Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect
Highly entangled quantum states, shared by remote parties, are vital for quantum communications and metrology. Particularly promising are the N00N states-entangled N-photon wavepackets delocalized between two different locations-which outperform coherent states in measurement sensitivity. However, t...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Springer Nature
2016
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| _version_ | 1826273100821430272 |
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| author | Ulanov, AE Fedorov, IA Sychev, D Grangier, P Lvovsky, AI |
| author_facet | Ulanov, AE Fedorov, IA Sychev, D Grangier, P Lvovsky, AI |
| author_sort | Ulanov, AE |
| collection | OXFORD |
| description | Highly entangled quantum states, shared by remote parties, are vital for quantum communications and metrology. Particularly promising are the N00N states-entangled N-photon wavepackets delocalized between two different locations-which outperform coherent states in measurement sensitivity. However, these states are notoriously vulnerable to losses, making them difficult to both share them between remote locations and recombine in order to exploit interference effects. Here we address this challenge by utilizing the reverse Hong-Ou-Mandel effect to prepare a high-fidelity two-photon N00N state shared between two parties connected by a lossy optical medium. We measure the prepared state by two-mode homodyne tomography, thereby demonstrating that the enhanced phase sensitivity can be exploited without recombining the two parts of the N00N state. Finally, we demonstrate the application of our method to remotely prepare superpositions of coherent states, known as Schrödinger's cat states. |
| first_indexed | 2024-03-06T22:23:02Z |
| format | Journal article |
| id | oxford-uuid:55b877f8-6553-4e1d-ac27-d882f9fde954 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:23:02Z |
| publishDate | 2016 |
| publisher | Springer Nature |
| record_format | dspace |
| spelling | oxford-uuid:55b877f8-6553-4e1d-ac27-d882f9fde9542022-03-26T16:45:45ZLoss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effectJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:55b877f8-6553-4e1d-ac27-d882f9fde954EnglishSymplectic ElementsSpringer Nature2016Ulanov, AEFedorov, IASychev, DGrangier, PLvovsky, AIHighly entangled quantum states, shared by remote parties, are vital for quantum communications and metrology. Particularly promising are the N00N states-entangled N-photon wavepackets delocalized between two different locations-which outperform coherent states in measurement sensitivity. However, these states are notoriously vulnerable to losses, making them difficult to both share them between remote locations and recombine in order to exploit interference effects. Here we address this challenge by utilizing the reverse Hong-Ou-Mandel effect to prepare a high-fidelity two-photon N00N state shared between two parties connected by a lossy optical medium. We measure the prepared state by two-mode homodyne tomography, thereby demonstrating that the enhanced phase sensitivity can be exploited without recombining the two parts of the N00N state. Finally, we demonstrate the application of our method to remotely prepare superpositions of coherent states, known as Schrödinger's cat states. |
| spellingShingle | Ulanov, AE Fedorov, IA Sychev, D Grangier, P Lvovsky, AI Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect |
| title | Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect |
| title_full | Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect |
| title_fullStr | Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect |
| title_full_unstemmed | Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect |
| title_short | Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect |
| title_sort | loss tolerant state engineering for quantum enhanced metrology via the reverse hong ou mandel effect |
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