Sub shot-noise interferometric phase sensitivity with beryllium ions Schrodinger cat states
Anno: 2007
Autori: Pezzé L., Smerzi A.
Affiliazione autori: CNR-INFM BEC Center and Dipartimento di Fisica – Università di Trento, I-38050 Povo, Italy
Abstract: Interferometry with NOON quantum states can provide unbiased phase estimation with a sensitivity scaling as Delta theta similar to 1/ N(T) given a prior knowledge that the true phase shift theta lies in the interval -pi <= theta <= pi. The protocol requires a total of N(T) = 2(p) - 1 particles ( unequally) distributed among p independent measurements and overcomes basic difficulties present in previously proposed approaches. We demonstrate the possibility to obtain a phase sensitivity beating the classical shot-noise limit using published probabilities retrieved experimentally for the creation of Schrodinger cat quantum states containing up to N = 6 beryllium ions. Copyright (C) EPLA, 2007. Giornale/Rivista: EPL
Volume: 78 (3) Da Pagina: 30004 A: 30004
Parole chiavi: interferometry; heisenberg limit; DOI: 10.1209/0295-5075/78/30004Citazioni: 28dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-14Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui