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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 23 — Nov. 7, 2011
  • pp: 22723–22730

A high-speed tunable beam splitter for feed-forward photonic quantum information processing

Xiao-song Ma, Stefan Zotter, Nuray Tetik, Angie Qarry, Thomas Jennewein, and Anton Zeilinger  »View Author Affiliations

Optics Express, Vol. 19, Issue 23, pp. 22723-22730 (2011)

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We realize quantum gates for path qubits with a high-speed, polarization-independent and tunable beam splitter. Two electro-optical modulators act in a Mach-Zehnder interferometer as high-speed phase shifters and rapidly tune its splitting ratio. We test its performance with heralded single photons, observing a polarization-independent interference contrast above 95%. The switching time is about 5.6 ns, and a maximal repetition rate is 2.5 MHz. We demonstrate tunable feed-forward operations of a single-qubit gate of path-encoded qubits and a two-qubit gate via measurement-induced interaction between two photons.

© 2011 OSA

OCIS Codes
(230.0230) Optical devices : Optical devices
(270.0270) Quantum optics : Quantum optics

ToC Category:
Quantum Optics

Original Manuscript: August 8, 2011
Revised Manuscript: September 8, 2011
Manuscript Accepted: September 8, 2011
Published: October 26, 2011

Xiao-song Ma, Stefan Zotter, Nuray Tetik, Angie Qarry, Thomas Jennewein, and Anton Zeilinger, "A high-speed tunable beam splitter for feed-forward photonic quantum information processing," Opt. Express 19, 22723-22730 (2011)

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