Photonic quantum computing on thin-film lithium niobate: Part I Design of an efficient heralded single photon source co-integrated with superconducting detectors

• URL: http://arxiv.org/abs/2311.09398v1
• Date: Wed, 15 Nov 2023 21:51:12 GMT
• Title: Photonic quantum computing on thin-film lithium niobate: Part I Design of an efficient heralded single photon source co-integrated with superconducting detectors
• Authors: A.Sayem
• Abstract summary: Photonic quantum computers are one of the primary candidates for fault-tolerant quantum computation. To build a practical quantum computer, thousands to millions of such sources are required. We propose a unique single-photon source design on a thin-film lithium niobate platform co-integrated with superconducting nanowire single-photon detectors.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Photonic quantum computers are currently one of the primary candidates for fault-tolerant quantum computation. At the heart of the photonic quantum computation lies the strict requirement for suitable quantum sources e.g. high purity, high brightness single photon sources. To build a practical quantum computer, thousands to millions of such sources are required. In this article, we theoretically propose a unique single-photon source design on a thin-film lithium niobate (TFLN) platform co-integrated with superconducting nanowire single-photon detectors. We show that with a judicial design of single photon source using thin film periodically poled lithium waveguides (PPLN), back-illuminated grating couplers (GCs) and directly bonded or integrated cavity coupled superconducting nanowire single-photon detectors (SNSPDs) can lead to a simple but practical high efficiency heralded single-photon source using the current fabrication technology. Such a device will eliminate the requirement of out coupling of the generated photons and can lead to a fully integrated solution. The proposed design can be useful for fusion-based quantum computation and for multiplexed single photon sources and also for efficient on-chip generation and detection of squeezed light.

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