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Conference on Lasers and Electro-Optics

Heralded Quantum Random Access Memory in a Scalable Photonic Integrated Circuit Platform

Kevin C. Chen, Wenhan Dai, Carlos Errando-Herranz, Seth Lloyd, Dirk Englund

Published Jan 1, 2021• 1 citation
Publisher

Abstract

We propose a scalable photonic integrated circuit implementation of a heralded quantum random access memory and analyze its theoretical operation fidelity and efficiency.
DOI
10.1364/cleo_qels.2021.fth1p.7

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This paper proposes a hybrid Quantum Random Access Memory (QRAM) architecture comprised of a silicon based photonic integrated circuit (PIC) platform coupled with SiC spin memories. The materials foundation of this work focuses on the physical realization of the architecture through heterogeneous integration of SiC color centres as memory onto Si based photonic waveguides. It discusses the fabrication routes, coupling efficiencies, loss minimization, and coherence preservation necessary for the reliable operation of large scale QRAMs, supported by quantitative performance estimates derived from Chen et al.’s analytical fidelity model. With a carefully designed, analysed and novel architecture for a QRAM, the contributions outlined in this paper propose a roadmap towards a scalable, photonic spin hybrid QRAM that should be compatible for manufacturing with the existing/near-term foundries and then extensible into modular and distributed quantum computing systems.