Subsystem purity as an enforcer of entanglement.
We show that entanglement can always arise in the interaction of an arbitrarily large system in any mixed state with a single qubit in a pure state. This small initial purity is enough to enforce entanglement even when the total entropy is close to maximum. We demonstrate this feature using the Jayn...
| প্রধান লেখক: | , , , |
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| বিন্যাস: | Journal article |
| ভাষা: | English |
| প্রকাশিত: |
2001
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| _version_ | 1826277015440850944 |
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| author | Bose, S Fuentes-Guridi, I Knight, P Vedral, V |
| author_facet | Bose, S Fuentes-Guridi, I Knight, P Vedral, V |
| author_sort | Bose, S |
| collection | OXFORD |
| description | We show that entanglement can always arise in the interaction of an arbitrarily large system in any mixed state with a single qubit in a pure state. This small initial purity is enough to enforce entanglement even when the total entropy is close to maximum. We demonstrate this feature using the Jaynes-Cummings interaction of a two-level atom in a pure state with a field in a thermal state at an arbitrarily high temperature. We find the time and temperature variation of a lower bound on the amount of entanglement produced and study the classical correlations quantified by the mutual information. |
| first_indexed | 2024-03-06T23:22:31Z |
| format | Journal article |
| id | oxford-uuid:69377ccc-c411-40ef-a926-487c82d21e5a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:22:31Z |
| publishDate | 2001 |
| record_format | dspace |
| spelling | oxford-uuid:69377ccc-c411-40ef-a926-487c82d21e5a2022-03-26T18:49:57ZSubsystem purity as an enforcer of entanglement.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:69377ccc-c411-40ef-a926-487c82d21e5aEnglishSymplectic Elements at Oxford2001Bose, SFuentes-Guridi, IKnight, PVedral, VWe show that entanglement can always arise in the interaction of an arbitrarily large system in any mixed state with a single qubit in a pure state. This small initial purity is enough to enforce entanglement even when the total entropy is close to maximum. We demonstrate this feature using the Jaynes-Cummings interaction of a two-level atom in a pure state with a field in a thermal state at an arbitrarily high temperature. We find the time and temperature variation of a lower bound on the amount of entanglement produced and study the classical correlations quantified by the mutual information. |
| spellingShingle | Bose, S Fuentes-Guridi, I Knight, P Vedral, V Subsystem purity as an enforcer of entanglement. |
| title | Subsystem purity as an enforcer of entanglement. |
| title_full | Subsystem purity as an enforcer of entanglement. |
| title_fullStr | Subsystem purity as an enforcer of entanglement. |
| title_full_unstemmed | Subsystem purity as an enforcer of entanglement. |
| title_short | Subsystem purity as an enforcer of entanglement. |
| title_sort | subsystem purity as an enforcer of entanglement |
| work_keys_str_mv | AT boses subsystempurityasanenforcerofentanglement AT fuentesguridii subsystempurityasanenforcerofentanglement AT knightp subsystempurityasanenforcerofentanglement AT vedralv subsystempurityasanenforcerofentanglement |