Manipulating biphotonic qutrits.
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.
Lanyon
B P
BP
Department of Physics and Centre for Quantum Computer Technology, University of Queensland, Brisbane, Australia.
Weinhold
T J
TJ
Langford
N K
NK
O'Brien
J L
JL
Resch
K J
KJ
Gilchrist
A
A
White
A G
AG