Generation of hybrid entanglement between a single-photon polarization qubit and a coherent state

Hyukjoon Kwon, Hyunseok Jeong

Published 2014-10-24Version 1

We propose a scheme to generate entanglement between a single-photon qubit in the polarization basis and a coherent state of light. The required resources are a superposition of coherent states, a polarization entangled photon pair, beam splitters, the displacement operation, and four photodetectors. Even when realistic detectors with a limited efficiency are used, an arbitrarily high fidelity can be obtained by adjusting a beam-splitter ratio and the displacement amplitude at the price of reducing the success probability.