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
14 papers · 2 filters
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…
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…
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…
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…
Improving quantum interferometry by using entanglement (to take a decision you'd better use entanglement)
G. M. D'Ariano, Matteo G. A Paris, Paolo Perinotti
We address the use of entanglement to improve the precision of generalized quantum interferometry, i.e. of binary measurements aimed to determine whether or not a perturbation has…
A quantum measurement of the spin direction
G. M. D'Ariano, P. Lo Presti, M. F. Sacchi
We give a first physical model for the quantum measurement of the spin direction. It is an Arthurs-Kelly model that involves a kind of magnetic-dipole interaction of the spin with…
Using entanglement improves precision of quantum measurements
G. Mauro D'Ariano, Paoloplacido Lo Presti, Matteo G. A. Paris
We show how entanglement can be used to improve the estimation of an unknown transformation. Using entanglement is always of benefit, in improving either the precision or the stabi…
Entanglement enhanced information transmission over a quantum channel with correlated noise
Chiara Macchiavello, G. Massimo Palma
We show that entanglement is a useful resource to enhance the mutual information of the depolarizing channel when the noise on consecutive uses of the channel has some partial corr…
Efficient Quantum Computing of Complex Dynamics
Giuliano Benenti, Giulio Casati, Simone Montangero +1
We propose a quantum algorithm which uses the number of qubits in an optimal way and efficiently simulates a physical model with rich and complex dynamics described by the quantum…
Towards a tomographic picture of a Bose-Einstein condensate
Stefano Mancini, Mauro Fortunato, Paolo Tombesi +1
We investigate by means of numerical simulations the possibilities of tomographic techniques applied to a Bose-Einstein condensate in order to reconstruct its ground state. Essenti…
Nearly ideal binary communication in squeezed channels
Matteo G. A. Paris
We analyze the effect of squeezing the channel in binary communication based on Gaussian states. We show that for coding on pure states, squeezing increases the detection probabili…
A robust verification of the quantum nature of light
Matteo G. A. Paris
We present a conditional experiment involving a parametric amplifier and an avalanche photodetector to generate highly nonclassical states of the radiation field. The nonclassicali…
Enhanced absorption Hanle effect on the Fg=F->Fe=F+1 closed transitions
F. Renzoni, C. Zimmermann, P. Verkerk +1
We analyse the Hanle effect on a closed transition. Two configurations are examined, for linear- and circular-polarized laser radiation, with the applied magneti…