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Annals of Physics

Deterministic implementations of single-photon multi-qubit Deutsch–Jozsa algorithms with linear optics

Hai‐Rui Wei, Jizhen Liu

Published Jan 17, 2017• 5 citations
Publisher
DOI
10.1016/j.aop.2017.01.012

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We demonstrate a two-qubit Deutsch-Jozsa algorithm with single photons from a single InP quantum dot. The qubits are implemented via the spatial mode and the polarization of a single photon. Our photon source is operated both under continuous and pulsed excitation, the latter allowing deterministic quantum logic by generating photons on demand with a strong suppression of two-photon events. The computation reached a success probability of up to 79%. We also exploit the concept of decoherence-free subspaces that helps to make our experimental setup robust against sources of phase noise.