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Photonic Quantum Computing

Universal multiport interferometers for post-selected multi-photon gates

arXiv
Authors: Alessio Baldazzi, Lorenzo Pavesi

Year

2024

Paper ID

64562

Status

Preprint

Abstract Read

~2 min

Abstract Words

95

Citations

N/A

Abstract

We show how to use universal multiport interferometers' schemes in order to create photonic post-selected Controlled-Z and Controlled-Controlled-Z gates, which are equivalent, modulo single-qubit gates, to Controlled-NOT and Toffoli gates, respectively. The new proposed method is based on the following ingredients: identical single photons, Mach-Zehnder interferometer networks, single-photon detectors and post-selection. In particular, by using dual-rail path encoding together with auxiliary paths and single photons, we improve the success probabilities of such gates. This result further proves the complexity and richness of Reck and Clements schemes beyond the usual notions and practices of Boson Sampling.

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  • This paper contributes to the Photonic Quantum Computing research area in the Quantum Articles archive.
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  • We show how to use universal multiport interferometers' schemes in order to create photonic post-selected Controlled-Z and Controlled-Controlled-Z gates, which are equivalent...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2408.02832 [2] arXiv https://arxiv.org/abs/2408.02832 [3] Publisher https://arxiv.org/abs/2408.02832

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