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
103 papers · 1 filter
Coulomb correlation effects in semiconductor quantum dots: The role of dimensionality
Massimo Rontani, Fausto Rossi, Franca Manghi +1
We study the energy spectra of small three-dimensional (3D) and two-dimensional (2D) semiconductor quantum dots through different theoretical approaches (single-site Hubbard and Ha…
The Puzzling Stability of Monatomic Gold Wires
J. A. Torres, E. Tosatti, A. Dal Corso +4
We have examined theoretically the spontaneous thinning process of tip-suspended nanowires, and subsequently studied the structure and stability of the monatomic gold wires recentl…
Phase diagram of quantized vortices in a trapped Bose-Einstein condensed gas
S. Stringari
We investigate the thermodynamic stability of quantized vortices in a dilute Bose gas confined by a rotating harmonic trap at finite temperature. Interatomic forces play a crucial…
Endoscopic Tomography and Quantum-Non-Demolition
Mauro Fortunato, Paolo Tombesi, Wolfgang P. Schleich
We propose to measure the quantum state of a single mode of the radiation field in a cavity---the signal field---by coupling it via a quantum-non-demolition Hamiltonian to a meter…
Fractal dimension of space-time chaos
Antonio Politi, Annette Witt
A class of simplified measures is constructed to capture the key features of generic spatio-temporally chaotic systems. A combined analytical and numerical investigation allows us…
Local Optical Spectroscopy in Quantum Confined Systems: A Theoretical Description
O. Mauritz, G. Goldoni, F. Rossi +1
A theoretical description of local absorption is proposed in order to investigate spectral variations on a length scale comparable with the extension of the relevant quantum states…
The quantum Heisenberg antiferromagnet on the square lattice
A. Cuccoli, V. Tognetti, P. Verrucchi +1
The pure-quantum self-consistent harmonic approximation, a semiclassical method based on the path-integral formulation of quantum statistical mechanics, is applied to the study of…
The reconstruction of Ni and Rh (001) surfaces upon Carbon, Nitrogen, or Oxygen adsorption
Dario Alfe`, Stefano de Gironcoli, Stefano Baroni
Nickel and Rhodium (001) surfaces display a similar - as from STM images - clock reconstruction when half a monolayer of C/Ni, N/Ni or O/Rh is adsorbed; no reconstruction is observ…
Molecular Correlations in a Supercooled Liquid
L. Fabbian, A. Latz, R. Schilling +3
We present static and dynamic properties of molecular correlation functions S_{lmn,l'm'n'}(q,t) in a simulated supercooled liquid of water molecules, as a preliminary effort in the…
A Variational Approach to the Localization Transition of Heteropolymers at Interfaces
Antonio Trovato, Amos Maritan
A chain with random hydrophobic-hydrophilic charges is studied in the presence of an interface separating a polar from a non polar solvent. Within a Gaussian variational approach i…
Bethe Ansatz solution of a new class of Hubbard-type models
A. Osterloh, L. Amico, U. Eckern
We define one-dimensional particles with generalized exchange statistics. The exact solution of a Hubbard-type Hamiltonian constructed with such particles is achieved using the Coo…
Andreev Tunneling in Strongly Interacting Quantum Dots
R. Raimondi, P. Schwab
We review recent work on resonant Andreev tunneling through a strongly interacting quantum dot connected to a normal and to a superconducting lead. We derive a general expression f…
Ab initio optical properties of Si(100)
Maurizia Palummo, Giovanni Onida, Rodolfo Del Sole +1
We compute the linear optical properties of different reconstructions of the clean and hydrogenated Si(100) surface within DFT-LDA, using norm-conserving pseudopotentials. The equi…
Effective Hamiltonian with holomorphic variables
A. Cuccoli, V. Tognetti, R. Giachetti +2
The pure-quantum self-consistent harmonic approximation (PQSCHA) permits to study a quantum system by means of an effective classical Hamiltonian - depending on quantum coupling an…
Local Density of States in Superconductor-Ferromagnetic Hybrid Systems
Rosario Fazio, Carlo Lucheroni
In this Letter we discuss various properties of the local density of states (DOS) for a superconductor-ferromagnet hybrid system. The DOS is modified at small energies on both side…
Properties of superconductor - Luttinger liquid hybrid systems
Rosario Fazio, F. W. J. Hekking, A. A. Odintsov +1
In this paper we review some recent results concerning the physics of superconductor - Luttinger liquid proximity systems. We discuss both equilibrium (the pair amplitude, Josephso…
Sub-gap conductance in ferromagnetic-superconducting mesoscopic structures
M. Leadbeater, C. J. Lambert, R. Raimondi +1
We study the sub-gap conductance of a ferromagnetic mesoscopic region attached to a ferromagnetic and a superconducting electrode by means of tunnel junctions. In the absence of th…
On the strong anomalous diffusion
P. Castiglione, A. Mazzino, P. Muratore-Ginanneschi +1
The superdiffusion behavior, i.e. , with , in general is not completely characherized by a unique exponent. We study some systems exhibiting strong a…
Interface pinning and slow ordering kinetics on infinitely ramified fractal structures
Umberto Marini Bettolo Marconi
We investigate the time dependent Ginzburg-Landau (TDGL) equation for a non conserved order parameter on an infinitely ramified (deterministic) fractal lattice employing two altern…
Geometric approach to chaos in the classical dynamics of abelian lattice gauge theory
Lapo Casetti, Raoul Gatto, Marco Pettini
A Riemannian geometrization of dynamics is used to study chaoticity in the classical Hamiltonian dynamics of a U(1) lattice gauge theory. This approach allows one to obtain analyti…
Sharp k-space features in the order parameter within the interlayer pair-tunneling mechanism of high-T_c superconductivity
G. G. N. Angilella, R. Pucci, F. Siringo +1
We study the k-dependence of the gap function of a bilayer superconductor, using standard mean-field techniques applied to a 2D extended Hubbard model, in the presence of coherent…
Multiscale behaviour of volatility autocorrelations in a financial market
Michele Pasquini, Maurizio Serva
We perform a scaling analysis on NYSE daily returns. We show that volatility correlations are power-laws on a time range from one day to one year and, more important, that they exh…
Topological aspects of geometrical signatures of phase transitions
Roberto Franzosi, Lapo Casetti, Lionel Spinelli +1
Certain geometric properties of submanifolds of configuration space are numerically investigated for classical lattice phi^4 models in one and two dimensions. Peculiar behaviors of…
Chaos in coplanar classical collisions with particles interacting through forces
F. Sattin, L. Salasnich
The scattering among three particles interacting through forces, with opposite charges and widely different masses, is studied in a coplanar geometry. The present work show…