493 citations · 12.2k across the 287 of their papers we have counts for
12 papers · 2 filters
Bayesian estimation of one-parameter qubit gates
Berihu Teklu, Stefano Olivares, Matteo G A Paris
We address estimation of one-parameter unitary gates for qubit systems and seek for optimal probes and measurements. Single- and two-qubit probes are analyzed in details focusing o…
The quantum-classical transition in thermally seeded parametric downconversion
Ivo P Degiovanni, Marco Genovese, Valentina Schettini +3
We address the pair of conjugated field modes obtained from parametric-downconversion as a convenient system to analyze the quantum-classical transition in the continuous variable…
Tripartite entanglement transfer from flying modes to localized qubits
Federico Casagrande, Alfredo Lulli, Matteo G. A. Paris
We investigate the process of entanglement transfer from a three-mode quantized field to a system of three spatially separated qubits each one made of a two-level atom resonantly c…
Demonstration of a bright and compact source of tripartite nonclassical light
Alessia Allevi, Maria Bondani, Matteo G. A. Paris +1
We experimentally demonstrate the nonclassical photon number correlations expected in tripartite continuous variable states obtained by parametric processes. Our scheme involves a…
Optimal quantum estimation in spin systems at criticality
Carmen Invernizzi, Michael Korbman, Lorenzo Campos Venuti +1
It is a general fact that the coupling constant of an interacting many-body Hamiltonian do not correspond to any observable and one has to infer its value by an indirect measuremen…
Full characterization of Gaussian bipartite entangled states by a single homodyne detector
V. D'Auria, S. Fornaro, A. Porzio +3
We present the full experimental reconstruction of Gaussian entangled states generated by a type--II optical parametric oscillator (OPO) below threshold. Our scheme provides the en…
Quantifying the non-Gaussian character of a quantum state by quantum relative entropy
Marco G. Genoni, Matteo G. A. Paris, Konrad Banaszek
We introduce a novel measure to quantify the non-Gaussian character of a quantum state: the quantum relative entropy between the state under examination and a reference Gaussian st…
Non-Gaussianity and purity in finite dimension
Marco G. Genoni, Matteo G. A. Paris
We address truncated states of continuous variable systems and analyze their statistical properties numerically by generating random states in finite-dimensional Hilbert spaces. In…
Optimal estimation of entanglement
Marco G. Genoni, Paolo Giorda, Matteo G. A. Paris
Entanglement does not correspond to any observable and its evaluation always corresponds to an estimation procedure where the amount of entanglement is inferred from the measuremen…
Quantum estimation for quantum technology
Matteo G. A. Paris
Several quantities of interest in quantum information, including entanglement and purity, are nonlinear functions of the density matrix and cannot, even in principle, correspond to…
Properties of entangled photon pairs generated by a CW laser with small coherence time: theory and experiment
Simone Cialdi, Fabrizio Castelli, Matteo G. A. Paris
The generation of entangled photon pairs by parametric down--conversion from solid state CW lasers with small coherence time is theoretically and experimentally analyzed. We consid…
Squeezed vacuum as a universal quantum probe
Roberto Gaiba, Matteo G A Paris
We address local quantum estimation of bilinear Hamiltonians probed by Gaussian states. We evaluate the relevant quantum Fisher information (QFI) and derive the ultimate bound on p…