Resolution-enhanced entanglement detection
Authors: Gessner M., Pezze L., Smerzi A.
Autors Affiliation: CNR, INO, QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy; LENS, Largo Enrico Fermi 2, I-50125 Florence, Italy; Ist Nazl Ric Metrol, Str Cacce 91, I-10135 Turin, Italy
Abstract: We formulate a general family of entanglement criteria for multipartite states on arbitrary Hilbert spaces. Fisher information criteria compare the sensitivity to unitary rotations with the variances of suitable local observables. Generalized squeezing-type criteria provide lower bounds that are less stringent but require only measurements of second moments. The enhancement due to local access to the individual subsystems is studied in detail for the case of N spin-1/2 particles. The discussed techniques can be readily implemented in current experiments with trapped ions in Paul traps and neutral atoms in optical lattices.
Journal/Review: PHYSICAL REVIEW A
Volume: 95 (3) Pages from: 032326-1 to: 032326-12
KeyWords: QUANTUM-GAS MICROSCOPE; FERMI-HUBBARD MODEL; MANY-BODY SYSTEM; HYBRID ENTANGLEMENT; TRAPPED IONS; SPIN STATES; GENERATION; DYNAMICS; LIMIT; SPECTROSCOPYDOI: 10.1103/PhysRevA.95.032326Citations: 9data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2022-05-15References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here