2015/10/31 by Vladyslav C. Usenko, Laszlo Ruppert, Radim Filip · 12 citations
Computer Science · Physics and Astronomy · #Homodyne detection #Multi-mode optical fiber #Nonclassical light #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum imaging #Quantum key distribution #Quantum metrology #Quantum noise #Quantum optics and atomic interactions #Quantum sensor #quant-ph
paper · pdf · open access · doi:10.1364/oe.23.031534
published in Optics Express 23(24), 31534 (Optica Publishing Group) · 10 pages, 4 figures
openalex publication_date 2015/11/24 · arxiv created 2015/11/26 · arxiv updated 2015/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We analyze homodyne detection of macroscopically bright multimode nonclassical states of light and propose their application in quantum communication. We observe that the homodyne detection is sensitive to a mode-matching of the bright light to the highly intense local oscillator. Unmatched bright modes of light result in additional noise which technically limits detection of Gaussian entanglement at macroscopic level. When the mode-matching is sufficient, we show that multimode quantum key distribution with bright beams is feasible. It finally merges the quantum communication with classical optical technology of visible beams of light.