Design of bright, fiber-coupled and fully factorable photon pair sources
From quantum computation to quantum key distribution, many quantum-enhanced applications rely on the ability to generate pure single photons. Even though the process of spontaneous parametric downconversion (SPDC) is widely used as the basis for photon-pair sources, the conditions for pure heralded...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2010
|
| _version_ | 1826290292237533184 |
|---|---|
| author | Vicent, L U'Ren, AB Rangarajan, R Osorio, C Torres, J Zhang, L Walmsley, I |
| author_facet | Vicent, L U'Ren, AB Rangarajan, R Osorio, C Torres, J Zhang, L Walmsley, I |
| author_sort | Vicent, L |
| collection | OXFORD |
| description | From quantum computation to quantum key distribution, many quantum-enhanced applications rely on the ability to generate pure single photons. Even though the process of spontaneous parametric downconversion (SPDC) is widely used as the basis for photon-pair sources, the conditions for pure heralded single-photon generation, taking into account both spectral and spatial degrees of freedom, have not been fully described. We present an analysis of the spatio-temporal correlations present in photon pairs produced by type-I, non-collinear SPDC. We derive a set of conditions for full factorability in all degrees of freedom-required for the heralding of pure single photons-between the signal and idler modes. In this paper, we consider several possible approaches for the design of bright, fiber-coupled and factorable photon-pair sources. We show through numerical simulations of the exact equations that sources based on: (i) the suppression of spatio-temporal entanglement according to our derived conditions and (ii) a tightly focused pump beam together with optimized fibercollection modes and spectral filtering of the signal and idler photon pairs, lead to a source brightness of the same order of magnitude. Likewise, we find that both of these sources lead to a drastically higher factorable photon-pair flux, compared to an unengineered source. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. |
| first_indexed | 2024-03-07T02:41:56Z |
| format | Journal article |
| id | oxford-uuid:aabe0c34-81df-47ed-bfd3-77043e286232 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:41:56Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:aabe0c34-81df-47ed-bfd3-77043e2862322022-03-27T03:17:09ZDesign of bright, fiber-coupled and fully factorable photon pair sourcesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:aabe0c34-81df-47ed-bfd3-77043e286232EnglishSymplectic Elements at Oxford2010Vicent, LU'Ren, ABRangarajan, ROsorio, CTorres, JZhang, LWalmsley, IFrom quantum computation to quantum key distribution, many quantum-enhanced applications rely on the ability to generate pure single photons. Even though the process of spontaneous parametric downconversion (SPDC) is widely used as the basis for photon-pair sources, the conditions for pure heralded single-photon generation, taking into account both spectral and spatial degrees of freedom, have not been fully described. We present an analysis of the spatio-temporal correlations present in photon pairs produced by type-I, non-collinear SPDC. We derive a set of conditions for full factorability in all degrees of freedom-required for the heralding of pure single photons-between the signal and idler modes. In this paper, we consider several possible approaches for the design of bright, fiber-coupled and factorable photon-pair sources. We show through numerical simulations of the exact equations that sources based on: (i) the suppression of spatio-temporal entanglement according to our derived conditions and (ii) a tightly focused pump beam together with optimized fibercollection modes and spectral filtering of the signal and idler photon pairs, lead to a source brightness of the same order of magnitude. Likewise, we find that both of these sources lead to a drastically higher factorable photon-pair flux, compared to an unengineered source. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. |
| spellingShingle | Vicent, L U'Ren, AB Rangarajan, R Osorio, C Torres, J Zhang, L Walmsley, I Design of bright, fiber-coupled and fully factorable photon pair sources |
| title | Design of bright, fiber-coupled and fully factorable photon pair sources |
| title_full | Design of bright, fiber-coupled and fully factorable photon pair sources |
| title_fullStr | Design of bright, fiber-coupled and fully factorable photon pair sources |
| title_full_unstemmed | Design of bright, fiber-coupled and fully factorable photon pair sources |
| title_short | Design of bright, fiber-coupled and fully factorable photon pair sources |
| title_sort | design of bright fiber coupled and fully factorable photon pair sources |
| work_keys_str_mv | AT vicentl designofbrightfibercoupledandfullyfactorablephotonpairsources AT urenab designofbrightfibercoupledandfullyfactorablephotonpairsources AT rangarajanr designofbrightfibercoupledandfullyfactorablephotonpairsources AT osorioc designofbrightfibercoupledandfullyfactorablephotonpairsources AT torresj designofbrightfibercoupledandfullyfactorablephotonpairsources AT zhangl designofbrightfibercoupledandfullyfactorablephotonpairsources AT walmsleyi designofbrightfibercoupledandfullyfactorablephotonpairsources |