10.1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Sapienza University of RomeIT156 papers
- Scuola Internazionale Superiore di Studi AvanzatiIT146 papers
- University of InsubriaIT88 papers
- University of MilanIT85 papers
- University of TrentoIT85 papers
- Politecnico di TorinoIT78 papers
- University of FlorenceIT74 papers
- University of GenoaIT69 papers
- Centre National de la Recherche ScientifiqueFR65 papers
- The Abdus Salam International Centre for Theoretical Physics (ICTP)IT65 papers
- National Research CouncilLK58 papers
- University of SalernoIT56 papers
38 papers · 1 filter
Band structure and optical anisotropy in V-shaped and T-shaped semiconductor quantum wires
G. Goldoni, F. Rossi, E. Molinari +1
We present a theoretical investigation of the electronic and optical properties of V- and T-shaped quantum wires. Valence band mixing as well as realistic sample geometries are ful…
Search for non-Poissonian behavior in nuclear beta-decay
Giorgio Concas, Marcello Lissia
We performed two independent counting experiments on a beta-emitting source of Sm151 by measuring the gamma-photon emitted in a fraction of the decays. For counting times ranging f…
Scaling and thermodynamics of a trapped Bose-condensed gas
S. Giorgini, L. Pitaevskii, S. Stringari
We investigate the thermodynamics of a Bose gas interacting with repulsive forces and confined in a harmonic trap. We show that the relevant parameters of the system (temperature,…
Nonlinear Dynamics of a Bose Condensed Gas
F. Dalfovo, C. Minniti, S. Stringari +1
We investigate the dynamic behavior of a Bose-condensed gas of alkali atoms interacting with repulsive forces and confined in a magnetic trap at zero temperature. Using the Thomas-…
Ponderomotive Control of Quantum Macroscopic Coherence
S. Mancini, V. I. Man'ko, P. Tombesi
It is shown that because of the radiation pressure a Schrödinger cat state can be generated in a resonator with oscillating wall. The optomechanical control of quantum macroscopic…
Density Matrix From Photon Number Tomography
Stefano Mancini, Paolo Tombesi, Vladimir I. Manko
We provide a simple analytic relation which connects the density operator of the radiation field with the number probabilities. The problem of experimentally "sampling" a general m…
New critical behaviour of the three-dimensional Ising model with nearest-neighbor, next-nearest-neighbor and plaquette interactions
E. N. M. Cirillo, G. Gonnella, A. Pelizzola
The critical and multicritical behavior of the simple cubic Ising model with nearest-neighbor, next-nearest-neighbor and plaquette interactions is studied using the cube and star-c…
On the low-temperature phase of the three-state antiferromagnetic Potts model on the simple cubic lattice
Alessandro Pelizzola
The three-state antiferromagnetic Potts model on the simple cubic lattice is investigated using the cluster variation method in the cube and the star-cube approximations. The broke…
Geometric dynamical observables in rare gas crystals
Lapo Casetti, Alessandro Macchi
We present a detailed description of how a differential geometric approach to Hamiltonian dynamics can be used for determining the existence of a crossover between different dynami…
Hydrodynamic modes in a trapped Bose gas above the Bose-Einstein transition
A. Griffin, Wen-Chin Wu, S. Stringari
We discuss the collective modes of a trapped Bose gas in the hydrodynamic regime where atomic collisions ensure local thermal equilibrium for the distribution function. Starting fr…
Diffusion and localization in chaotic billiards
Fausto Borgonovi, Giulio Casati, Baowen Li
We study analytically and numerically the classical diffusive process which takes place in a chaotic billiard. This allows to estimate the conditions under which the statistical pr…
A Transfer Matrix study of the staggered BCSOS model
Enrico Carlon, Giorgio Mazzeo, Henk van Beijeren
The phase diagram of the staggered six vertex, or body centered solid on solid model, is investigated by transfer matrix and finite size scaling techniques. The phase diagram conta…
The structure and phase stability of CO adsorbates on Rh(110)
Dario Alfe', Stefano Baroni
The structure of CO adsorbates on the Rh(110) surface is studied at full coverage using first-principles techniques. The relative energies of different adsorbate geometries are det…
Phonon Softening and Elastic Instabilities in the Cubic-to-Orthorhombic Structural Transition of CsH
A. M. Saitta, D. Alfe`, S. de Gironcoli +1
The cubic-to-orthorhombic structural transition occurring in CsH at a pressure of about 17 GPa is studied by ab initio calculations. The relative stability of the competing structu…
Electron Correlation and Charge Transfer Instability in Bilayered Two Dimensional Electron Gas
Sergio Conti, Gaetano Senatore
We prove that the predicted charge transfer state in symmetric bilayers of two dimensional electron gases is always unstable at zero bias voltage, due to interlayer correlation and…
Momentum distribution of liquid helium
Saverio Moroni, Gaetano Senatore, Stefano Fantoni
We have obtained the one--body density matrix and the momentum distribution of liquid He at K from Diffusion Monte Carlo (DMC) simulations, using trial function…
Valence band spectroscopy in V-grooved quantum wires
G. Goldoni, F. Rossi, E. Molinari +3
We present a combined theoretical and experimental study of the anisotropy in the optical absorption of V-shaped quantum wires. By means of realistic band structure calculations fo…
Impurity in a Luttinger liquid: a numerical study of the finite size energy spectrum and of the orthogonality catastrophe exponent
Shaojin Qin, Michele Fabrizio, Lu Yu
The behavior of a single impurity in a one-dimensional Luttinger liquid is numerically investigated by means of the density matrix renormalization group. By analyzing the finite si…
Microscopic Oscillations in the Quantum Nucleation of Vortices Subject to Periodic Pinning Potential in a Thin Superconductor
Roberto Iengo, Giancarlo Jug
We present a theory for the decay of a supercurrent through nucleation of vortex-antivortex pairs in a two-dimensional superconductor in the presence of dissipation and of a period…
Condensate fraction and critical temperature of a trapped interacting Bose gas
S. Giorgini, L. Pitaevskii, S. Stringari
By using a mean field approach, based on the Popov approximation, we calculate the temperature dependence of the condensate fraction of an interacting Bose gas confined in an aniso…
Predictability in the large: an extension of the concept of Lyapunov exponent
E. Aurell, G. Boffetta, A. Crisanti +2
We investigate the predictability problem in dynamical systems with many degrees of freedom and a wide spectrum of temporal scales. In particular, we study the case of turbule…
Phonon softening and superconductivity in tellurium under pressure
Francesco Mauri, Oleg Zakharov, Stefano de Gironcoli +2
The phonon dispersion and the electron-phonon interaction for the -Po and the bcc high pressure phases of tellurium are computed with density-functional perturbation theory. Our…
Diffusion in disordered media as a process with memory
Michele Vendruscolo, Matteo Marsili
The problem of a random walk in a disordered media is mapped into a model of a random walk with memory. The latter model, as opposed to the former one, does not make reference to a…
Vortex excitation in superfluid 4He: A Diffusion Monte Carlo study
S. Giorgini, J. Boronat, J. Casulleras
We present a diffusion Monte Carlo study of a single vortex in two-dimensional superfluid liquid He within the fixed node approximation. We use both the Feynman phase and an im…