Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Alessandro Toigo"'
Publikováno v:
New Journal of Physics, Vol 20, Iss 6, p 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 mutually
Externí odkaz:
https://doaj.org/article/95a2dcbdb70143f09f1f220ff2fd0e85
Publikováno v:
Entropy, Vol 19, Iss 7, p 301 (2017)
Heisenberg’s uncertainty principle has recently led to general measurement uncertainty relations for quantum systems: incompatible observables can be measured jointly or in sequence only with some unavoidable approximation, which can be quantified
Externí odkaz:
https://doaj.org/article/d34c7ef8fd1e48b5bb509883c0a65f6a
Publikováno v:
Mathematics, Vol 4, Iss 3, p 54 (2016)
We study the compatibility (or joint measurability) of quantum observables in a setting where the experimenter has access to multiple copies of a given quantum system, rather than performing the experiments on each individual copy separately. We intr
Externí odkaz:
https://doaj.org/article/53178572bdad480686c84b9d1371808d
Publikováno v:
Heinosaari, T, Reitzner, D & Toigo, A 2023, ' Anticipative measurements in hybrid quantum-classical computation ', Physical Review A, vol. 107, no. 3, 032612 . https://doi.org/10.1103/PhysRevA.107.032612
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bddc07197311448c558531547264d357
http://arxiv.org/abs/2209.05338
http://arxiv.org/abs/2209.05338
Autor:
Andrea Smirne, Simone Cialdi, Daniele Cipriani, Claudio Carmeli, Alessandro Toigo, Bassano Vacchini
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26b07704d2631a9595a60b848e86650a
https://hdl.handle.net/11311/1224709
https://hdl.handle.net/11311/1224709
Publikováno v:
Carmeli, C, Heinosaari, T & Toigo, A 2022, ' Quantum guessing games with posterior information ', Reports on Progress in Physics, vol. 85, no. 7, 074001 . https://doi.org/10.1088/1361-6633/ac6f0e
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee7919382a5b292852f78b299cc89c7a
https://hdl.handle.net/11567/1091655
https://hdl.handle.net/11567/1091655
Publikováno v:
Communications in Mathematical Physics. 357:1253-1304
We introduce a new information-theoretic formulation of quantum measurement uncertainty relations, based on the notion of relative entropy between measurement probabilities. In the case of a finite-dimensional system and for any approximate joint mea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24bced2b2fa9c31acccdbed4c4864150
https://doi.org/10.1007/s00220-017-3075-7
https://doi.org/10.1007/s00220-017-3075-7
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e11ac70303220c0a277dd1ed0559a37
http://arxiv.org/abs/1906.10904
http://arxiv.org/abs/1906.10904
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e6b4093b612ccec9fd8f057ae8b10cb
http://arxiv.org/abs/1904.11808
http://arxiv.org/abs/1904.11808
Publikováno v:
Physical Review Letters. 122
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::945684b332d4cd3c65f3428817d6b0d9
https://doi.org/10.1103/physrevlett.122.130402
https://doi.org/10.1103/physrevlett.122.130402