Kalasuwan, P. and Mendoza, G. and Laing, A. and Nagata, T. and Coggins, J. and Callaway, M. and Takeuchi, S. and Stefanov, A. and O’Brien, J. L. (2010) Simple scheme for expanding photonic cluster states for quantum information. Journal of the Optical Society of America B, 27 (6). A181-A184. ISSN 0740-3224 http://resolver.caltech.edu/CaltechAUTHORS:20100624-084131904
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We show how an entangled cluster state encoded in the polarization of single photons can be straightforwardly expanded by deterministically entangling additional qubits encoded in the path degree of freedom of the constituent photons. This can be achieved using a polarization–path controlled-phase gate. We experimentally demonstrate a practical and stable realization of this approach by using a Sagnac interferometer to entangle a path qubit and polarization qubit on a single photon. We demonstrate precise control over phase of the path qubit to change the measurement basis and experimentally demonstrate properties of measurement-based quantum computing using a two-photon, three-qubit cluster state.
|Additional Information:||© 2010 Optical Society of America. Received December 4, 2009; revised March 5, 2009; accepted March 26, 2009; posted April 13, 2010 (Doc. ID 120812); published May 24, 2010. We thank T. Rudolph, N. Yoran, and X.-Q. Zhou for helpful discussions. This work was supported by EPSRC, QIP IRC, IARPA, ERC, the Leverhulme Trust, and NSQI. J.L.O’B. acknowledges a Royal Society Wolfson Merit Award.|
|Classification Code:||OCIS codes: 270.5585, 200.3050, 270.0270.|
|Official Citation:||P. Kalasuwan, G. Mendoza, A. Laing, T. Nagata, J. Coggins, M. Callaway, S. Takeuchi, A. Stefanov, and J. L. O’Brien, "Simple scheme for expanding photonic cluster states for quantum information," J. Opt. Soc. Am. B 27, A181-A184 (2010) http://www.opticsinfobase.org/abstract.cfm?URI=josab-27-6-A181|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||02 Aug 2010 21:58|
|Last Modified:||26 Dec 2012 12:10|
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