Quantum reservoir computing with classical and nonclassical states in an integrated optical circuit
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866911524646289408 |
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| author | Świerczewski, S. Verstraelen, W. Deuar, P. Liew, T. C. H. Opala, A. Matuszewski, M. |
| author_facet | Świerczewski, S. Verstraelen, W. Deuar, P. Liew, T. C. H. Opala, A. Matuszewski, M. |
| contents | Quantum reservoir computing (QRC) is a hardware-implementation-friendly quantum neural network scheme with minimal physical system requirements and a proven advantage over classical counterparts. We use an extension of the positive-P phase space method to efficiently simulate a bosonic, linear silicon-chip based QRC system excited with a single nonclassical state, a "kitten" state. In combination with input-encoding coherent states, our method allows to obtain exact results for all correlation functions without Hilbert space cutoff. Surprisingly, we find that such a setting - where the only "quantumness'' derives from a single input mode, is sufficient to obtain significant (over 9-fold) reduction of classification error over the classical counterpart. Our work provides a promising direction toward efficient quantum computation with accessible optical hardware. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_17103 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quantum reservoir computing with classical and nonclassical states in an integrated optical circuit Świerczewski, S. Verstraelen, W. Deuar, P. Liew, T. C. H. Opala, A. Matuszewski, M. Quantum Physics Optics Quantum reservoir computing (QRC) is a hardware-implementation-friendly quantum neural network scheme with minimal physical system requirements and a proven advantage over classical counterparts. We use an extension of the positive-P phase space method to efficiently simulate a bosonic, linear silicon-chip based QRC system excited with a single nonclassical state, a "kitten" state. In combination with input-encoding coherent states, our method allows to obtain exact results for all correlation functions without Hilbert space cutoff. Surprisingly, we find that such a setting - where the only "quantumness'' derives from a single input mode, is sufficient to obtain significant (over 9-fold) reduction of classification error over the classical counterpart. Our work provides a promising direction toward efficient quantum computation with accessible optical hardware. |
| title | Quantum reservoir computing with classical and nonclassical states in an integrated optical circuit |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2603.17103 |