Resource-efficient universal photonic processor based on time-multiplexed hybrid architectures
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914579797245952 |
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| author | Lammers, Jonas Ares, Laura Pegoraro, Federico Held, Philip Brecht, Benjamin Sperling, Jan Silberhorn, Christine |
| author_facet | Lammers, Jonas Ares, Laura Pegoraro, Federico Held, Philip Brecht, Benjamin Sperling, Jan Silberhorn, Christine |
| contents | For the ever-growing field of quantum information processing, large-scale, efficient multi-port interferometers serving as photonic processors are required. In this context, the suitability of quantum walks as the interferometric base for universal computation has been theoretically proven. In this work, we bridge the gap between theoretical proposals and state-of-the-art experimental capabilities by providing the recipe for the implementation of a universal photonic processor in discrete-time quantum walks. Specifically, we present the protocol how to translate arbitrary linear transformations into the coin and step operator of a quantum walk and map these to the experimental parameters of the established time-multiplexed platform. We show that our interface is highly scalable and resource-efficient due to the hybrid encoding consisting of multiple degrees of freedom. Finally, we prove that our system is highly resilient against experimental imperfections and show that it compares favorably against existing architectures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_22521 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Resource-efficient universal photonic processor based on time-multiplexed hybrid architectures Lammers, Jonas Ares, Laura Pegoraro, Federico Held, Philip Brecht, Benjamin Sperling, Jan Silberhorn, Christine Quantum Physics For the ever-growing field of quantum information processing, large-scale, efficient multi-port interferometers serving as photonic processors are required. In this context, the suitability of quantum walks as the interferometric base for universal computation has been theoretically proven. In this work, we bridge the gap between theoretical proposals and state-of-the-art experimental capabilities by providing the recipe for the implementation of a universal photonic processor in discrete-time quantum walks. Specifically, we present the protocol how to translate arbitrary linear transformations into the coin and step operator of a quantum walk and map these to the experimental parameters of the established time-multiplexed platform. We show that our interface is highly scalable and resource-efficient due to the hybrid encoding consisting of multiple degrees of freedom. Finally, we prove that our system is highly resilient against experimental imperfections and show that it compares favorably against existing architectures. |
| title | Resource-efficient universal photonic processor based on time-multiplexed hybrid architectures |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2509.22521 |