Quantum Analog-to-Digital Converter for Phase Estimation
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866913686262644736 |
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| author | Caruccio, Eugenio Roncallo, Simone Cimini, Valeria Albiero, Riccardo Pentangelo, Ciro Ceccarelli, Francesco Corrielli, Giacomo Osellame, Roberto Spagnolo, Nicolò Maccone, Lorenzo Macchiavello, Chiara Sciarrino, Fabio |
| author_facet | Caruccio, Eugenio Roncallo, Simone Cimini, Valeria Albiero, Riccardo Pentangelo, Ciro Ceccarelli, Francesco Corrielli, Giacomo Osellame, Roberto Spagnolo, Nicolò Maccone, Lorenzo Macchiavello, Chiara Sciarrino, Fabio |
| contents | Traditional quantum metrology assesses precision using the figures of merit of continuous-valued parameter estimation. Recently, quantum digital estimation was introduced: it evaluates the performance information-theoretically by quantifying the number of significant bits of the parameter, redefining key benchmarks like the Heisenberg bound. Here, we report the first experimental realization of a Quantum Analog-to-Digital Converter for quantum metrology, that takes an input continuous parameter and outputs a bit string, using an advanced photonic platform, comprising a fully reconfigurable integrated circuit and a quantum dot source of highly indistinguishable photons. We implement a protocol for digital phase estimation that is capable of surpassing the standard quantum limit, through the simultaneous use of different entangled state resources. We tackle experimental imperfections by employing machine learning techniques for noise deconvolution and estimation process refinement. Our protocol is experimentally benchmarked against classical strategies via the number of recoverable bits of the unknown parameter. Our results open new perspectives for future implementation of quantum digital estimation strategies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_07676 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum Analog-to-Digital Converter for Phase Estimation Caruccio, Eugenio Roncallo, Simone Cimini, Valeria Albiero, Riccardo Pentangelo, Ciro Ceccarelli, Francesco Corrielli, Giacomo Osellame, Roberto Spagnolo, Nicolò Maccone, Lorenzo Macchiavello, Chiara Sciarrino, Fabio Quantum Physics Traditional quantum metrology assesses precision using the figures of merit of continuous-valued parameter estimation. Recently, quantum digital estimation was introduced: it evaluates the performance information-theoretically by quantifying the number of significant bits of the parameter, redefining key benchmarks like the Heisenberg bound. Here, we report the first experimental realization of a Quantum Analog-to-Digital Converter for quantum metrology, that takes an input continuous parameter and outputs a bit string, using an advanced photonic platform, comprising a fully reconfigurable integrated circuit and a quantum dot source of highly indistinguishable photons. We implement a protocol for digital phase estimation that is capable of surpassing the standard quantum limit, through the simultaneous use of different entangled state resources. We tackle experimental imperfections by employing machine learning techniques for noise deconvolution and estimation process refinement. Our protocol is experimentally benchmarked against classical strategies via the number of recoverable bits of the unknown parameter. Our results open new perspectives for future implementation of quantum digital estimation strategies. |
| title | Quantum Analog-to-Digital Converter for Phase Estimation |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2502.07676 |