title: Non-Gaussian state generation from linear elements via feedback.
abstract: We present a feedback scheme to produce quantum non-Gaussian states from linear optical elements. Instead of traditional additive control methods, we introduce a mutiplicative feedback control and apply it to the deterministic generation of quantum superposition states. The protocol of feedback control is based on quantum nondemolition measurement of a quadrature, multifeedback structure, and Lyapunov stability for feedback design.
authors.affiliation: Department of Engineering, The Australian National University, Canberra ACT 0200, Australia.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yanagisawa