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arXiv · 0810.0336

Efficient photon sorter in a high-dimensional Hilbert space

Warner A. Miller
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Abstract

An increase in the dimension of state space for quantum key distribution (QKD) can decrease its fidelity requirements while also increasing its bandwidth. A significant obstacle for QKD with qudits (d>2) has been an efficient and practical quantum state sorter for photons whose complex fields are modulated in both amplitude and phase. We propose such a sorter based on a multiplexed thick hologram, constructed e.g. from photo-thermal refractive (PTR) glass. We validate this approach using coupled-mode theory with parameters consistent with PTR glass to simulate a holographic sorter. The model assumes a three-dimensional state space spanned by three tilted planewaves. The utility of such a sorter for broader quantum information processing applications can be substantial.

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Warner A. Miller. 2011-01-18. Efficient photon sorter in a high-dimensional Hilbert space. https://arxiv.org/abs/0810.0336

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