134 citations · 316 across the 15 of their papers we have counts for
15 papers
Spectral evolution of two-photon emission in microresonators
Francesca Famà, Stefano Dello Russo, Stefano Giaccari +14
High-Q silicon nitride microresonators are versatile sources for generating photon pairs via four-wave mixing. We investigate the spectral coherence of this process, tracking the t…
Universal Protection of Quantum States from Decoherence
Francesco Atzori, Salvatore Virzì, Francesco Devecchi +6
The fragility of quantum coherence fundamentally limits the scalability of quantum technologies, as unavoidable environmental interactions induce decoherence and rapidly degrade qu…
Experimental Test of Nonlocality Limits from Relativistic Independence
Francesco Atzori, Salvatore Virzì, Enrico Rebufello +9
Quantum correlations, like entanglement, represent the characteristic trait of quantum mechanics, and pose essential issues and challenges to the interpretation of this pillar of m…
QKD protected fiber-based infrastructure for time dissemination
Alice Meda, Alberto Mura, Salvatore Virzì +10
In this study, we demonstrate the possibility to protect, with Quantum Key Distribution (QKD), a critical infrastructure as the fiber-based one used for time and frequency (TF) dis…
Detection Efficiency Characterization for Free-Space Single-Photon Detectors: Measurement Facility and Wavelength-Dependence Investigation
Salvatore Virzì, Alice Meda, Elisa Redolfi +4
In this paper, we present a new experimental apparatus for the measurement of the detection efficiency of free-space single-photon detectors based on the substitution method. For t…
Phase Noise in Real-World Twin-Field Quantum Key Distribution
Gianluca Bertaina, Cecilia Clivati, Simone Donadello +9
The impact of noise sources in real-world implementations of Twin-Field Quantum Key Distribution (TF-QKD) protocols is investigated, focusing on phase noise from photon sources and…
Efficient activation of telecom emitters in silicon upon ns pulsed laser annealing
G. Andrini, G. Zanelli, S. Ditalia Tchernij +11
The recent demonstration of optically active telecom emitters makes silicon a compelling candidate for solid state quantum photonic platforms. Particularly fabrication of the G cen…
Single-pair measurement of the Bell parameter
Salvatore Virzì, Enrico Rebufello, Francesco Atzori +10
Bell inequalities are one of the cornerstones of quantum foundations, and fundamental tools for quantum technologies. Recently, the scientific community worldwide has put a lot of…
Sensing microscopic noise events by frequent quantum measurements
Salvatore Virzì, Laura T. Knoll, Alessio Avella +8
We propose and experimentally demonstrate a general method allowing us to unravel microscopic noise events that affect a continuous quantum variable. Such unraveling is achieved by…
Quantum Zeno and Anti-Zeno probes of noise correlations in photon polarisation
Salvatore Virzi', Alessio Avella, Fabrizio Piacentini +8
We experimentally demonstrate, for the first time, noise diagnostics by repeated quantum measurements. Specifically, we establish the ability of a single photon, subjected to rando…
Temporal teleportation with pseudo-density operators: how dynamics emerges from temporal entanglement
Chiara Marletto, Vlatko Vedral, Salvatore Virzì +5
We show that, by utilising temporal quantum correlations as expressed by pseudo-density operators (PDOs), it is possible to recover formally the standard quantum dynamical evolutio…
Coherent phase transfer for real-world twin-field quantum key distribution
Cecilia Clivati, Alice Meda, Simone Donadello +10
Quantum mechanics allows the distribution of intrinsically secure encryption keys by optical means. Twin-field quantum key distribution is the most promising technique for its impl…
Non-monogamy of spatio-temporal correlations and the black hole information loss paradox
C. Marletto, V. Vedral, S. Virzì +6
Pseudo-density matrices are a generalisation of quantum states and do not obey monogamy of quantum correlations. Could this be the solution to the paradox of information loss durin…
Theoretical description and experimental simulation of quantum entanglement near open time-like curves via pseudo-density operators
C. Marletto, V. Vedral, S. Virzì +6
Closed timelike curves are striking predictions of general relativity allowing for time-travel. They are afflicted by notorious causality issues (e.g. grandfather's paradox). Quant…
Optimal estimation of entanglement and discord in two-qubit states
Salvatore Virzí, Enrico Rebufello, Alessio Avella +5
Recently, the fast development of quantum technologies led to the need for tools allowing the characterization of quantum resources. In particular, the ability to estimate non-clas…