2005/12/31 by Holger F. Hofmann, Holger F Hofmann, Toshiki Ide
Computer Science · Engineering · Physics and Astronomy · #Advanced Photonic Communication Systems #Amplitude #Beam (structure) #Beam splitter #Inverse #Optical field #Photon #Polarization (electrochemistry) #Quantum Information and Cryptography #Quantum optics and atomic interactions #Realization (probability) #quant-ph
paper · pdf · doi:10.1088/1367-2630/8/8/130
published as New J. Phys. 8 (2006) 130 · 10 pages, including 1 figure, extended from letter to full paper, to be published in New Journal of Physics
arxiv created 2006/07/31 · openalex publication_date 2006/08/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Light fields can be amplified by measuring the field amplitude reflected at a beam splitter of reflectivity R and adding a coherent amplitude proportional to the measurement result to the transmitted field. By applying the quantum optical realization of this amplification scheme to single-photon inputs, it is possible to clone the polarization states of photons. We show that optimal cloning of single-photon polarization is possible when the gain factor of the amplification is equal to .