KIP publications

year 2023
author(s) Sund P I, Lomonte E, Paesani S, Wang Y, Carolan J, Bart N, Wieck A D, Ludwig A, Midolo L, Pernice W H P, Lodahl P, Lenzini F
title High-speed thin-film lithium niobate quantum processor driven by a solid-state quantum emitter
KIP-Nummer HD-KIP 23-32
KIP-Gruppe(n) F31
document type Paper
source Sci. Adv. vol. 9, issue 19, eadg7268
doi 10.1126/sciadv.adg7268
Abstract (en)

Scalable photonic quantum computing architectures pose stringent requirements on photonic processing devices. The needs for low-loss high-speed reconfigurable circuits and near-deterministic resource state generators are some of the most challenging requirements. Here, we develop an integrated photonic platform based on thin-film lithium niobate and interface it with deterministic solid-state single-photon sources based on quantum dots in nanophotonic waveguides. The generated photons are processed with low-loss circuits programmable at speeds of several gigahertz. We realize a variety of key photonic quantum information processing functionalities with the high-speed circuits, including on-chip quantum interference, photon demultiplexing, and reprogrammability of a four-mode universal photonic circuit. These results show a promising path forward for scalable photonic quantum technologies by merging integrated photonics with solid-state deterministic photon sources in a heterogeneous approach to scaling up.

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