Manipulating Biphotonic Qutrits

B. P. Lanyon, T. J. Weinhold, N. K. Langford, J. L. O’Brien, K. J. Resch, A. Gilchrist, and A. G. White
Phys. Rev. Lett. 100, 060504 – Published 14 February 2008

Abstract

Quantum information carriers with higher dimension than the canonical qubit offer significant advantages. However, manipulating such systems is extremely difficult. We show how measurement-induced nonlinearities can dramatically extend the range of possible transforms on biphotonic qutrits—three-level quantum systems formed by the polarization of two photons in the same spatiotemporal mode. We fully characterize the biphoton-photon entanglement that underpins our technique, thereby realizing the first instance of qubit-qutrit entanglement. We discuss an extension of our technique to generate qutrit-qutrit entanglement and to manipulate any bosonic encoding of quantum information.

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  • Received 18 July 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.060504

©2008 American Physical Society

Authors & Affiliations

B. P. Lanyon1, T. J. Weinhold1, N. K. Langford1, J. L. O’Brien2, K. J. Resch3, A. Gilchrist1, and A. G. White1

  • 1Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane, Australia
  • 2Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol, United Kingdom
  • 3Institute for Quantum Computing and Department of Physics & Astronomy, University of Waterloo, Waterloo, Canada

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Vol. 100, Iss. 6 — 15 February 2008

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