2005/10/31 by S. P. Walborn, D. S. Lemelle, M. P. Almeida +1 · 255 citations
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Byte #Computer network #Computer science #Computer security #Degrees of freedom (physics and chemistry) #Distribution (mathematics) #Information transmission #Key (lock) #Mathematical analysis #Mathematics #Photon #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum key distribution #Quantum mechanics #Statistical physics #Telecommunications #Theoretical computer science #Transmission (telecommunications) #quant-ph
paper · pdf · doi:10.1103/physrevlett.96.090501
published in Physical Review Letters 96(9), 090501 (American Physical Society) · 4 pages, 5 figures. Replaced with published version
openalex publication_date 2006/03/08 · arxiv created 2006/03/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a proof of principle demonstration of a quantum key distribution scheme in higher-order -dimensional alphabets using spatial degrees of freedom of photons. Our implementation allows for the transmission of 4.56 bits per sifted photon, while providing improved security: an intercept-resend attack on all photons would induce an average error rate of 0.47. Using our system, it should be possible to send more than a byte of information per sifted photon.