Probing the non-classicality of temporal correlations
Correlations between spacelike separated measurements on entangled quantum systems are stronger than any classical correlations and are at the heart of numerous quantum technologies. In practice, however, spacelike separation is often not guaranteed and we typically face situations where measurement...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
2017-11-01
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| Series: | Quantum |
| Online Access: | https://quantum-journal.org/q-2017-11-25-35/pdf/ |
| _version_ | 1818027112280358912 |
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| author | Martin Ringbauer Rafael Chaves |
| author_facet | Martin Ringbauer Rafael Chaves |
| author_sort | Martin Ringbauer |
| collection | DOAJ |
| description | Correlations between spacelike separated measurements on entangled quantum systems are stronger than any classical correlations and are at the heart of numerous quantum technologies. In practice, however, spacelike separation is often not guaranteed and we typically face situations where measurements have an underlying time order. Here we aim to provide a fair comparison of classical and quantum models of temporal correlations on a single particle, as well as timelike-separated correlations on multiple particles. We use a causal modeling approach to show, in theory and experiment, that quantum correlations outperform their classical counterpart when allowed equal, but limited communication resources. This provides a clearer picture of the role of quantum correlations in timelike separated scenarios, which play an important role in foundational and practical aspects of quantum information processing. |
| first_indexed | 2024-12-10T04:42:43Z |
| format | Article |
| id | doaj.art-1d68012e4ed34af3af056c048de8023d |
| institution | Directory Open Access Journal |
| issn | 2521-327X |
| language | English |
| last_indexed | 2024-12-10T04:42:43Z |
| publishDate | 2017-11-01 |
| publisher | Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften |
| record_format | Article |
| series | Quantum |
| spelling | doaj.art-1d68012e4ed34af3af056c048de8023d2022-12-22T02:01:50ZengVerein zur Förderung des Open Access Publizierens in den QuantenwissenschaftenQuantum2521-327X2017-11-0113510.22331/q-2017-11-25-3510.22331/q-2017-11-25-35Probing the non-classicality of temporal correlationsMartin RingbauerRafael ChavesCorrelations between spacelike separated measurements on entangled quantum systems are stronger than any classical correlations and are at the heart of numerous quantum technologies. In practice, however, spacelike separation is often not guaranteed and we typically face situations where measurements have an underlying time order. Here we aim to provide a fair comparison of classical and quantum models of temporal correlations on a single particle, as well as timelike-separated correlations on multiple particles. We use a causal modeling approach to show, in theory and experiment, that quantum correlations outperform their classical counterpart when allowed equal, but limited communication resources. This provides a clearer picture of the role of quantum correlations in timelike separated scenarios, which play an important role in foundational and practical aspects of quantum information processing.https://quantum-journal.org/q-2017-11-25-35/pdf/ |
| spellingShingle | Martin Ringbauer Rafael Chaves Probing the non-classicality of temporal correlations Quantum |
| title | Probing the non-classicality of temporal correlations |
| title_full | Probing the non-classicality of temporal correlations |
| title_fullStr | Probing the non-classicality of temporal correlations |
| title_full_unstemmed | Probing the non-classicality of temporal correlations |
| title_short | Probing the non-classicality of temporal correlations |
| title_sort | probing the non classicality of temporal correlations |
| url | https://quantum-journal.org/q-2017-11-25-35/pdf/ |
| work_keys_str_mv | AT martinringbauer probingthenonclassicalityoftemporalcorrelations AT rafaelchaves probingthenonclassicalityoftemporalcorrelations |