Protecting single-photon entangled state from photon loss with noiseless linear amplification
ShengLi Zhang, Song Yang, Xu‐Bo Zou, Bao‐Sen Shi, Guang‐Can Guo · Physical Review A · 2012
Single-photon entanglement provides a valuable resource for quantum communication and quantum repeaters. However, single-photon entanglement is sensitive to photon loss. In this Brief Report, we show that a noiseless linear amplifier is an efficient tool for protecting single-photon entanglement. The performance of ideal noiseless linear amplification as well as the nonideal amplification with on-off detectors and heralded single photons are also investigated.