3.9k citations · 28.3k across the 275 of their papers we have counts for
12 papers · 2 filters
High-fidelity quantum driving
Mark G. Bason, Matthieu Viteau, Nicola Malossi +7
The ability to accurately control a quantum system is a fundamental requirement in many areas of modern science such as quantum information processing and the coherent manipulation…
Quantum measurement bounds beyond the uncertainty relations
Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone
We give a bound to the precision in the estimation of a parameter in terms of the expectation value of an observable. It is an extension of the Cramer-Rao inequality and of the Hei…
Local-channel-induced rise of quantum correlations in continuous-variable systems
Francesco Ciccarello, Vittorio Giovannetti
It was recently discovered that the quantum correlations of a pair of disentangled qubits, as measured by the quantum discord, can increase solely because of their interaction with…
A reply to "Problems with modelling closed timelike curves as post-selected teleportation"
Seth Lloyd, Lorenzo Maccone, Raul Garcia-Patron +8
In arXiv:1107.4675 Ralph uses our post-selection model of closed timelike curves (P-CTC) to construct an "unproven-theorem" paradox, and claims that this voids our argument that P-…
Phase estimation via quantum interferometry for noisy detectors
Nicoló Spagnolo, Chiara Vitelli, Vito Giovanni Lucivero +3
The sensitivity in optical interferometry is strongly affected by losses during the signal propagation or at the detection stage. The optimal quantum states of the probing signals…
Statistical distribution of the local purity in a large quantum system
A. De Pasquale, P. Facchi, V. Giovannetti +3
The local purity of large many-body quantum systems can be studied by following a statistical mechanical approach based on a random matrix model. Restricting the analysis to the ca…
Creating quantum correlations through local non-unitary memoryless channels
Francesco Ciccarello, Vittorio Giovannetti
We show that two qubits, initially in a fully classical state, can develop significant quantum correlations as measured by the quantum discord (QD) under the action of a local memo…
Quantitative entanglement witnesses of Isotropic- and Werner-class via local measurements
Pietro Silvi, Fabio Taddei, Rosario Fazio +1
Quantitative entanglement witnesses allow one to bound the entanglement present in a system by acquiring a single expectation value. In this paper we analyze a special class of suc…
The Kirchhoff's Matrix-Tree Theorem revisited: counting spanning trees with the quantum relative entropy
Vittorio Giovannetti, Simone Severini
By revisiting the Kirchhoff's Matrix-Tree Theorem, we give an exact formula for the number of spanning trees of a graph in terms of the quantum relative entropy between the maximal…
Advances in Quantum Metrology
Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone
In classical estimation theory, the central limit theorem implies that the statistical error in a measurement outcome can be reduced by an amount proportional to n^(-1/2) by repeat…
Stiffness in 1D Matrix Product States with periodic boundary conditions
Davide Rossini, Vittorio Giovannetti, Rosario Fazio
We discuss in details a modified variational matrix-product-state algorithm for periodic boundary conditions, based on a recent work by P. Pippan, S.R. White and H.G. Everts, Phys.…
Enhanced Quantum Communication via Optical Refocusing
Cosmo Lupo, Vittorio Giovannetti, Stefano Pirandola +2
We consider the problem of quantum communication mediated by an optical refocusing system, which is schematized as a thin lens with a finite pupil. This model captures the basic fe…