Breeding the Cat Through Superposition of Two Schrodinger Kittens Based on Coupled Waveguides

Optical Schrodinger's cat (SC) is highly anticipated because of the potential of realizing fault-tolerant quantum computing, but the practical merit is only shown when the amplitude is larger than 2. However, such high-amplitude cats have not been prepared due to the limitations rooted in the e...

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Bibliographic Details
Main Authors Wang, Nuo, Zhang, Xinchen, Liu, Qi, Sun, Fengxiao, He, Qiongyi, Gu, Ying
Format Journal Article
LanguageEnglish
Published 02.07.2024
Subjects
Physics - Quantum Physics
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Summary:Optical Schrodinger's cat (SC) is highly anticipated because of the potential of realizing fault-tolerant quantum computing, but the practical merit is only shown when the amplitude is larger than 2. However, such high-amplitude cats have not been prepared due to the limitations rooted in the existing method. Here, we demonstrate a principle that a large SC-like state can be generated by the superposition of two kittens in which two nearby coherent states interfere and grow to an enlarged coherent-like state. Further, we propose a scheme to breed the cat beyond the limitation in the former works with a high probability by realizing the superposition of two SCs in coupled waveguides. The principle and scheme demonstrated here provide a new perspective on understanding quantum superposition in phase space and a better solution for the efficient generation of SCs on chips.
DOI:10.48550/arxiv.2407.02784