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Efficient evaluation of optical quantum modules via two-photon high-dimensional interference.

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Title: Efficient evaluation of optical quantum modules via two-photon high-dimensional interference.
Authors: Zhang, Xiaoqian1,2, Luo, Maolin1, Zhou, Xiaoqi1,3 zhouxq8@mail.sysu.edu.cn
Source: Proceedings of the National Academy of Sciences of the United States of America. 3/3/2026, Vol. 123 Issue 9, p1-6. 6p.
Subjects: Optical quantum computing, Quantum interference, Optical processors, Optical interference, Quantum information science
Abstract: The rapid advancement of quantum information technology has increased the demand for precise testing and calibration of quantum modules, especially in optical quantum circuits where module reliability directly impacts system performance. To address this need, we propose a two-photon quantum module evaluation method based on high-dimensional Hong–Ou–Mandel interference. Our method uses multi-degree-of-freedom photon encoding to enable rapid and accurate evaluation of optical quantum modules. Compared to traditional methods such as quantum process tomography and direct fidelity estimation, our method not only simplifies implementation but also significantly minimizes the measurement resources required. Notably, the resource demands remain invariant as the system dimensionality scales, ensuring efficient evaluation even in high-dimensional quantum systems. We validated this method on a programmable silicon photonic chip, demonstrating its ability to accurately evaluate optical quantum module performance while significantly reducing resource consumption. This quantum module evaluation method holds promise for broader applications in the field of optical quantum information technologies. [ABSTRACT FROM AUTHOR]
Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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PubType: Academic Journal
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  Data: Efficient evaluation of optical quantum modules via two-photon high-dimensional interference.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Xiaoqian%22">Zhang, Xiaoqian</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Luo%2C+Maolin%22">Luo, Maolin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhou%2C+Xiaoqi%22">Zhou, Xiaoqi</searchLink><relatesTo>1,3</relatesTo><i> zhouxq8@mail.sysu.edu.cn</i>
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  Data: <searchLink fieldCode="DE" term="%22Optical+quantum+computing%22">Optical quantum computing</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+interference%22">Quantum interference</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+processors%22">Optical processors</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+interference%22">Optical interference</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+information+science%22">Quantum information science</searchLink>
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  Data: The rapid advancement of quantum information technology has increased the demand for precise testing and calibration of quantum modules, especially in optical quantum circuits where module reliability directly impacts system performance. To address this need, we propose a two-photon quantum module evaluation method based on high-dimensional Hong–Ou–Mandel interference. Our method uses multi-degree-of-freedom photon encoding to enable rapid and accurate evaluation of optical quantum modules. Compared to traditional methods such as quantum process tomography and direct fidelity estimation, our method not only simplifies implementation but also significantly minimizes the measurement resources required. Notably, the resource demands remain invariant as the system dimensionality scales, ensuring efficient evaluation even in high-dimensional quantum systems. We validated this method on a programmable silicon photonic chip, demonstrating its ability to accurately evaluate optical quantum module performance while significantly reducing resource consumption. This quantum module evaluation method holds promise for broader applications in the field of optical quantum information technologies. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1073/pnas.2515503123
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        Text: English
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      – SubjectFull: Optical quantum computing
        Type: general
      – SubjectFull: Quantum interference
        Type: general
      – SubjectFull: Optical processors
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              Text: 3/3/2026
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              Y: 2026
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