Optimal experiment design for quantum state tomography: Fair, precise, and minimal tomography
Given an experimental setup and a fixed number of measurements, how should one take data to optimally reconstruct the state of a quantum system? The problem of optimal experiment design (OED) for quantum state tomography was first broached by Kosut. Here we provide efficient numerical algorithms for...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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2010
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| _version_ | 1797054865391747072 |
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| author | Nunn, J Smith, B Puentes, G Walmsley, I Lundeen, J |
| author_facet | Nunn, J Smith, B Puentes, G Walmsley, I Lundeen, J |
| author_sort | Nunn, J |
| collection | OXFORD |
| description | Given an experimental setup and a fixed number of measurements, how should one take data to optimally reconstruct the state of a quantum system? The problem of optimal experiment design (OED) for quantum state tomography was first broached by Kosut. Here we provide efficient numerical algorithms for finding the optimal design, and analytic results for the case of 'minimal tomography'. We also introduce the average OED, which is independent of the state to be reconstructed, and the optimal design for tomography (ODT), which minimizes tomographic bias. Monte Carlo simulations confirm the utility of our results for qubits. Finally, we adapt our approach to deal with constrained techniques such as maximum-likelihood estimation. We find that these are less amenable to optimization than cruder reconstruction methods, such as linear inversion. © 2010 The American Physical Society. |
| first_indexed | 2024-03-06T19:03:19Z |
| format | Journal article |
| id | oxford-uuid:14480def-a2c3-4f6f-9d2c-9c1393c41e10 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:03:19Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:14480def-a2c3-4f6f-9d2c-9c1393c41e102022-03-26T10:18:50ZOptimal experiment design for quantum state tomography: Fair, precise, and minimal tomographyJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:14480def-a2c3-4f6f-9d2c-9c1393c41e10EnglishSymplectic Elements at Oxford2010Nunn, JSmith, BPuentes, GWalmsley, ILundeen, JGiven an experimental setup and a fixed number of measurements, how should one take data to optimally reconstruct the state of a quantum system? The problem of optimal experiment design (OED) for quantum state tomography was first broached by Kosut. Here we provide efficient numerical algorithms for finding the optimal design, and analytic results for the case of 'minimal tomography'. We also introduce the average OED, which is independent of the state to be reconstructed, and the optimal design for tomography (ODT), which minimizes tomographic bias. Monte Carlo simulations confirm the utility of our results for qubits. Finally, we adapt our approach to deal with constrained techniques such as maximum-likelihood estimation. We find that these are less amenable to optimization than cruder reconstruction methods, such as linear inversion. © 2010 The American Physical Society. |
| spellingShingle | Nunn, J Smith, B Puentes, G Walmsley, I Lundeen, J Optimal experiment design for quantum state tomography: Fair, precise, and minimal tomography |
| title | Optimal experiment design for quantum state tomography: Fair, precise, and minimal tomography |
| title_full | Optimal experiment design for quantum state tomography: Fair, precise, and minimal tomography |
| title_fullStr | Optimal experiment design for quantum state tomography: Fair, precise, and minimal tomography |
| title_full_unstemmed | Optimal experiment design for quantum state tomography: Fair, precise, and minimal tomography |
| title_short | Optimal experiment design for quantum state tomography: Fair, precise, and minimal tomography |
| title_sort | optimal experiment design for quantum state tomography fair precise and minimal tomography |
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