Limitations of two-level emitters as nonlinearities in two-photon controlled-phase gates
We investigate the origin of imperfections in the fidelity of a two-photon controlled-phase gate based on two-level-emitter nonlinearities. We focus on a passive system that operates without external modulations to enhance its performance. We demonstrate that the fidelity of the gate is limited by o...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Physical Society
2017
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| Online Access: | http://hdl.handle.net/1721.1/109755 https://orcid.org/0000-0001-7175-4473 |
| _version_ | 1826201739093606400 |
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| author | Nysteen, Anders McCutcheon, Dara P. S. Heuck, Mikkel Mørk, Jesper Englund, Dirk R. |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Nysteen, Anders McCutcheon, Dara P. S. Heuck, Mikkel Mørk, Jesper Englund, Dirk R. |
| author_sort | Nysteen, Anders |
| collection | MIT |
| description | We investigate the origin of imperfections in the fidelity of a two-photon controlled-phase gate based on two-level-emitter nonlinearities. We focus on a passive system that operates without external modulations to enhance its performance. We demonstrate that the fidelity of the gate is limited by opposing requirements on the input pulse width for one- and two-photon-scattering events. For one-photon scattering, the spectral pulse width must be narrow compared with the emitter linewidth, while two-photon-scattering processes require the pulse width and emitter linewidth to be comparable. We find that these opposing requirements limit the maximum fidelity of the two-photon controlled-phase gate to 84% for photons with Gaussian spectral profiles. |
| first_indexed | 2024-09-23T11:56:19Z |
| format | Article |
| id | mit-1721.1/109755 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:56:19Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1097552022-10-01T07:06:51Z Limitations of two-level emitters as nonlinearities in two-photon controlled-phase gates Nysteen, Anders McCutcheon, Dara P. S. Heuck, Mikkel Mørk, Jesper Englund, Dirk R. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Heuck, Mikkel We investigate the origin of imperfections in the fidelity of a two-photon controlled-phase gate based on two-level-emitter nonlinearities. We focus on a passive system that operates without external modulations to enhance its performance. We demonstrate that the fidelity of the gate is limited by opposing requirements on the input pulse width for one- and two-photon-scattering events. For one-photon scattering, the spectral pulse width must be narrow compared with the emitter linewidth, while two-photon-scattering processes require the pulse width and emitter linewidth to be comparable. We find that these opposing requirements limit the maximum fidelity of the two-photon controlled-phase gate to 84% for photons with Gaussian spectral profiles. Danish Council for Independent Research (1325-00144) 2017-06-08T19:13:25Z 2017-06-08T19:13:25Z 2017-06 2016-12 2017-06-05T22:00:07Z Article http://purl.org/eprint/type/JournalArticle 2469-9926 2469-9934 http://hdl.handle.net/1721.1/109755 Nysteen, Anders et al. “Limitations of Two-Level Emitters as Nonlinearities in Two-Photon Controlled-Phase Gates.” Physical Review A 95.6 (2017): n. pag. © 2017 American Physical Society https://orcid.org/0000-0001-7175-4473 en http://dx.doi.org/10.1103/PhysRevA.95.062304 Physical Review A Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Nysteen, Anders McCutcheon, Dara P. S. Heuck, Mikkel Mørk, Jesper Englund, Dirk R. Limitations of two-level emitters as nonlinearities in two-photon controlled-phase gates |
| title | Limitations of two-level emitters as nonlinearities in two-photon controlled-phase gates |
| title_full | Limitations of two-level emitters as nonlinearities in two-photon controlled-phase gates |
| title_fullStr | Limitations of two-level emitters as nonlinearities in two-photon controlled-phase gates |
| title_full_unstemmed | Limitations of two-level emitters as nonlinearities in two-photon controlled-phase gates |
| title_short | Limitations of two-level emitters as nonlinearities in two-photon controlled-phase gates |
| title_sort | limitations of two level emitters as nonlinearities in two photon controlled phase gates |
| url | http://hdl.handle.net/1721.1/109755 https://orcid.org/0000-0001-7175-4473 |
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