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arXiv 2007.06429physics.app-phquant-ph
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可重构量子光子学与芯片上探测器

Reconfigurable quantum photonics with on-chip detectors

KTH Royal Institute of Technology(皇家理工学院)

Samuel Gyger, Julien Zichi, Lucas Schweickert, Ali W. Elshaari, Stephan Steinhauer, Saimon F. Covre da Silva, Armando Rastelli, Val Zwiller, Klaus D. Jöns, Carlos Errando-Herranz

AI总结:

本文提出一种可重构量子光子学平台,实现高消光比光路由、高动态范围单光子探测及光学激发稳定,突破热敏感超导单光子探测器与热可重构光子学的集成难题。

摘要:

集成量子光子学提供了一种扩展量子光学实验的有前景途径,通过微型化和稳定复杂实验室装置。量子集成光子学的核心元件包括量子发射体、存储器、探测器和可重构光子电路。特别是,集成探测器不仅提供光学读出,当与可重构电路接口时,允许反馈和自适应控制,这对确定性量子 teleportation、神经网络训练和复杂电路稳定至关重要。然而,热可重构光子学产生的热量与热敏感超导单光子探测器不兼容,因此其芯片上集成仍难以实现。本文展示了一种低功耗微机电可重构集成光子电路,与超导单光子探测器在同一芯片上集成。我们演示了三种关键功能:28 dB高消光比光路由、90 dB高动态范围单光子探测,以及12 dB功率变化下的光学激发稳定。我们的平台实现了无热负载的可重构线性光学和自适应控制,这对大规模量子光子学应用中的量子态制备和量子逻辑至关重要。

英文摘要:

Integrated quantum photonics offers a promising path to scale up quantum optics experiments by miniaturizing and stabilizing complex laboratory setups. Central elements of quantum integrated photonics are quantum emitters, memories, detectors, and reconfigurable photonic circuits. In particular, integrated detectors not only offer optical readout but, when interfaced with reconfigurable circuits, allow feedback and adaptive control, crucial for deterministic quantum teleportation, training of neural networks, and stabilization of complex circuits. However, the heat generated by thermally reconfigurable photonics is incompatible with heat-sensitive superconducting single-photon detectors, and thus their on-chip co-integration remains elusive. Here we show low-power microelectromechanical reconfiguration of integrated photonic circuits interfaced with superconducting single-photon detectors on the same chip. We demonstrate three key functionalities for photonic quantum technologies: 28 dB high-extinction routing of classical and quantum light, 90 dB high-dynamic range single-photon detection, and stabilization of optical excitation over 12 dB power variation. Our platform enables heat-load free reconfigurable linear optics and adaptive control, critical for quantum state preparation and quantum logic in large-scale quantum photonics applications.

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