Optical quantum computing

JL O'Brien

Research output: Contribution to journalArticle (Academic Journal)peer-review

532 Citations (Scopus)


In 2001, all-optical quantum computing became feasible with the discovery that scalable quantum computing is possible using only single-photon sources, linear optical elements, and single-photon detectors. Although it was in principle scalable, the massive resource overhead made the scheme practically daunting. However, several simplifications were followed by proof-of-principle demonstrations, and recent approaches based on cluster states or error encoding have dramatically reduced this worrying resource overhead, making an all-optical architecture a serious contender for the ultimate goal of a large-scale quantum computer. Key challenges will be the realization of high-efficiency sources of indistinguishable single photons, low-loss, scalable optical circuits, high-efficiency single-photon detectors, and low-loss interfacing of these components.
Translated title of the contributionOptical quantum computing
Original languageEnglish
Pages (from-to)1567 - 1570
Number of pages4
Volume318 (5856)
Publication statusPublished - Dec 2007

Bibliographical note

Publisher: American Association for the Advancement of Science

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