Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And ApplicationsIT1.4k papers
- Centre National de la Recherche ScientifiqueFR1.3k papers
- University of PisaIT1.2k papers
- Sapienza University of RomeIT1.2k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT1.1k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT1.1k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di GenovaIT1.1k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di NapoliIT1.1k papers
- Rutherford Appleton LaboratoryGB1k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1k papers
- University of BolognaIT1k papers
32 papers · 1 filter
Quantum effects of stringy and membranic nature for the swimming of micro-organisms in a fluid
E. Elizalde, M. Kawamura, S. Nojiri +2
The static potential is investigated in string and membrane theories coupled to gauge fields (specifically, external magnetic fields) and with antisymmetric tensor fields. T…
Interaction of Low - Energy Induced Gravity with Quantized Matter -- II. Temperature effects
Guido Cognola, Ilya L. Shapiro
At the very early Universe the matter fields are described by the GUT models in curved space-time. At high energies these fields are asymptotically free and conformally coupled to…
Surface Region of Superfluid Helium as an Inhomogeneous Bose-Condensed Gas
A. Griffin, S. Stringari
We present arguments that the low density surface region of self-bounded superfluid He systems is an inhomogeneous dilute Bose gas, with almost all of the atoms occupying the s…
Lower Bound on the Pion Polarizability from QCD Sum Rules
M. Benmerrouche, G. Orlandini, T. G. Steele
Making use of QCD sum rules a lower bound is found which relates the electromagnetic polarizability and mean-square radius of charged pions through…
Dilatonic gravity near two dimensions as a string theory
E. Elizalde, S. D. Odintsov
Using the renormalization-group formalism, a sigma model of a special type- in which the metric and the dilaton depend explicitly on one of the string coordinates only-is investiga…
Structure of binary clusters: are icosahedra relevant ?
Stefano Cozzini, Marco Ronchetti
We investigate the structure of 13-particle clusters in binary alloys for various size ratios and different concentrations via MD simulation. Our goal is to predict which systems a…
Bosons in anisotropic traps: ground state and vortices
F. Dalfovo, S. Stringari
We solve the Gross-Pitaevskii equations for a dilute atomic gas in a magnetic trap, modeled by an anisotropic harmonic potential. We evaluate the wave function and the energy of th…
Hessling's Quantum Equivalence Principle and the Temperature of an Extremal Reissner-Nordström Black Hole
Valter Moretti
The Hessling improvement of the Haag, Narnhofer and Stein principle is analysed in the case of a massless scalar field propagating outside of an extremal R-N black hole. It is foun…
Radiation from the extremal black holes
Luciano Vanzo
The radiation from extreme Reissner-Nordström black holes is computed by explicitly considering the collapse of a spherical charged shell. No neutral scalar radiation is found but…
Moment of Inertia and Superfluidity of a Trapped Bose Gas
S. Stringari
The temperature dependence of the moment of inertia of a dilute Bose gas confined in a harmonic trap is determined. Deviations from the rigid value, due to the occurrence of Bose-E…
A Bisognano-Wichmann-like Theorem in a Certain Case of a Non Bifurcate Event Horizon related to an Extreme Reissner-Nordström Black Hole
Valter Moretti, Stefan Steidl
Thermal Wightman functions of a massless scalar field are studied within the framework of a ``near horizon'' static background model of an extremal R-N black hole. This model is bu…
Finite Temperature Effects for Massive Fields in D-dimensional Rindler-like Spaces
Andrei A. Bytsenko, Guido Cognola, Sergio Zerbini
The first quantum corrections to the free energy for massive fields in -dimensional space-times of the form $\R\times\R^+\times\M^{N-1}$, where and $\M^{N-1}$ is a const…
Heat-kernel coefficients and functional determinants for higher-spin fields on the ball
Klaus Kirstem, Guido Cognola
The zeta function associated with higher-spin fields on the Euclidean -ball is investigated. The leading coefficients of the corresponding heat-kernel expansion are given explic…
Casimir energy of a massive field in a genus-1 surface
K. Kirsten, E. Elizalde
We review the definition of the Casimir energy steming naturally from the concept of functional determinant through the zeta function prescription. This is done by considering the…
Biharmonic Conformal Field Theories
Franco Ferrari
The main result of this paper is the construction of a conformally covariant operator in two dimensions acting on scalar fields and containing fourth order derivatives. In this way…
Constraints on QCD Sum-rules from the Hölder Inequalities
M. Benmerrouche, G. Orlandini, T. G. Steele
A new technique based on Hölder's integral inequality is applied to QCD sum-rules to provide fundamental constraints on the sum-rule parameters. These constraints must be satisfied…
Thermal Wightman Functions and Renormalized Stress Tensors in the Rindler Wedge
Valter Moretti, Luciano Vanzo
The Wightman functions in the Rindler portion of Minkowski space-time are presented for any value of the temperature and for massless spin fields up to s=1 and the renormalized str…
Wightman Functions' Behaviour on the Event Horizon of an Extremal Reissner-Nordström Black Hole
V. Moretti
A weaker Haag, Narnhofer and Stein prescription as well as a weaker Hessling Quantum Equivalence Principle for the behaviour of thermal Wightman functions on an event horizon are a…
Rotons and Quantum Evaporation from Superfluid 4He
F. Dalfovo, A. Fracchetti, A. Lastri +2
The probability of evaporation induced by and rotons at the surface of superfluid helium is calculated using time dependent density functional theory. We consider excit…
Quantum Fields and Extended Objects in Space-Times with Constant Curvature Spatial Section
A. A. Bytsenko, G. Cognola, L. Vanzo +1
The heat-kernel expansion and -regularization techniques for quantum field theory and extended objects on curved space-times are reviewed. In particular, ultrastatic space-times…
Monte-Carlo simulations of the recombination dynamics in porous silicon
H. Eduardo Roman, Lorenzo Pavesi
A simple lattice model describing the recombination dynamics in visible light emitting porous Silicon is presented. In the model, each occupied lattice site represents a Si crystal…
One-loop Quantum Corrections to the Entropy for an Extremal Reissner-Nordström Black Hole
G. Cognola, L. Vanzo, S. Zerbini
The first quantum corrections to the entropy for an eternal 4-dimensional extremal Reissner-Nordström black hole is investigated at one-loop level, in the large mass limit of the b…
Raman scattering from fractals. Simulation on large structures by the method of moments
G. Viliani, R. Dell'Anna, O. Pilla +4
We have employed the method of spectral moments to study the density of vibrational states and the Raman coupling coefficient of large 2- and 3- dimensional percolators at threshol…
Density functional calculations for 4He droplets
M. Casas, F. Dalfovo, A. Lastri +2
A novel density functional, which accounts correctly for the equation of state, the static response function and the phonon-roton dispersion in bulk liquid helium, is used to predi…