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Demonstration of an Optical Quantum Controlled-NOT Gate without Path Interference

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Title: Demonstration of an Optical Quantum Controlled-NOT Gate without Path Interference
Authors: Okamoto, Ryo Browse this author
Hofmann, Holger F. Browse this author
Takeuchi, Shigeki Browse this author
Sasaki, Keiji Browse this author
Issue Date: 18-Nov-2005
Publisher: American Physical Society
Journal Title: Physical Review Letters
Volume: 95
Start Page: 210506
Publisher DOI: 10.1103/PhysRevLett.95.210506
Abstract: We report the first experimental demonstration of an optical quantum controlled-NOT gate without any path interference, where the two interacting path interferometers of the original proposals [Phys. Rev. A 66, 024308 (2002); 65, 062324 (2002)] have been replaced by three partially polarizing beam splitters with suitable polarization dependent transmittances and reflectances. The performance of the device is evaluated using a recently proposed method [Phys. Rev. Lett. 94, 160504 (2005)], by which the quantum process fidelity and the entanglement capability can be estimated from the 32 measurement results of two classical truth tables, significantly less than the 256 measurement results required for full quantum tomography.
Rights: Copyright © 2005 American Physical Society
Relation URI: http://www.aps.org/
Type: article
URI: http://hdl.handle.net/2115/5550
Appears in Collections:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 竹内 繁樹

 

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