Preparation of arbitrary qutrit state based on biphotons

Details Preparation of arbitrary qutrit state based on biphotons Preparation of arbitrary qutrit state based on biphotons

2004-11-27

arxiv.org/abs/quant-ph/0411192v1

Physics

Quantum Physics

An extended version of our PRL paper. All calibration graphs and more comments added. Accepted for publication is Proc. of SPI

Scientific paper

10.1117/12.620494

The novel experimental realization of three-state optical quantum systems is presented. We use the polarization state of biphotons,propagating in single frequency- and spatial mode, to generate an arbitrary qutrits. In particular the specific sequence of states that are used in the extended version of BB84 quantum key distribution protocol was generated and tested. We experimentally verify the orthogonality of the 12 basic states and demonstrate the ability of switching between them. The tomography procedure is applied to reconstruct the density matrices of generated states.

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