Non-Gaussian state generation from linear elements via feedback.
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.
Yanagisawa
Masahiro
M
Department of Engineering, The Australian National University, Canberra ACT 0200, Australia.