Measures and applications of quantum correlations
Quantum information theory is built upon the realisation that quantum resources like coherence and entanglement can be exploited for novel or enhanced ways of transmitting and manipulating information, such as quantum cryptography, teleportation, and quantum computing. We now know that there is pote...
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| Format: | Article |
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IOP
2016
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| Online Access: | https://eprints.nottingham.ac.uk/40782/ |
| _version_ | 1848796132636884992 |
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| author | Adesso, Gerardo Bromley, Thomas R. Cianciaruso, Marco |
| author_facet | Adesso, Gerardo Bromley, Thomas R. Cianciaruso, Marco |
| author_sort | Adesso, Gerardo |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Quantum information theory is built upon the realisation that quantum resources like coherence and entanglement can be exploited for novel or enhanced ways of transmitting and manipulating information, such as quantum cryptography, teleportation, and quantum computing. We now know that there is potentially much more than entanglement behind the power of quantum information processing. There exist more general forms of non-classical correlations, stemming from fundamental principles such as the necessary disturbance induced by a local measurement, or the persistence of quantum coherence in all possible local bases. These signatures can be identified and are resilient in almost all quantum states, and have been linked to the enhanced performance of certain quantum protocols over classical ones in noisy conditions. Their presence represents, among other things, one of the most essential manifestations of quantumness in cooperative systems, from the subatomic to the macroscopic domain. In this work we give an overview of the current quest for a proper understanding and characterisation of the frontier between classical and quantum correlations (QCs) in composite states. We focus on various approaches to define and quantify general QCs, based on different yet interlinked physical perspectives, and comment on the operational significance of the ensuing measures for quantum technology tasks such as information encoding, distribution, discrimination and metrology. We then provide a broader outlook of a few applications in which quantumness beyond entanglement looks fit to play a key role. |
| first_indexed | 2025-11-14T19:43:07Z |
| format | Article |
| id | nottingham-40782 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:43:07Z |
| publishDate | 2016 |
| publisher | IOP |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-407822020-05-04T18:22:30Z https://eprints.nottingham.ac.uk/40782/ Measures and applications of quantum correlations Adesso, Gerardo Bromley, Thomas R. Cianciaruso, Marco Quantum information theory is built upon the realisation that quantum resources like coherence and entanglement can be exploited for novel or enhanced ways of transmitting and manipulating information, such as quantum cryptography, teleportation, and quantum computing. We now know that there is potentially much more than entanglement behind the power of quantum information processing. There exist more general forms of non-classical correlations, stemming from fundamental principles such as the necessary disturbance induced by a local measurement, or the persistence of quantum coherence in all possible local bases. These signatures can be identified and are resilient in almost all quantum states, and have been linked to the enhanced performance of certain quantum protocols over classical ones in noisy conditions. Their presence represents, among other things, one of the most essential manifestations of quantumness in cooperative systems, from the subatomic to the macroscopic domain. In this work we give an overview of the current quest for a proper understanding and characterisation of the frontier between classical and quantum correlations (QCs) in composite states. We focus on various approaches to define and quantify general QCs, based on different yet interlinked physical perspectives, and comment on the operational significance of the ensuing measures for quantum technology tasks such as information encoding, distribution, discrimination and metrology. We then provide a broader outlook of a few applications in which quantumness beyond entanglement looks fit to play a key role. IOP 2016-11-03 Article PeerReviewed Adesso, Gerardo, Bromley, Thomas R. and Cianciaruso, Marco (2016) Measures and applications of quantum correlations. Journal of Physics A: Mathematical and Theoretical, 49 (47). p. 473001. ISSN 1751-8113 Quantum correlations quantum discord quantum technologies http://dx.doi.org/10.1088/1751-8113/49/47/473001 doi:10.1088/1751-8113/49/47/473001 doi:10.1088/1751-8113/49/47/473001 |
| spellingShingle | Quantum correlations quantum discord quantum technologies Adesso, Gerardo Bromley, Thomas R. Cianciaruso, Marco Measures and applications of quantum correlations |
| title | Measures and applications of quantum correlations |
| title_full | Measures and applications of quantum correlations |
| title_fullStr | Measures and applications of quantum correlations |
| title_full_unstemmed | Measures and applications of quantum correlations |
| title_short | Measures and applications of quantum correlations |
| title_sort | measures and applications of quantum correlations |
| topic | Quantum correlations quantum discord quantum technologies |
| url | https://eprints.nottingham.ac.uk/40782/ https://eprints.nottingham.ac.uk/40782/ https://eprints.nottingham.ac.uk/40782/ |