Zobrazeno 1 - 10
of 130
pro vyhledávání: '"Toigo, Alessandro"'
Publikováno v:
Phys. Rev. A 107, 032612 (2023)
Before the availability of large scale fault-tolerant quantum devices, one has to find ways to make the most of current noisy intermediate-scale quantum devices. One possibility is to seek smaller repetitive hybrid quantum-classical tasks with higher
Externí odkaz:
http://arxiv.org/abs/2209.05338
Autor:
Smirne, Andrea, Cialdi, Simone, Cipriani, Daniele, Carmeli, Claudio, Toigo, Alessandro, Vacchini, Bassano
Publikováno v:
Quantum Sci. Technol. 7, 025016 (2022)
We describe and realize an experimental procedure for assessing the incompatibility of two qubit measurements. The experiment consists in a state discrimination task where either measurement is used according to some partial intermediate information.
Externí odkaz:
http://arxiv.org/abs/2112.08408
Publikováno v:
Reports on Progress in Physics 85 (2022) 074001
Quantum guessing games form a versatile framework for studying different tasks of information processing. A quantum guessing game with posterior information uses quantum systems to encode messages and classical communication to give partial informati
Externí odkaz:
http://arxiv.org/abs/2107.11873
Publikováno v:
EPL, 130 (2020) 50001
We prove that quantum random access code (QRAC) performs better than its classical counterpart only when incompatible quantum measurements are used in the decoding task. As a consequence, evaluating the average success probability for QRAC provides a
Externí odkaz:
http://arxiv.org/abs/1911.04360
Publikováno v:
Journal of Mathematical Physics 60, 122202 (2019)
We introduce the notion of incompatibility witness for quantum channels, defined as an affine functional that is non-negative on all pairs of compatible channels and strictly negative on some incompatible pair. This notion extends the recent definiti
Externí odkaz:
http://arxiv.org/abs/1906.10904
Publikováno v:
Foundations of Physics (2019) 49: 492--505
The relation between noise and disturbance is investigated within the general framework of Galois connections. Within this framework, we introduce the notion of leak of information, mathematically defined as one of the two closure maps arising from t
Externí odkaz:
http://arxiv.org/abs/1904.11808
We describe a particular class of pairs of quantum observables which are extremal in the convex set of all pairs of compatible quantum observables. The pairs in this class are constructed as uniformly noisy versions of two mutually unbiased bases (MU
Externí odkaz:
http://arxiv.org/abs/1904.09451
Publikováno v:
Phys. Rev. Lett. 122, 130402 (2019)
We demonstrate that quantum incompatibility can always be detected by means of a state discrimination task with partial intermediate information. This is done by showing that only incompatible measurements allow for an efficient use of premeasurement
Externí odkaz:
http://arxiv.org/abs/1812.02985
Publikováno v:
Phys. Rev. A 98, 012126 (2018)
We discuss the following variant of the standard minimum error state discrimination problem: Alice picks the state she sends to Bob among one of several disjoint state ensembles, and she communicates him the chosen ensemble only at a later time. Two
Externí odkaz:
http://arxiv.org/abs/1804.09693
Publikováno v:
New J. Phys. 20, 063038 (2018)
We characterize minimal measurement setups for validating the quantum coherence of an unknown quantum state. We show that for a $d$-level system, the optimal strategy consists of measuring $d$ orthonormal bases such that each measured basis is mutual
Externí odkaz:
http://arxiv.org/abs/1708.05597