Abstract

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.

Date

January 1, 1970

Authors

Mark M Wilde, Federico Spedalieri, Jonathan P Dowling, Hwang Lee

Journal

International Journal of Quantum Information

Volume

5

Issue

04

Pages

617-626

Publisher

World Scientific Publishing Company