critical supersaturation Dx and the thermal-to-…
Parton distributions in a constituent quark scenario
S. Scopetta, V. Vento, M. Traini
A simple picture of the constituent quark as a composite system of point-like partons is used to construct the unpolarized and polarized parton distributions by a convolution betwe…
Wave-vector dependence of spin and density multipole excitations in quantum dots
Manuel Barranco, Leonardo Colletti, Agusti Emperador +3
We have employed time-dependent local-spin density functional theory to analyze the multipole spin and charge density excitations in GaAs-AlGaAs quantum dots. The on-plane transfer…
Scissors mode and superfluidity of a trapped Bose-Einstein condensed gas
D. Guery-Odelin, S. Stringari
We investigate the oscillation of a dilute atomic gas generated by a sudden rotation of the confining trap (scissors mode). This oscillation reveals the effects of superfluidity ex…
Free expansion of Bose-Einstein condensates with quantized vortices
Franco Dalfovo, Michele Modugno
The expansion of Bose-Einstein condensates with quantized vortices is studied by solving numerically the time-dependent Gross-Pitaevskii equation at zero temperature. For a condens…
Numerical invariants for bundles on blow-ups
E. Ballico, E. Gasparim
We suggest an effective procedure to calculate numerical invariants for rank two bundles over blown-up surfaces. We study the moduli spaces M_j of bundles on the blown-up plane spl…