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
139 papers · 1 filter
Wannier functions for quasi-periodic finite-gap potentials
E. D. Belokolos, V. Z. Enolskii, M. Salerno
In this paper we consider Wannier functions of quasi-periodic g-gap () potentials and investigate their main properties. In particular, we discuss the problem of averaging…
Modulation of dephasing due to a spin-boson environment
E. Paladino, M. Sassetti, G. Falci
We study the reduced dynamics of a spin (qubit) coupled to a spin-boson environment in the case of pure dephasing. We derive formal exact expressions which can be cast in terms of…
Role of strong correlation in the recent ARPES experiments for cuprate superconductors
S. Yunoki, E. Dagotto, S. Sorella
Motivated by recent photoemission experiments on cuprates, the low-lying excitations of a strongly correlated superconducting state are studied numerically. It is observed that alo…
The entropy multiparticle-correlation expansion for a mixture of spherical and elongated particles
S. Prestipino, P. V. Giaquinta
We derive the multiparticle-correlation expansion of the excess entropy of classical particles in the canonical ensemble using a new approach that elucidates the rationale behind e…
Shot noise in charge and magnetization currents of a quantum ring
F. Cavaliere, F. Haupt, R. Fazio +1
The shot noise in a quantum ring, connected to leads, is studied in the presence of electron interactions in the sequential tunneling regime. Two qualitatively different noise corr…
Entanglement and factorized ground states in two-dimensional quantum antiferromagnets
Tommaso Roscilde, Paola Verrucchi, Andrea Fubini +2
Making use of exact results and quantum Monte Carlo data for the entanglement of formation, we show that the ground state of anisotropic two-dimensional S=1/2 antiferromagnets in a…
Quantum-enhanced measurements: beating the standard quantum limit
Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone
Quantum mechanics, through the Heisenberg uncertainty principle, imposes limits to the precision of measurement. Conventional measurement techniques typically fail to reach these l…
Spin dynamics of heterometallic Cr7M wheels (M = Mn, Zn, Ni) probed by inelastic neutron scattering
R. Caciuffo, T. Guidi, G. Amoretti +7
Inelastic neutron scattering has been applied to the study of the spin dynamics of Cr-based antiferromagnetic octanuclear rings where a finite total spin of the ground state is obt…
Entanglement in quantum critical spin systems
Tommaso Roscilde, Paola Verrucchi, Andrea Fubini +2
We study the field dependence of the entanglement of formation in anisotropic S=1/2 antiferromagnetic chains and two-leg ladders displaying a T=0 field-driven quantum phase transit…
Realization of the 1->3 optimal phase-covariant quantum cloning machine
Fabio Sciarrino, Francesco De Martini
The 1->3 quantum phase covariant cloning, which optimally clones qubits belonging to the equatorial plane of the Bloch sphere, achieves the fidelity Fcov(1->3)=0.833, larger than f…
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…
Analytical probabilistic approach to the ground state of lattice quantum systems: exact results in terms of a cumulant expansion
Massimo Ostilli, Carlo Presilla
We present a large deviation analysis of a recently proposed probabilistic approach to the study of the ground-state properties of lattice quantum systems. The ground-state energy,…
The inelastic hard dimer gas: a non-spherical model for granular matter
Giulio Costantini, Umberto Marini Bettolo Marconi, Galina Kalibaeva +1
We study a two-dimensional gas of inelastic smooth hard dimers. Since the collisions between dimers are dissipative, being characterized by a coefficient of restitution , and…
Clean and Dirty Superconductivity in Pure, Al doped, and Neutron Irradiated MgB2: a Far-Infrared Study
M. Ortolani, D. Di Castro, P. Postorino +4
The effects of Al substitution and neutron irradiation on the conduction regime (clean or dirty) of the - and -band of MgB have been investigated by means of far-infrar…
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…
Anomalous scaling of passively advected magnetic field in the presence of strong anisotropy
M. Hnatich, J. Honkonen, M. Jurcisin +2
Inertial-range scaling behavior of high-order (up to order N=51) structure functions of a passively advected vector field has been analyzed in the framework of the rapid-change mod…
Upper Critical Fields up to 60T in Dirty Magnesium Diboride Thin Films
C. Ferdeghini, V. Ferrando, C. Tarantini +11
Upper critical fields of several magnesium diboride thin films were measured up to 28 T at the Grenoble High Magnetic Field Laboratory (GHMFL) in Grenoble and up to 60 T at the Lab…
Ground state of many-body lattice systems via a central limit theorem
Carlo Presilla, Massimo Ostilli
We review a novel approach to evaluate the ground-state properties of many-body lattice systems based on an exact probabilistic representation of the dynamics and its long time app…
W=0 pairing in Hubbard and related models of low-dimensional superconductors
Adalberto Balzarotti, Michele Cini, Enrico Perfetto +1
Lattice Hamiltonians with on-site interaction have W=0 solutions, that is, many-body {\em singlet} eigenstates without double occupation. In particular, W=0 pairs give a clue t…
Microscopic Model for a Strongly Correlated Superconducting Single-Electron-Transistor
Enrico Perfetto, Michele Cini
We model a Superconducting Single-Electron Transistor operating by repulsive interactions. The device consists of a ring of Hubbard clusters, placed between electrodes and capaciti…
Laser acceleration of ion bunches at the front surface of overdense plasmas
Andrea Macchi, Federica Cattani, Tatiana V. Liseykina +1
The acceleration of ions in the interaction of high intensity laser pulses with overdense plasmas is investigated with particle-in-cell simulations. For circular polarization of th…
Magnetic oscillations in planar systems with the Dirac-like spectrum of quasiparticle excitations II: transport properties
V. P. Gusynin, S. G. Sharapov
The quantum magnetic oscillations of electrical (Shubnikov de Haas effect) and thermal conductivities are studied for graphene which represents a distinctive example of planar syst…
Enhancement of rare-earth--transition-metal exchange interaction in PrFe probed by inelastic neutron scattering
N. Magnani, S. Carretta, G. Amoretti +4
The fundamental magnetic interactions of PrFe are studied by inelastic neutron scattering and anisotropy field measurements. Data analysis confirms the presence of thr…
Realization of the Optimal Universal Quantum Entangler
Fabio Sciarrino, Francesco De Martini, Vladimir Buzek
We present the first experimental demonstration of the ''optimal'' and ''universal'' quantum entangling process involving qubits encoded in the polarization of single photons. The…