Loschmidt echo for quantum metrology
Authors: Macri t., Smerzi A., Pezze L.
Autors Affiliation: 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
Journal/Review: PHYSICAL REVIEW A
Volume: 94 (1) Pages from: 010102-1 to: 010102-6
KeyWords: MULTIPARTICLE ENTANGLEMENT; FISHER INFORMATION; GENERATION; HUNDREDS; STATES; ATOMSDOI: 10.1103/PhysRevA.94.010102Citations: 59data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-17References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here