Implementing arbitrary multi-mode continuous-variable quantum gates with fixed non-Gaussian states and adaptive linear optics
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866915340138577920 |
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| author | Hanamura, Fumiya Asavanant, Warit Nagayoshi, Hironari Sakaguchi, Atsushi Ide, Ryuhoh Fukui, Kosuke van Loock, Peter Furusawa, Akira |
| author_facet | Hanamura, Fumiya Asavanant, Warit Nagayoshi, Hironari Sakaguchi, Atsushi Ide, Ryuhoh Fukui, Kosuke van Loock, Peter Furusawa, Akira |
| contents | Non-Gaussian quantum gates are essential components for optical quantum information processing. However, the efficient implementation of practically important multi-mode higher-order non-Gaussian gates has not been comprehensively studied. We propose a measurement-based method to directly implement general, multi-mode, and higher-order non-Gaussian gates using only fixed non-Gaussian ancillary states and adaptive linear optics. Compared to existing methods, our method allows for a more resource-efficient and experimentally feasible implementation of multi-mode gates that are important for various applications in optical quantum technology, such as the two-mode cubic quantum non-demolition gate or the three-mode continuous-variable Toffoli gate, and their higher-order extensions. Our results will expedite the progress toward fault-tolerant universal quantum computing with light. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2405_19067 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Implementing arbitrary multi-mode continuous-variable quantum gates with fixed non-Gaussian states and adaptive linear optics Hanamura, Fumiya Asavanant, Warit Nagayoshi, Hironari Sakaguchi, Atsushi Ide, Ryuhoh Fukui, Kosuke van Loock, Peter Furusawa, Akira Quantum Physics Non-Gaussian quantum gates are essential components for optical quantum information processing. However, the efficient implementation of practically important multi-mode higher-order non-Gaussian gates has not been comprehensively studied. We propose a measurement-based method to directly implement general, multi-mode, and higher-order non-Gaussian gates using only fixed non-Gaussian ancillary states and adaptive linear optics. Compared to existing methods, our method allows for a more resource-efficient and experimentally feasible implementation of multi-mode gates that are important for various applications in optical quantum technology, such as the two-mode cubic quantum non-demolition gate or the three-mode continuous-variable Toffoli gate, and their higher-order extensions. Our results will expedite the progress toward fault-tolerant universal quantum computing with light. |
| title | Implementing arbitrary multi-mode continuous-variable quantum gates with fixed non-Gaussian states and adaptive linear optics |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2405.19067 |