30 citations · 109 across the 16 of their papers we have counts for
17 papers
Quantum random-number generator with non-demolition measurements: semi-device-independent implementation
Paolo Solinas, Giovanni Chesi
We propose and analyze a novel quantum random-number generator based on a tripartite quantum system in which two subsystems act as detectors. Within a quantum non-demolition measur…
Quantum Uncertainty and Entropy
Giovanni Chesi, Lorenzo Maccone
We review the plethora of uncertainty relations that appear in quantum mechanics and their nuances. We present both foundational applications, e.g. in understanding and defining co…
Experimental entropic uncertainty relations in dimensions three to five
Laura Serino, Giovanni Chesi, Benjamin Brecht +3
We provide experimental validation of tight entropic uncertainty relations for the Shannon entropies of observables with mutually unbiased eigenstates in high dimensions. In partic…
Bosonic two-stroke heat engines with polynomial nonlinear coupling
Giovanni Chesi, Chiara Macchiavello, Massimiliano Federico Sacchi
We study the thermodynamics of two-stroke heat engines where two bosonic modes and are coupled by the general nonlinear interaction $V_θ = \exp {(θa^{\dagger n}b^m -θ^* a^n…
High-dimensional quantum key distribution rates for multiple measurement bases
Nikolai Wyderka, Giovanni Chesi, Hermann Kampermann +2
We investigate the advantages of high-dimensional encoding for a quantum key distribution protocol. In particular, we address a BBM92-like protocol where the dimension of the syste…
High-dimensional quantum key distribution with resource-efficient detection
Maciej Ogrodnik, Adam Widomski, Dagmar Bruß +7
While quantum key distribution (QKD) based on two-dimensional (qubit) encoding is a mature, field-tested technology, its performance is lacking for many cryptographic applications.…
Quantum Key Distribution with Basis-Dependent Detection Probability
Federico Grasselli, Giovanni Chesi, Nathan Walk +7
Quantum Key Distribution (QKD) is a promising technology for secure communication. Nevertheless, QKD is still treated with caution in certain contexts due to potential gaps between…
Complementarity-based complementarity: the choice of mutually unbiased observables shapes quantum uncertainty relations
Laura Serino, Giovanni Chesi, Benjamin Brecht +3
Quantum uncertainty relations impose fundamental limits on the joint knowledge that can be acquired from complementary observables: perfect knowledge of a quantum state in one basi…
Quantum second harmonic generation in terms of elementary processes
Giovanni Chesi
We address the quantum dynamics of second harmonic generation with a perturbative approach. By inspecting the Taylor expansion of the unitary evolution, we identify the subsequent…
Work Fluctuations in Ergotropic Heat Engines
Giovanni Chesi, Chiara Macchiavello, Massimiliano Federico Sacchi
We study the work fluctuations in ergotropic heat engines, namely two-strokes quantum Otto engines where the work stroke is designed to extract the ergotropy (the maximum amount of…
A protocol for global multiphase estimation
Giovanni Chesi, Roberto Rubboli, Alberto Riccardi +2
Global estimation strategies allow to extract information on a phase or a set of phases without any prior knowledge, which is, instead, required for local estimation strategies. We…
Construction of efficient Schmidt number witnesses for high-dimensional quantum states
Nikolai Wyderka, Giovanni Chesi, Hermann Kampermann +2
Recent progress in quantum optics has led to setups that are able to prepare high-dimensional quantum states for quantum information processing tasks. As such, it is of importance…
Tight bounds from multiple-observable entropic uncertainty relations
Alberto Riccardi, Giovanni Chesi, Chiara Macchiavello +1
We investigate the additivity properties for both bipartite and multipartite systems by using entropic uncertainty relations (EUR) defined in terms of the joint Shannon entropy of…
Autocorrelation functions: a useful tool for both state and detector characterisation
Giovanni Chesi, Alessia Allevi, Maria Bondani
The calculation of autocorrelation functions represents a routinely used tool to characterise quantum states of light. In this paper, we evaluate the function for detecte…
Optimizing Silicon photomultipliers for Quantum Optics
Giovanni Chesi, Luca Malinverno, Alessia Allevi +4
Silicon Photomultipliers are potentially ideal detectors for Quantum Optics and Quantum Information studies based on mesoscopic states of light. However, their non-idealities hampe…
Measuring nonclassicality with Silicon photomultipliers
Giovanni Chesi, Luca Malinverno, Alessia Allevi +3
Detector stochastic deviations from an ideal response can hamper the measurement of quantum properties of light especially in the mesoscopic regime where photon-number resolution i…
Squeezing-enhanced phase-shift-keyed binary communication in noisy channels
Giovanni Chesi, Stefano Olivares, Matteo G. A. Paris
We address binary phase-shift-keyed communication channels based on Gaussian states and prove that squeezing improves state discrimination at fixed energy of the channel, also in t…