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
179 papers · 1 filter
Implementation of the Deutsch-Jozsa algorithm with Josephson charge qubits
Jens Siewert, Rosario Fazio
We investigate the realization of a simple solid-state quantum computer by implementing the Deutsch-Jozsa algorithm in a system of Josephson charge qubits. Starting from a procedur…
Eigenstates of Operating Quantum Computer: Hypersensitivity to Static Imperfections
Giuliano Benenti, Giulio Casati, Simone Montangero +1
We study the properties of eigenstates of an operating quantum computer which simulates the dynamical evolution in the regime of quantum chaos. Even if the quantum algorithm is pol…
Superconducting transition temperatures and coherence length in non s-wave pairing materials correlated with spin-fluctuation mediated interaction
G. G. N. Angilella, N. H. March, R. Pucci
Following earlier work on electron or hole liquids flowing through assemblies with magnetic fluctuations, we have recently exposed a marked correlation of the superconducting tempe…
Tc for non s-wave pairing superconductors correlated with coherence length and effective mass
G. G. N. Angilella, N. H. March, R. Pucci
For unconventional heavy Fermion superconductors, typified by UBe_13, the superconducting transition temperatures Tc are shown to correlate with a characteristic energy hbar^2 /(m*…
Which is the temperature of granular systems? A mean field model of free cooling inelastic mixtures
Umberto Marini Bettolo Marconi, Andrea Puglisi
We consider a mean field model describing the free cooling process of a two component granular mixture, a generalization of so called Maxwell model. The cooling is viewed as an ord…
Stress transmission in granular matter
Tomaso Aste, Tiziana Di Matteo, Enrico Galleani d'Agliano
The transmission of forces through a disordered granular system is studied by means of a geometrical-topological approach that reduces the granular packing into a set of layers. Th…
Quantum Effects and Broken Symmetries in Frustrated Antiferromagnets
Luca Capriotti
We investigate the interplay between frustration and zero-point quantum fluctuations in the ground state of the triangular and Heisenberg antiferromagnets, using finite…
Quantum Phase Transition in Coupled Spin Ladders
Luca Capriotti, Federico Becca
The ground state of an array of coupled, spin-half, antiferromagnetic ladders is studied using spin-wave theory, exact diagonalization (up to 36 sites) and quantum Monte Carlo tech…
Sensitivity of Quantum Motion for Classically Chaotic Systems
Giuliano Benenti, Giulio Casati
We discuss the behavior of fidelity for a classically chaotic quantum system in the metallic regime. We show the existence of a critical value of the perturbation below which the e…
Photoconductance of a one-dimensional quantum dot
M. Vicari, A. Braggio, E. Galleani d'Agliano +1
The ac-transport properties of a one-dimensional quantum dot with non-Fermi liquid correlations are investigated. It is found that the linear photoconductance is drastically influe…
Simulation of many-body interactions by conditional geometric phases
Xiaoguang Wang, Paolo Zanardi
It is shown how to exactly simulate many-body interactions and multi-qubit gates by coupling finite dimensional systems, e.g., qubits with a continuous variable. Cyclic evolution i…
A Model of Sequence Dependent Protein Diffusion Along Dna
Maria Barbi, Christophe Place, Vladislav Popkov +1
We introduce a probabilistic model for protein sliding motion along DNA during the search of a target sequence. The model accounts for possible effects due to sequence-dependent in…
Spin Coulomb drag in the two-dimensional electron liquid
Irene D'Amico, Giovanni Vignale
We calculate the spin-drag transresistivity in a two-dimensional electron gas at temperature in the random phase approximation. In the low-temperat…
Derivatives of the fixed-node energy
S. De Palo, S. Moroni, S. Baroni
We present quantum Monte Carlo calculations of total energy derivatives, consistently performed in the fixed-node approximation. Contributions from nodal displacements, neglected o…
Temporal imperfections building up correcting codes
Stefano Mancini, Rodolfo Bonifacio
We address the timing problem in realizing correcting codes for quantum information processing. To deal with temporal uncertainties we employ a consistent quantum mechanical approa…
Transport in quantum wires with impurities at finite temperatures
T. Kleimann, M. Sassetti, B. Kramer
The temperature dependence of Coulomb blockade peaks of a one dimensional quantum dot is calculated. The Coulomb interaction is treated microscopically using the Luttinger liquid m…
Phase equilibria and glass transition in colloidal systems with short-ranged attractive interactions. Application to protein crystallization
Giuseppe Foffi, Gavin D. McCullagh, Aonghus Lawlor +6
We have studied a model of a complex fluid consisting of particles interacting through a hard core and a short range attractive potential of both Yukawa and square-well form. Using…
Superfluidity vs Bose-Einstein condensation in a Bose gas with disorder
G. E. Astrakharchik, J. Boronat, J. Casulleras +1
We investigate the phenomenon of Bose-Einstein condensation and superfluidity in a Bose gas at zero temperature with disorder. By using the Diffusion Monte-Carlo method we calculat…
Quasiparticle Electronic structure of Copper in the GW approximation
Andrea Marini, Giovanni Onida, Rodolfo Del Sole
We show that the results of photoemission and inverse photoemission experiments on bulk copper can be quantitatively described within band-structure theory, with no evidence of eff…
Mode-Coupling Theory of Colloids with Short-range Attractions
K. A. Dawson, G. Foffi, F. Sciortino +2
Within the framework of the mode-coupling theory of super-cooled liquids, we investigate new phenomena in colloidal systems on approach to their glass transitions. When the inter-p…
Absence of stable collinear configurations in Ni(001)ultrathin films: canted domain structure as ground state
G. Gubbiotti, G. Carlotti, M. G. Pini +5
Brillouin light scattering (BLS) measurements were performed for (17-120) Angstrom thick Cu/Ni/Cu/Si(001) films. A monotonic dependence of the frequency of the uniform mode on an i…
Power law relaxation in a complex system: Omori law after a financial market crash
Fabrizio Lillo, Rosario N. Mantegna
We study the relaxation dynamics of a financial market just after the occurrence of a crash by investigating the number of times the absolute value of an index return is exceeding…
Doping-driven transition to a time-reversal breaking state in the phase diagram of the cuprates
G. Sangiovanni, M. Capone, S. Caprara +3
Motivated by recent tunnelling and Andreev-reflection experiments, we study the conditions for a quantum transition within the superconducting phase of the cuprates,in which a bulk…
On the connection between off-equilibrium response and statics in non disordered coarsening systems
Federico Corberi, Eugenio Lippiello, Marco Zannetti
The connection between the out of equilibrium linear response function and static properties established by Franz, Mezard, Parisi and Peliti for slowly relaxing systems is analyzed…