Quantum Feedback Control for Deterministic Entangled Photon Generation
Masahiro Yanagisawa · Physical Review Letters · 2006
We present quantum feedback control for deterministic entanglement generation at the single-photon level. The protocol of controlling both total photon number and phase difference is based on the cascade structure of cavities placed in an optical closed loop, quantum nondemolition measurement with cross-Kerr interactions, and Lyapunov stability for feedback design.