Preparing high purity initial states for nuclear magnetic resonance quantum computing.
Here we demonstrate how parahydrogen can be used to prepare a two-spin system in an almost pure state which is suitable for implementing nuclear magnetic resonance quantum computation. A 12 ns laser pulse is used to initiate a chemical reaction involving pure parahydrogen (the nuclear spin singlet o...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2004
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| _version_ | 1826304275245957120 |
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| author | Anwar, MS Blazina, D Carteret, H Duckett, S Halstead, T Jones, J Kozak, C Taylor, R |
| author_facet | Anwar, MS Blazina, D Carteret, H Duckett, S Halstead, T Jones, J Kozak, C Taylor, R |
| author_sort | Anwar, MS |
| collection | OXFORD |
| description | Here we demonstrate how parahydrogen can be used to prepare a two-spin system in an almost pure state which is suitable for implementing nuclear magnetic resonance quantum computation. A 12 ns laser pulse is used to initiate a chemical reaction involving pure parahydrogen (the nuclear spin singlet of H2). The product, formed on the micros time scale, contains a hydrogen-derived two-spin system with an effective spin-state purity of 0.916. To achieve a comparable result by direct cooling would require an unmanageable (in the liquid state) temperature of 6.4 mK or an impractical magnetic field of 0.45 MT at room temperature. The resulting spin state has an entanglement of formation of 0.822 and cannot be described by local hidden variable models. |
| first_indexed | 2024-03-07T06:15:19Z |
| format | Journal article |
| id | oxford-uuid:f0e53be4-9324-42df-95df-b673fbffd820 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:15:19Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:f0e53be4-9324-42df-95df-b673fbffd8202022-03-27T11:51:37ZPreparing high purity initial states for nuclear magnetic resonance quantum computing.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f0e53be4-9324-42df-95df-b673fbffd820EnglishSymplectic Elements at Oxford2004Anwar, MSBlazina, DCarteret, HDuckett, SHalstead, TJones, JKozak, CTaylor, RHere we demonstrate how parahydrogen can be used to prepare a two-spin system in an almost pure state which is suitable for implementing nuclear magnetic resonance quantum computation. A 12 ns laser pulse is used to initiate a chemical reaction involving pure parahydrogen (the nuclear spin singlet of H2). The product, formed on the micros time scale, contains a hydrogen-derived two-spin system with an effective spin-state purity of 0.916. To achieve a comparable result by direct cooling would require an unmanageable (in the liquid state) temperature of 6.4 mK or an impractical magnetic field of 0.45 MT at room temperature. The resulting spin state has an entanglement of formation of 0.822 and cannot be described by local hidden variable models. |
| spellingShingle | Anwar, MS Blazina, D Carteret, H Duckett, S Halstead, T Jones, J Kozak, C Taylor, R Preparing high purity initial states for nuclear magnetic resonance quantum computing. |
| title | Preparing high purity initial states for nuclear magnetic resonance quantum computing. |
| title_full | Preparing high purity initial states for nuclear magnetic resonance quantum computing. |
| title_fullStr | Preparing high purity initial states for nuclear magnetic resonance quantum computing. |
| title_full_unstemmed | Preparing high purity initial states for nuclear magnetic resonance quantum computing. |
| title_short | Preparing high purity initial states for nuclear magnetic resonance quantum computing. |
| title_sort | preparing high purity initial states for nuclear magnetic resonance quantum computing |
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