Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Francesco Albarelli"'
Publikováno v:
Physical Review X, Vol 12, Iss 1, p 011039 (2022)
We derive fundamental bounds on the maximal achievable precision in multiparameter noisy quantum metrology, valid under the most general entanglement-assisted adaptive strategy, which are tighter than the bounds obtained by a direct use of single-par
Externí odkaz:
https://doaj.org/article/e79a5c64854f43f8938962e61574da0a
Publikováno v:
Physical Review X, Vol 10, Iss 3, p 031023 (2020)
In the study of quantum limits to parameter estimation, the high dimensionality of the density operator and that of the unknown parameters have long been two of the most difficult challenges. Here, we propose a theory of quantum semiparametric estima
Externí odkaz:
https://doaj.org/article/b3a94c923557494eac2c617204bf8272
Publikováno v:
Quantum, Vol 2, p 110 (2018)
We study quantum frequency estimation for $N$ qubits subjected to independent Markovian noise, via strategies based on time-continuous monitoring of the environment. Both physical intuition and an extended convexity property of the quantum Fisher inf
Externí odkaz:
https://doaj.org/article/24b7c6c325834b75859e8f10886a8698
Publikováno v:
New Journal of Physics, Vol 19, Iss 12, p 123011 (2017)
We address the estimation of the magnetic field B acting on an ensemble of atoms with total spin J subjected to collective transverse noise. By preparing an initial spin coherent state, for any measurement performed after the evolution, the mean-squa
Externí odkaz:
https://doaj.org/article/84629ae5373343b9b1a110480a9c4da5
Autor:
Francesco Albarelli, Mateusz Mazelanik, Michał Lipka, Alexander Streltsov, Michał Parniak, Rafał Demkowicz-Dobrzański
Publikováno v:
Albarelli, F, Mazelanik, M, Lipka, M, Streltsov, A, Parniak, M & Demkowicz-Dobrzanski, R 2022, ' Quantum Asymmetry and Noisy Multimode Interferometry ', Physical Review Letters, vol. 128, no. 24, 240504 . https://doi.org/10.1103/PhysRevLett.128.240504
Quantum asymmetry is a physical resource which coincides with the amount of coherence between the eigenspaces of a generator responsible for phase encoding in interferometric experiments. We highlight an apparently counter-intuitive behavior that the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b188d8667a2fd52b22379907c3c78890
https://doi.org/10.1103/physrevlett.128.240504
https://doi.org/10.1103/physrevlett.128.240504
Publikováno v:
Quantum 2.0 Conference and Exhibition.
We derive fundamental bounds on the maximal achievable precision in multiparameter noisy quantum channel estimation, as well as show operationally meaningful Heisenberg scaling precision limits for the multiple phase interferometry in the absence of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa013483784ba87546f105f609700495
https://doi.org/10.1364/quantum.2022.qw4c.6
https://doi.org/10.1364/quantum.2022.qw4c.6
Publikováno v:
Quantum Information and Measurement VI 2021.
We derive fundamental bounds on the maximal achievable precision in multi-parameter noisy quantum channel estimation, valid under the most general entanglement-assisted adaptive strategy, which are tighter than the bounds obtained by a direct use of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aed84f6c84eb639985532d20b224b388
https://doi.org/10.1364/qim.2021.w2a.1
https://doi.org/10.1364/qim.2021.w2a.1
We derive fundamental bounds on the maximal achievable precision in multiparameter noisy quantum metrology, valid under the most general entanglement-assisted adaptive strategy, which are tighter than the bounds obtained by a direct use of single-par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8dc802c6301547e8cfbb832c706b6904
Autor:
Ilaria Gianani, Marco Barbieri, Adriano verna, Rafał Demkowicz-Dobrzański, Francesco Albarelli, Valeria Cimini
Publikováno v:
Optica
Phase measurements are of paramount importance in quantum optical sensing. However, the promise of a quantum advantage, the celebrated Heisenberg scaling, is severely curtailed in the presence of noise and loss. Here we investigate systems in which p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f24cea6bddc955b70c8eb7dd103e14a