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IEEE Photonics Conference

Continuous-variable cluster states in optical microresonator

Ze Wang, Kangkang Li, Yue Wang, Xin Zhou, Y. H. Cheng, Boxuan Jing, Feng-Xiao Sun, Jincheng Li, Zhilin Li, Qihuang Gong, Qiongyi He, Bei‐Bei Li, Qi‐Fan Yang

Published Nov 10, 2024• 0 citations
Publisher

Abstract

We experimentally demonstrate reconfigurable and scalable continuous-variable cluster states by combining the Kerr microcombs with programmable bichromatic pumps within a single microresonator. The generated two-dimensional cluster states consist of 28 entangled modes in the frequency domain as required for universal quantum information processing.

DOI
10.1109/ipc60965.2024.10799849

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We experimentally demonstrate reconfigurable and scalable continuous-variable cluster states by combining the Kerr microcombs with programmable bichromatic pumps within a single microresonator. The generated two-dimensional cluster states consist of 28 entangled modes in the frequency domain as required for universal quantum information processing.
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Continuous-variable (CV) quantum microcombs generated in high-Q microresonators provide compact, frequency-multiplexed sources of entangled modes for integrated quantum information processing. Although deterministic Kerr-induced two-mode squeezing has been demonstrated on chip, achieving uniform squeezing across a large number of mode pairs remains a central challenge. Here we establish the conditions required for spectrally uniform squeezing and experimentally realize a vacuum-state CV quantum microcomb by combining a microresonator with an engineered single-family mode structure and optimized pump conditions. The device generates 14 independent two-mode squeezed states over a 0.7 THz bandwidth, each exhibiting more than 4 dB of raw squeezing, with a maximum of 4.3 dB. This uniform, high-performance quantum resource represents a key step toward scalable, integrated CV quantum technologies operating beyond classical limits.
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