Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Istituto Nazionale di Fisica Nucleare, Sezione di PaviaIT2.8k papers
- European Organization for Nuclear ResearchCH2.1k papers
- The Ohio State UniversityUS2k papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIT2k papers
- National and Kapodistrian University of AthensGR2k papers
- Centre National de la Recherche ScientifiqueFR2k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.9k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT1.9k papers
- Sapienza University of RomeIT1.9k papers
- University of PisaIT1.9k papers
- University of BolognaIT1.9k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT1.8k papers
9 papers · 2 filters
On the general problem of quantum phase estimation
G. M. D'Ariano, C. Macchiavello, M. F. Sacchi
The problem of estimating a generic phase-shift experienced by a quantum state is addressed for a generally degenerate phase shift operator. The optimal positive operator-valued me…
Adaptive Quantum Homodyne Tomography
Giacomo M. D'Ariano, Matteo G. A. Paris
An adaptive optimization technique to improve precision of quantum homodyne tomography is presented. The method is based on the existence of so-called null functions, which have ze…
Entanglement and visibility at the output of a Mach-Zehnder interferometer
Matteo G. A. Paris
We study the entanglement between the two beams exiting a Mach-Zehnder interferometer fed by a couple of squeezed-coherent states with arbitrary squeezing parameter. The quantum co…
Quantum tomography of mesoscopic superpositions of radiation states
G. M. D'Ariano, C. Macchiavello, L. Maccone
We show the feasibility of a tomographic reconstruction of Schrödinger cat states generated according to the scheme proposed by S. Song, C.M. Caves and B. Yurke [Phys. Rev. A 41, 5…
Generation of phase-coherent states
Giacomo M. D'Ariano, Matteo G. A. Paris, Massimiliano F. Sacchi
An interaction scheme involving nonlinear media is suggested for the generation of phase-coherent states (PCS). The setup is based on parametric amplification of vacuum f…
Quantum Binary Decision for Driven Harmonic Oscillator
Matteo G. A. Paris
We address the problem of determining whether or not a harmonic oscillator has been perturbed by an external force. Quantum detection and estimation theory has been used in devisin…
A two-step optimized measurement for the phase-shift
A. V. Chizhov, V. De Renzi, M. G. A. Paris
A two-step detection strategy is suggested for the precise measurement of the optical phase-shift. In the first step an unsharp, however, unbiased joint measurement of the phase an…
Noise, errors and information in quantum amplification
G. M. D'Ariano, C. Macchiavello, L. Maccone
We analyze and compare the characterization of a quantum device in terms of noise, transmitted bit-error-rate (BER) and mutual information, showing how the noise description is mea…
A quantum-mechanical study of optical regenerators based on nonlinear-loop mirrors
Giacomo M. D'Ariano, Prem Kumar
We present a quantum-mechanical analysis of a nonlinear interferometer that achieves optical switching via cross-phase modulation resulting from the Kerr effect. We show how it per…