Fast and optimal generation of entanglement in bosonic Josephson junctions
Authors: Sorelli G., Gessner M., Smerzi A., Pezzè L.
Autors Affiliation: CNR, INO, QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy; LENS, Largo Enrico Fermi 2, I-50125 Florence, Italy; Albert Ludwigs Univ Freiburg, Phys Inst, Hermann Herder Str 3, D-79104 Freiburg, Germany; PSL Univ, CNRS, Ecole Normale Super, Dept Phys, 24 Rue Lhomond, F-75005 Paris, France
Abstract: We use an exact quantum phase model to study the dynamical generation of particle entanglement in a bosonic Josephson junction composed by two coupled and interacting Bose-Einstein condensates. Using analytical arguments, we show that linear coupling can accelerate the creation of entanglement with respect to the well-known one-axis twisting model where coupling is absent. Furthermore, with a numerical analysis of optimal control schemes, we identify the optimal parameters for the fast generation of metrologically useful entanglement on short timescales: the optimal evolution is generated for a specific ratio between the coupling and the interaction strength.
Journal/Review: PHYSICAL REVIEW A
Volume: 99 (2) Pages from: 022329-1 to: 022329-11
KeyWords: BOSE-EINSTEIN CONDENSATE; STATESDOI: 10.1103/PhysRevA.99.022329Citations: 6data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-10-25References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here