2015/03/10 by Yoshiaki Tsujimoto, Yukihiro Sugiura, Makoto Ando +5
Computer Science · Physics and Astronomy · #Mechanical and Optical Resonators #Photon #Photon entanglement #Photon polarization #Polarization (electrochemistry) #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum entanglement #Quantum information science #Quantum teleportation #Spontaneous parametric down-conversion #quant-ph
paper · pdf · doi:10.1364/oe.23.013545
published as Optics Express Vol. 23, Issue 10, pp. 13545-13553 (2015) · 8 pages, 5 figures
arxiv created 2015/03/10 · openalex publication_date 2015/05/14 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We experimentally demonstrated entanglement extraction scheme by using photons at the telecommunication band for optical-fiber-based quantum communications. We generated two pairs of non-degenerate polarization entangled photons at 780 nm and 1551 nm by spontaneous parametric down-conversion and distributed the two photons at 1551 nm through a collective phase damping channel which gives the same amount of random phase shift on the two photons. Through local operation and classical communication, we extracted an entangled photon pair from two phase-disturbed photon pairs. An observed fidelity of the extracted photon pair to a maximally entangled photon pair was 0.73 ± 0.07 which clearly shows the recovery of entanglement.