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APS » Journals » Phys. Rev. Lett. » Volume 93 » Issue 2
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Phys. Rev. Lett. 93, 020504 (2004) [4 pages]

Realization of a Photonic Controlled-NOT Gate Sufficient for Quantum Computation

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Sara Gasparoni, Jian-Wei Pan*, Philip Walther, Terry Rudolph†, and Anton Zeilinger‡
Institut für Experimentalphysik, Universität Wien, Boltzmanngasse 5, 1090 Wien, Austria

Received 16 February 2004; published 9 July 2004

We report the first experimental demonstration of a quantum controlled-NOT gate for different photons, which is classically feed forwardable. In the experiment, we achieved this goal with only the use of linear optics, an entangled ancillary pair of photons, and postselection. The techniques developed in our experiment are of significant importance for quantum information processing with linear optics.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.020504
DOI:
10.1103/PhysRevLett.93.020504
PACS:
03.67.Lx, 03.65.Ud, 42.50.–p

*Present address: Physikalisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany.

†Present address: Imperial College, Blackett Labs, Prince Consort Road, London SW7 2AZ, U.K.

‡Also at Institut für Quantenoptik und Quanten­information, Österreichische Akademie der Wissenschaften, Vienna, Austria.

 
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