Remote preparation of a single-mode photonic qubit by measuring field quadrature noise
Abstract
An electromagnetic field quadrature measurement, performed on one of the modes of the nonlocal single-photon state a|1,0>-b|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 quantum efficiency of the prepared qubit can be higher than that of the initial single photon.
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