Phase sensitivity of a Mach-Zehnder interferometer
Anno: 2006
Autori: Pezzé L., Smerzi A.
Affiliazione autori: Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA; INFM, BEC, CRS, I-38050 Povo, Italy; Univ Trent, Dipartimento Fis, I-38050 Povo, Italy.
Abstract: The best performance of a Mach-Zehnder interferometer is achieved with the input state parallel to N-T/2+1 >parallel to N-T/2-1 >+parallel to N-T/2-1 >parallel to N-T/2+1 >, N-T being the total number of atoms or photons. This gives (i) a phase-shift error confidence C-68%=2.67/N-T with (ii) a single interferometric measurement. Different input quantum states can achieve the Heisenberg scaling similar to 1/N-T but with higher prefactors and at the price of a statistical analysis of two or more independent measurements.
Giornale/Rivista: PHYSICAL REVIEW A
Volume: 73 (1) Da Pagina: 11801-1 A: 11801-4
Parole chiavi: States; Limit; Entanglement; NoiseDOI: 10.1103/PhysRevA.73.011801Citazioni: 69dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-07-13Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
