Optimal quantum phase estimation.
By using a systematic optimization approach, we determine quantum states of light with definite photon number leading to the best possible precision in optical two-mode interferometry. Our treatment takes into account the experimentally relevant situation of photon losses. Our results thus reveal th...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2009
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| _version_ | 1797075067648081920 |
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| author | Dorner, U Demkowicz-Dobrzanski, R Smith, B Lundeen, J Wasilewski, W Banaszek, K Walmsley, I |
| author_facet | Dorner, U Demkowicz-Dobrzanski, R Smith, B Lundeen, J Wasilewski, W Banaszek, K Walmsley, I |
| author_sort | Dorner, U |
| collection | OXFORD |
| description | By using a systematic optimization approach, we determine quantum states of light with definite photon number leading to the best possible precision in optical two-mode interferometry. Our treatment takes into account the experimentally relevant situation of photon losses. Our results thus reveal the benchmark for precision in optical interferometry. Although this boundary is generally worse than the Heisenberg limit, we show that the obtained precision beats the standard quantum limit, thus leading to a significant improvement compared to classical interferometers. We furthermore discuss alternative states and strategies to the optimized states which are easier to generate at the cost of only slightly lower precision. |
| first_indexed | 2024-03-06T23:45:07Z |
| format | Journal article |
| id | oxford-uuid:70a060bb-46a7-486a-b687-9eec46c6f290 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:45:07Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:70a060bb-46a7-486a-b687-9eec46c6f2902022-03-26T19:38:25ZOptimal quantum phase estimation.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:70a060bb-46a7-486a-b687-9eec46c6f290EnglishSymplectic Elements at Oxford2009Dorner, UDemkowicz-Dobrzanski, RSmith, BLundeen, JWasilewski, WBanaszek, KWalmsley, IBy using a systematic optimization approach, we determine quantum states of light with definite photon number leading to the best possible precision in optical two-mode interferometry. Our treatment takes into account the experimentally relevant situation of photon losses. Our results thus reveal the benchmark for precision in optical interferometry. Although this boundary is generally worse than the Heisenberg limit, we show that the obtained precision beats the standard quantum limit, thus leading to a significant improvement compared to classical interferometers. We furthermore discuss alternative states and strategies to the optimized states which are easier to generate at the cost of only slightly lower precision. |
| spellingShingle | Dorner, U Demkowicz-Dobrzanski, R Smith, B Lundeen, J Wasilewski, W Banaszek, K Walmsley, I Optimal quantum phase estimation. |
| title | Optimal quantum phase estimation. |
| title_full | Optimal quantum phase estimation. |
| title_fullStr | Optimal quantum phase estimation. |
| title_full_unstemmed | Optimal quantum phase estimation. |
| title_short | Optimal quantum phase estimation. |
| title_sort | optimal quantum phase estimation |
| work_keys_str_mv | AT dorneru optimalquantumphaseestimation AT demkowiczdobrzanskir optimalquantumphaseestimation AT smithb optimalquantumphaseestimation AT lundeenj optimalquantumphaseestimation AT wasilewskiw optimalquantumphaseestimation AT banaszekk optimalquantumphaseestimation AT walmsleyi optimalquantumphaseestimation |