Measuring quantumness: from theory to observability in interferometric setups
We investigate the notion of quantumness based on the noncommutativity of the algebra of observables and introduce a measure of quantumness based on the mutual incompatibility of quantum states. We show that such a quantity can be experimentally measured with an interferometric setup and that, when...
| Main Authors: | , , , , , |
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| פורמט: | Journal article |
| יצא לאור: |
EDP Sciences
2018
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| _version_ | 1826289226601201664 |
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| author | Ferro, L Fazio, R Illuminati, F Marmo, G Pascazio, S Vedral, V |
| author_facet | Ferro, L Fazio, R Illuminati, F Marmo, G Pascazio, S Vedral, V |
| author_sort | Ferro, L |
| collection | OXFORD |
| description | We investigate the notion of quantumness based on the noncommutativity of the algebra of observables and introduce a measure of quantumness based on the mutual incompatibility of quantum states. We show that such a quantity can be experimentally measured with an interferometric setup and that, when an arbitrary bipartition of a given composite system is introduced, it detects the one-way quantum correlations restricted to one of the two subsystems. We finally show that, by combining only two projective measurements and carrying out the interference procedure, our measure becomes an efficient universal witness of quantum discord and nonclassical correlations. |
| first_indexed | 2024-03-07T02:25:40Z |
| format | Journal article |
| id | oxford-uuid:a57c647c-f725-4ace-8cdb-fcdb94b7f1b0 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T02:25:40Z |
| publishDate | 2018 |
| publisher | EDP Sciences |
| record_format | dspace |
| spelling | oxford-uuid:a57c647c-f725-4ace-8cdb-fcdb94b7f1b02022-03-27T02:41:00ZMeasuring quantumness: from theory to observability in interferometric setupsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a57c647c-f725-4ace-8cdb-fcdb94b7f1b0Symplectic Elements at OxfordEDP Sciences2018Ferro, LFazio, RIlluminati, FMarmo, GPascazio, SVedral, VWe investigate the notion of quantumness based on the noncommutativity of the algebra of observables and introduce a measure of quantumness based on the mutual incompatibility of quantum states. We show that such a quantity can be experimentally measured with an interferometric setup and that, when an arbitrary bipartition of a given composite system is introduced, it detects the one-way quantum correlations restricted to one of the two subsystems. We finally show that, by combining only two projective measurements and carrying out the interference procedure, our measure becomes an efficient universal witness of quantum discord and nonclassical correlations. |
| spellingShingle | Ferro, L Fazio, R Illuminati, F Marmo, G Pascazio, S Vedral, V Measuring quantumness: from theory to observability in interferometric setups |
| title | Measuring quantumness: from theory to observability in interferometric setups |
| title_full | Measuring quantumness: from theory to observability in interferometric setups |
| title_fullStr | Measuring quantumness: from theory to observability in interferometric setups |
| title_full_unstemmed | Measuring quantumness: from theory to observability in interferometric setups |
| title_short | Measuring quantumness: from theory to observability in interferometric setups |
| title_sort | measuring quantumness from theory to observability in interferometric setups |
| work_keys_str_mv | AT ferrol measuringquantumnessfromtheorytoobservabilityininterferometricsetups AT fazior measuringquantumnessfromtheorytoobservabilityininterferometricsetups AT illuminatif measuringquantumnessfromtheorytoobservabilityininterferometricsetups AT marmog measuringquantumnessfromtheorytoobservabilityininterferometricsetups AT pascazios measuringquantumnessfromtheorytoobservabilityininterferometricsetups AT vedralv measuringquantumnessfromtheorytoobservabilityininterferometricsetups |