2006/10/31 by Mark M. Wilde, Federico Spedalieri, Federico M. Spedalieri +2
Computer Science · Physics and Astronomy · #Neural Networks and Reservoir Computing #Quantum Information and Cryptography #Quantum optics and atomic interactions #quant-ph
paper · pdf · doi:10.1142/s0219749907003080
published as International Journal of Quantum Information, Vol. 5, No. 4 (2007) pp. 617-626 · 10 pages, 4 figures, 4 tables; made significant revisions and changed format
arxiv created 2007/05/22 · openalex publication_date 2007/08/01 · arxiv updated 2009/12/01 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/01
We design a controlled-phase gate for linear optical quantum computing by using photodetectors that cannot resolve photon number. An intrinsic error-correction circuit corrects errors introduced by the detectors. Our controlled-phase gate has a 1/4 success probability. Recent development in cluster-state quantum computing has shown that a two-qubit gate with non-zero success probability can build an arbitrarily large cluster state only with polynomial overhead. Hence, it is possible to generate optical cluster states without number-resolving detectors and with polynomial overhead.