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pro vyhledávání: '"Barbieri,Marco A"'
Autor:
Barbieri, Marco, Rekvényi, Kamilla
We give a simplified version of the proofs that, outside of their isolated vertices, the complement of the enhanced power graph and of the power graph are connected of diameter at most $3$.
Comment: 3 pages
Comment: 3 pages
Externí odkaz:
http://arxiv.org/abs/2411.05429
Quantum Sensing is a rapidly growing branch of research within the area of quantum science and technology offering key resources, beyond classical ones, with potential for commercialisation of novel (quantum) sensors. The exploitation of quantum reso
Externí odkaz:
http://arxiv.org/abs/2409.00833
Reliably characterised pulses are the starting point of any application of ultrafast techniques. Unfortunately, experimental constraints do not always allow optimising the characterisation conditions. This dictates the need for refined analysis metho
Externí odkaz:
http://arxiv.org/abs/2407.02976
Autor:
Bizzarri, Gabriele, Gherardini, Stefano, Manrique, Mylenne, Bruni, Fabio, Gianani, Ilaria, Barbieri, Marco
We show how quantum coherence governs the quasiprobability statistics of outcome pairs, consecutively recorded at two distinct times, using weak measurements. In doing this, we have realised weak-sequential measurement with photonic qubits, where the
Externí odkaz:
http://arxiv.org/abs/2406.06713
Autor:
Barbieri, Marco, Spiga, Pablo
Given a finite connected graph ${\Gamma}$ and a group $G$ acting transitively on the vertices of ${\Gamma}$, we prove that the number of vertices of ${\Gamma}$ and the cardinality of $G$ are bounded above by a function depending only on the cardinali
Externí odkaz:
http://arxiv.org/abs/2405.13603
Autor:
Barbieri, Marco, Sabatini, Luca
Fix $\varepsilon>0$. We say that a finite group $G$ is $\varepsilon$-quasirandom if every nontrivial irreducible complex representation of $G$ has degree at least $|G|^\varepsilon$. In this paper, we give a structure theorem for large $\varepsilon$-q
Externí odkaz:
http://arxiv.org/abs/2404.05550
Publikováno v:
New J. Phys. 26, 073016 (2024)
Accurate phase estimation in the presence of unknown phase diffusive noise is a crucial yet challenging task in noisy quantum metrology. This problem is particularly interesting due to the detrimental impact of the associated noise. Here, we investig
Externí odkaz:
http://arxiv.org/abs/2403.04722
Autor:
Barbieri, Marco, Spiga, Pablo
We find a lower bound on the proportion of derangements in a finite transitive group that depends on the minimal nontrivial subdegree. As a consequence, we prove that, if $\Gamma$ is a $G$-vertex-transitive digraph of valency $d\ge 1$, then the propo
Externí odkaz:
http://arxiv.org/abs/2402.05089
Autor:
Bizzarri, Gabriele, Gianani, Ilaria, Manrique, Mylenne, Berardi, Vincenzo, Capellini, Giovanni, Bruni, Fabio, Barbieri, Marco
Quantum steering captures the ability of one party, Alice, to control through quantum correlations the state at a distant location, Bob, with superior ability than allowed by a local hidden state model. Verifying the presence of quantum steering has
Externí odkaz:
http://arxiv.org/abs/2401.17431
Publikováno v:
Phys. Rev. A 110, 032436 (2024)
Noise affects the performance of quantum technologies, hence the importance of elaborating operative figures of merit that can capture its impact in exact terms. In quantum metrology, the introduction of the Fisher information measurement noise susce
Externí odkaz:
http://arxiv.org/abs/2312.02035