Manipulating biphotonic qutrits

B. P. Lanyon, T. J. Weinhold, N. K. Langford, J. L. O'Brien, K. J. Resch, A. Gilchrist, A. G. White

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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.

Original languageEnglish
Article number060504
Pages (from-to)1-4
Number of pages4
JournalPhysical Review Letters
Issue number6
Publication statusPublished - 14 Feb 2008
Externally publishedYes


Cite this

Lanyon, B. P., Weinhold, T. J., Langford, N. K., O'Brien, J. L., Resch, K. J., Gilchrist, A., & White, A. G. (2008). Manipulating biphotonic qutrits. Physical Review Letters, 100(6), 1-4. [060504].