Sensitivity Bounds for Multiparameter Quantum Metrology

Anno: 2018

Autori: Gessner M., Pezzè L., Smerzi A.

Affiliazione autori: CNR INO, QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy; LENS, Largo Enrico Fermi 2, I-50125 Florence, Italy.

Abstract: We identify precision limits for the simultaneous estimation of multiple parameters in multimode interferometers. Quantum strategies to enhance the multiparameter sensitivity are based on entanglement among particles, modes, or combining both. The maximum attainable sensitivity of particle-separable states defines the multiparameter shot-noise limit, which can be surpassed without mode entanglement. Further enhancements up to the multiparameter Heisenberg limit are possible by adding mode entanglement. Optimal strategies that saturate the precision bounds are provided.

Giornale/Rivista: PHYSICAL REVIEW LETTERS

Volume: 121 (13)      Da Pagina: 130503-1  A: 130503-7

Maggiori informazioni: M. G. acknowledges funding by the Alexander von Humboldt foundation. This work was supported by the European Commission through the QuantERA projects Q-Clocks and CEBBEC.
Parole chiavi: States; Clocks; Light
DOI: 10.1103/PhysRevLett.121.130503

Citazioni: 113
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-04-20
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