Optimally preserving quantum correlations and coherence with eternally non-Markovian dynamics
We demonstrate, both analytically and experimentally, the usefulness of non-Markovianity for preserving correlations and coherence in quantum systems. For this, we consider a broad class of qubit evolutions, having a decoherence matrix separated from zero for large times. While any such Markovian ev...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac6820 |
| _version_ | 1827871105584463872 |
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| author | Marek Miller Kang-Da Wu Manfredi Scalici Jan Kołodyński Guo-Yong Xiang Chuan-Feng Li Guang-Can Guo Alexander Streltsov |
| author_facet | Marek Miller Kang-Da Wu Manfredi Scalici Jan Kołodyński Guo-Yong Xiang Chuan-Feng Li Guang-Can Guo Alexander Streltsov |
| author_sort | Marek Miller |
| collection | DOAJ |
| description | We demonstrate, both analytically and experimentally, the usefulness of non-Markovianity for preserving correlations and coherence in quantum systems. For this, we consider a broad class of qubit evolutions, having a decoherence matrix separated from zero for large times. While any such Markovian evolution leads to an exponential loss of correlations, non-Markovianity can help to preserve correlations even in the limit t → ∞. In fact, under general assumptions, eternally non-Markovian evolution naturally emerges as the one that allows for optimal preservation of quantum correlations. For covariant qubit evolutions, we also show that non-Markovianity can be used to preserve quantum coherence at all times, which is an important resource for quantum metrology. We explicitly demonstrate this effect experimentally with linear optics, by implementing the optimal non-Markovian quantum evolution. |
| first_indexed | 2024-03-12T16:05:19Z |
| format | Article |
| id | doaj.art-2521ad3f0fd3495890e0c66d873e9f9f |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:05:19Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-2521ad3f0fd3495890e0c66d873e9f9f2023-08-09T14:22:32ZengIOP PublishingNew Journal of Physics1367-26302022-01-0124505302210.1088/1367-2630/ac6820Optimally preserving quantum correlations and coherence with eternally non-Markovian dynamicsMarek Miller0Kang-Da Wu1Manfredi Scalici2Jan Kołodyński3https://orcid.org/0000-0001-8211-0016Guo-Yong Xiang4Chuan-Feng Li5https://orcid.org/0000-0001-6815-8929Guang-Can Guo6Alexander Streltsov7https://orcid.org/0000-0002-7742-5731Centre for Quantum Optical Technologies, Centre of New Technologies, University of Warsaw , Banacha 2c, 02-097 Warsaw, PolandCAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, 230026, People’s Republic of ChinaCentre for Quantum Optical Technologies, Centre of New Technologies, University of Warsaw , Banacha 2c, 02-097 Warsaw, PolandCentre for Quantum Optical Technologies, Centre of New Technologies, University of Warsaw , Banacha 2c, 02-097 Warsaw, PolandCAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, 230026, People’s Republic of ChinaCAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, 230026, People’s Republic of ChinaCAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei 230026, People’s Republic of China; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, 230026, People’s Republic of ChinaCentre for Quantum Optical Technologies, Centre of New Technologies, University of Warsaw , Banacha 2c, 02-097 Warsaw, PolandWe demonstrate, both analytically and experimentally, the usefulness of non-Markovianity for preserving correlations and coherence in quantum systems. For this, we consider a broad class of qubit evolutions, having a decoherence matrix separated from zero for large times. While any such Markovian evolution leads to an exponential loss of correlations, non-Markovianity can help to preserve correlations even in the limit t → ∞. In fact, under general assumptions, eternally non-Markovian evolution naturally emerges as the one that allows for optimal preservation of quantum correlations. For covariant qubit evolutions, we also show that non-Markovianity can be used to preserve quantum coherence at all times, which is an important resource for quantum metrology. We explicitly demonstrate this effect experimentally with linear optics, by implementing the optimal non-Markovian quantum evolution.https://doi.org/10.1088/1367-2630/ac6820non-Markovianityopen systemsquantum infoqubits |
| spellingShingle | Marek Miller Kang-Da Wu Manfredi Scalici Jan Kołodyński Guo-Yong Xiang Chuan-Feng Li Guang-Can Guo Alexander Streltsov Optimally preserving quantum correlations and coherence with eternally non-Markovian dynamics New Journal of Physics non-Markovianity open systems quantum info qubits |
| title | Optimally preserving quantum correlations and coherence with eternally non-Markovian dynamics |
| title_full | Optimally preserving quantum correlations and coherence with eternally non-Markovian dynamics |
| title_fullStr | Optimally preserving quantum correlations and coherence with eternally non-Markovian dynamics |
| title_full_unstemmed | Optimally preserving quantum correlations and coherence with eternally non-Markovian dynamics |
| title_short | Optimally preserving quantum correlations and coherence with eternally non-Markovian dynamics |
| title_sort | optimally preserving quantum correlations and coherence with eternally non markovian dynamics |
| topic | non-Markovianity open systems quantum info qubits |
| url | https://doi.org/10.1088/1367-2630/ac6820 |
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