Effects of cavity birefringence in polarisation-encoded quantum networks
The generation of entanglement between distant atoms via single photons is the basis for networked quantum computing, a promising route to large-scale trapped-ion and trapped-atom processors. Locating the emitter within an optical cavity provides an efficient matter-light interface, but mirror-induc...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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IOP Publishing
2023
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| _version_ | 1826309712601153536 |
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| author | Kassa, E Hughes, WJ Gao, S Goodwin, JF |
| author_facet | Kassa, E Hughes, WJ Gao, S Goodwin, JF |
| author_sort | Kassa, E |
| collection | OXFORD |
| description | The generation of entanglement between distant atoms via single photons is the basis for networked quantum computing, a promising route to large-scale trapped-ion and trapped-atom processors. Locating the emitter within an optical cavity provides an efficient matter-light interface, but mirror-induced birefringence within the cavity introduces time-dependence to the polarisation of the photons produced. We show that such 'polarisation oscillation' effects can lead to severe loss of fidelity in the context of two-photon, polarisation encoded measurement-based remote entanglement schemes. It is always preferable to suppress these errors at source by minimising mirror ellipticity, but we propose two remedies for systems where this cannot be achieved. We conclude that even modest cavity birefringence can be detrimental to remote entanglement performance, to an extent that may limit the suitability of polarisation-encoded schemes for large-scale quantum networks. |
| first_indexed | 2024-03-07T07:39:49Z |
| format | Journal article |
| id | oxford-uuid:b918d8cb-9f53-4482-91b1-d0e182d67217 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:39:49Z |
| publishDate | 2023 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | oxford-uuid:b918d8cb-9f53-4482-91b1-d0e182d672172023-04-05T12:39:02ZEffects of cavity birefringence in polarisation-encoded quantum networksJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b918d8cb-9f53-4482-91b1-d0e182d67217EnglishSymplectic ElementsIOP Publishing2023Kassa, EHughes, WJGao, SGoodwin, JFThe generation of entanglement between distant atoms via single photons is the basis for networked quantum computing, a promising route to large-scale trapped-ion and trapped-atom processors. Locating the emitter within an optical cavity provides an efficient matter-light interface, but mirror-induced birefringence within the cavity introduces time-dependence to the polarisation of the photons produced. We show that such 'polarisation oscillation' effects can lead to severe loss of fidelity in the context of two-photon, polarisation encoded measurement-based remote entanglement schemes. It is always preferable to suppress these errors at source by minimising mirror ellipticity, but we propose two remedies for systems where this cannot be achieved. We conclude that even modest cavity birefringence can be detrimental to remote entanglement performance, to an extent that may limit the suitability of polarisation-encoded schemes for large-scale quantum networks. |
| spellingShingle | Kassa, E Hughes, WJ Gao, S Goodwin, JF Effects of cavity birefringence in polarisation-encoded quantum networks |
| title | Effects of cavity birefringence in polarisation-encoded quantum networks |
| title_full | Effects of cavity birefringence in polarisation-encoded quantum networks |
| title_fullStr | Effects of cavity birefringence in polarisation-encoded quantum networks |
| title_full_unstemmed | Effects of cavity birefringence in polarisation-encoded quantum networks |
| title_short | Effects of cavity birefringence in polarisation-encoded quantum networks |
| title_sort | effects of cavity birefringence in polarisation encoded quantum networks |
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