Simple scheme for expanding photonic cluster states for quantum information
Abstract
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.Attached Files
Published - Kalasuwan2010p10439J_Opt_Soc_Am_B.pdf
Files
Kalasuwan2010p10439J_Opt_Soc_Am_B.pdf
Additional details
Identifiers
- Eprint ID
- 18788
- Resolver ID
- CaltechAUTHORS:20100624-084131904
Funding
- Engineering and Physical Sciences Research Council (EPSRC)
- Quantum Information Processing Interdisciplinary Research Collaboration (QIP IRC)
- Intelligence Advanced Research Projects Activity (IARPA)
- European Research Council (ERC)
- Leverhulme Trust
- Nanoscience and Quantum Information University of Bristol (NSQI)
- Royal Society
Dates
- Created
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2010-08-02Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field