The heralded amplification for the single-photon multi-mode W state of the time-bin qubit
Lan Zhou, Yu‐Bo Sheng · arXiv (Cornell University) · 2016
We put forward an effective amplification protocol for protecting the single-photon multi-mode W state of the time-bin qubit. The protocol only relies on linear optical elements, such as the $50:50$ beam splitters, variable beam splitters with the transmission of $t$ and the polarizing beam splitters. Only one pair of the single-photon multi-mode W state and some auxiliary single photons are required, and the fidelity of the single-photon multi-mode W state can be increased under $t