2003/06/13 by Robert M. Gingrich, Pieter Kok, Hwang Lee +2
Computer Science · Engineering · Physics and Astronomy · #Computer science #Encoding (memory) #Optical Network Technologies #Optics #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum channel #Quantum entanglement #Quantum error correction #Quantum information #Quantum information science #Quantum mechanics #Quantum network #Quantum optics and atomic interactions #Qubit #Repeater (horology) #quant-ph
paper · pdf · doi:10.1103/physrevlett.91.217901
published as Phys. Rev. Lett. 91, 217901 (2003) · 4 pages, 5 figures
arxiv created 2003/06/13 · openalex publication_date 2003/11/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
When photons are sent through a fiber as part of a quantum communication protocol, the error that is most difficult to correct is photon loss. Here we propose and analyze a two-to-four qubit encoding scheme, which can recover the loss of one qubit in the transmission. This device acts as a repeater, when it is placed in series to cover a distance larger than the attenuation length of the fiber, and it acts as an optical quantum memory, when it is inserted in a fiber loop. We call this dual-purpose device a "quantum transponder."