Remote preparation of a single-mode photonic qubit by measuring field quadrature noise.
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.
Babichev
S A
SA
Fachbereich Physik, Universität Konstanz, D-78457 Konstanz, Germany.
Brezger
B
B
Lvovsky
A I
AI