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
165 papers · 1 filter
Quantum Speed Limit for Change of Basis
Moein Naseri, Chiara Macchiavello, Dagmar Bruß +2
Quantum speed limits provide ultimate bounds on the time required to transform one quantum state into another. Here, we extend the notion of quantum speed limits to collections of…
Classical Dynamics of Quantum Entanglement
Giulio Casati, Italo Guarneri, Jose Reslen
We numerically analyze the dynamical generation of quantum entanglement in a system of 2 interacting particles, started in a coherent separable state, for decreasing values of $\hb…
Communication at the quantum speed limit along a spin chain
Michael Murphy, Simone Montangero, Vittorio Giovannetti +1
Spin chains have long been considered as candidates for quantum channels to facilitate quantum communication. We consider the transfer of a single excitation along a spin-1/2 chain…
Finite Quantum Grand Canonical Ensemble and Temperature from Single Electron Statistics in a Mesoscopic Device
Enrico Prati
I present a theoretical model of a quantum statistical ensemble for which, unlike in conventional physics, the total number of particles is extremely small. The thermodynamical qua…
Photon-number statistics with Silicon photomultipliers
Marco Ramilli, Alessia Allevi, Valery Chmill +3
We present a description of the operation of a multi-pixel detector in the presence of non-negligible dark-count and cross-talk effects. We apply the model to devise self-consisten…
Non-Gaussian states by conditional measurements
Marco G. Genoni, Federica A. Beduini, Alessia Allevi +3
We address realistic schemes for the generation of non-Gaussian states of light based on conditional intensity measurements performed on correlated bipartite states. We consider bo…
Correlations in photon-numbers and integrated intensities in parametric processes involving three optical fields
Jan Perina, Jaromir Krepelka, Maria Bondani +2
Two strongly-pumped parametric interactions are simultaneously realized in a single nonlinear crystal in order to generate three strongly correlated optical fields. By combining to…
Schroedinger Cat: Entanglement test in a Micro-Macroscopic system
Francesco De Martini, Fabio Sciarrino, Chiara Vitelli
A Macro-state consisting of N= 3.5 x 10^4 photons in a quantum superposition and entangled with a far apart single-photon state (Micro-state) is generated. Precisely, an entangled…
Space-QUEST: Experiments with quantum entanglement in space
Rupert Ursin, Thomas Jennewein, Johannes Kofler +36
The European Space Agency (ESA) has supported a range of studies in the field of quantum physics and quantum information science in space for several years, and consequently we hav…
Generation of time-bin entangled photons without temporal post-selection
Alessandro Rossi, Giuseppe Vallone, Francesco De Martini +1
We report on the implementation of a new interferometric scheme that allows the generation of photon pairs entangled in the time-energy degree of freedom. This scheme does not requ…
Polarization preserving ultra fast optical shutter for quantum information processing
Nicolo' Spagnolo, Chiara Vitelli, Sandro Giacomini +2
We present the realization of a ultra fast shutter for optical fields, which allows to preserve a generic polarization state, based on a self-stabilized interferometer. It exhibits…
Amplification of polarization NOON states
Chiara Vitelli, Nicolo' Spagnolo, Fabio Sciarrino +1
NOON states are path entangled states which can be exploited to enhance phase resolution in interferometric measurements. In the present paper we analyze the quantum states obtaine…
Experimental sub-Rayleigh resolution by an unseeded high-gain optical parametric amplifier for quantum lithography
Fabio Sciarrino, Chiara Vitelli, Francesco De Martini +3
Quantum lithography proposes to adopt entangled quantum states in order to increase resolution in interferometry. In the present paper we experimentally demonstrate that the output…
Active one-way quantum computation with 2-photon 4-qubit cluster states
Giuseppe Vallone, Enrico Pomarico, Francesco De Martini +1
By using 2-photon 4-qubit cluster states we demonstrate deterministic one-way quantum computation in single qubit rotation algorithm. In this operation feed-forward measurements ar…
Quantum state decorrelation
Giacomo M. D'Ariano, Rafal Demkowicz-Dobrzanski, Paolo Perinotti +1
We address the general problem of removing correlations from quantum states while preserving local quantum information as much as possible. We provide a complete solution in the ca…
Experimental macroscopic coherence by phase-covariant cloning of a single photon
Eleonora Nagali, Tiziano De Angelis, Fabio Sciarrino +1
We investigate the multiphoton states generated by high-gain optical parametric amplification of a single injected photon, polarization encoded as a ''qubit''. The experiment confi…
Experimental Realization of Polarization Qutrits from Non-Maximally Entangled States
Giuseppe Vallone, Enrico Pomarico, Paolo Mataloni +2
Based on a recent proposal [Phys. Rev. A 71, 062337 (2005)], we have experimentally realized two photon polarization qutrits by using non-maximally entangled states and linear opti…
Intensity correlations, entanglement properties and ghost imaging in multimode thermal-seeded parametric downconversion: Theory
Ivo P. Degiovanni, Maria Bondani, Emiliano Puddu +2
We address parametric-downconversion seeded by multimode pseudo-thermal fields. We show that this process may be used to generate multimode pairwise correlated states with entangle…
Experimental test of the no signaling theorem
Tiziano De Angelis, Francesco De Martini, Eleonora Nagali +1
In 1981 N. Herbert proposed a gedanken experiment in order to achieve by the ''First Laser Amplified Superluminal Hookup'' (FLASH) a faster than light communication (FTL) by quantu…
Phase-covariant cloning of coherent states
Massimiliano F. Sacchi
We consider the problem of phase-covariant cloning for coherent states. We show that an experimental scheme based on ideal phase measurement and feedforward outperforms the semicla…
Realization and characterization of a 2-photon 4-qubit linear cluster state
Giuseppe Vallone, Enrico Pomarico, Paolo Mataloni +2
We report on the experimental realization of a 4-qubit linear cluster state via two photons entangled both in polarization and linear momentum. This state was investigated by perfo…
Erasable and unerasable correlations
G. M. D'Ariano, R. Demkowicz-Dobrzanski, P. Perinotti +1
We address the problem of removing correlation from sets of states while preserving as much local quantum information as possible. We prove that states obtained from universal clon…
How continuous quantum measurements in finite dimension are actually discrete
G. Chiribella, G. M. D'Ariano, D. M. Schlingemann
We show that in finite dimension a quantum measurement with continuous set of outcomes is always equivalent to a continuous random choice of measurements with only finite outcomes.
Information-Disturbance Tradeoff in Quantum State Discrimination
Francesco Buscemi, Massimiliano F. Sacchi
When discriminating between two pure quantum states, there exists a quantitative tradeoff between the information retrieved by the measurement and the disturbance caused on the unk…