Loschmidt echo for quantum metrology
Anno: 2016
Autori: Macri t., Smerzi A., Pezze L.
Affiliazione autori: Univ Fed Rio Grande do Norte, Dept Fis Teor & Expt, Natal, RN, Brazil; Int Inst Phys, Natal, RN, Brazil; INO CNR, QSTAR, Largo Enrico Fermi 6, I-50125 Florence, Italy; LENS, Largo Enrico Fermi 6, I-50125 Florence, Italy
Abstract: We propose a versatile Loschmidt echo protocol to detect and quantify multiparticle entanglement. It allows us to extract the quantum Fisher information for arbitrary pure states, and finds direct application in quantum metrology. In particular, the protocol applies to states that are generally difficult to characterize, as non-Gaussian states, and states that are not symmetric under particle exchange. We focus on atomic systems, including trapped ions, polar molecules, and Rydberg atoms, where entanglement is generated dynamically via long-range interaction, and show that the protocol is stable against experimental detection errors
Giornale/Rivista: PHYSICAL REVIEW A
Volume: 94 (1) Da Pagina: 010102-1 A: 010102-6
Parole chiavi: MULTIPARTICLE ENTANGLEMENT; FISHER INFORMATION; GENERATION; HUNDREDS; STATES; ATOMSDOI: 10.1103/PhysRevA.94.010102Citazioni: 100dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-05Riferimenti 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