title: Measurement-Induced Macroscopic Superposition States in Cavity Optomechanics.
abstract: A novel protocol for generating quantum superpositions of macroscopically distinct states of a bulk mechanical oscillator is proposed, compatible with existing optomechanical devices operating in the bad-cavity limit. By combining a pulsed optomechanical quantum nondemolition (QND) interaction with nonclassical optical resources and measurement-induced feedback, the need for strong single-photon coupling is avoided. We outline a three-pulse sequence of QND interactions encompassing squeezing-enhanced cooling by measurement, state preparation, and tomography.
authors.affiliation: Department of Physics, Technical University of Denmark, Building 309, 2800 Kongens Lyngby, Denmark.|Australian Research Council Centre of Excellence for Engineered Quantum Systems (EQuS), School of Mathematics and Physics, The University of Queensland, St. Lucia QLD 4072, Australia.
authors.forename: Ulrich B
authors.initials: UB
authors.lastname: Hoff
authors.affiliation: Department of Physics, Technical University of Denmark, Building 309, 2800 Kongens Lyngby, Denmark.
authors.forename: Johann
authors.initials: J
authors.lastname: Kollath-Bönig
authors.affiliation: Department of Physics, Technical University of Denmark, Building 309, 2800 Kongens Lyngby, Denmark.
authors.forename: Jonas S
authors.initials: JS
authors.lastname: Neergaard-Nielsen
authors.affiliation: Department of Physics, Technical University of Denmark, Building 309, 2800 Kongens Lyngby, Denmark.
authors.forename: Ulrik L
authors.initials: UL
authors.lastname: Andersen