Remote Preparation of a Single-Mode Photonic Qubit by Measuring Field Quadrature Noise
С. А. Бабичев, B. Brezger, Alexander I. Lvovsky · Physical Review Letters · 2004
An electromagnetic field quadrature measurement, performed on one of the modes of the nonlocal single-photon state alpha|1,0>-beta|0,1>, collapses it into a superposition of the single-photon and vacuum states in the other mode. We use this effect to implement remote preparation of arbitrary single-mode photonic qubits conditioned on observation of a preselected quadrature value. The preparation efficiency of the resulting qubit can be higher than that of the initial single photon.