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Abstract: Quantum information carriers with higher dimension than the canonical qubitoffer significant advantages. However, manipulating such systems is extremelydifficult. We show how measurement induced non-linearities can be employed todramatically extend the range of possible transforms on biphotonic qutrits; thethree level quantum systems formed by the polarisation of two photons in thesame spatio-temporal mode. We fully characterise the biphoton-photonentanglement that underpins our technique, thereby realising the first instanceof qubit-qutrit entanglement. We discuss an extension of our technique togenerate qutrit-qutrit entanglement and to manipulate any bosonic encoding ofquantum information.

Autor: 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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