High-efficiency detection of a single quantum of angular momentum by suppression of optical pumping
We propose and demonstrate experimentally the discrimination between two spin states of an atom purely on the basis of their angular momentum. The discrimination relies on angular momentum selection rules and does not require magnetic effects such as a magnetic dipole moment of the atom or an applie...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Physical Society
2004
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| Subjects: |
| _version_ | 1797094416648765440 |
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| author | McDonnell, M Stacey, J Webster, S Home, J Ramos, A Lucas, D Stacey, D Steane, A |
| author_facet | McDonnell, M Stacey, J Webster, S Home, J Ramos, A Lucas, D Stacey, D Steane, A |
| author_sort | McDonnell, M |
| collection | OXFORD |
| description | We propose and demonstrate experimentally the discrimination between two spin states of an atom purely on the basis of their angular momentum. The discrimination relies on angular momentum selection rules and does not require magnetic effects such as a magnetic dipole moment of the atom or an applied magnetic field. The central ingredient is to prevent by coherent population trapping an optical pumping process which would otherwise relax the spin state before a detectable signal could be obtained. We detected the presence or absence of a single quantum (1ħ) of angular momentum in a trapped calcium ion in a single observation with success probability 0.86. As a practical technique, the method can be applied to read out some types of quantum computer. |
| first_indexed | 2024-03-07T04:13:48Z |
| format | Journal article |
| id | oxford-uuid:c8b6db3d-5df9-46f4-b498-908c1e7c24ff |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:13:48Z |
| publishDate | 2004 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:c8b6db3d-5df9-46f4-b498-908c1e7c24ff2022-03-27T06:54:08ZHigh-efficiency detection of a single quantum of angular momentum by suppression of optical pumpingJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c8b6db3d-5df9-46f4-b498-908c1e7c24ffPhysicsAtomic and laser physicsEnglishOxford University Research Archive - ValetAmerican Physical Society2004McDonnell, MStacey, JWebster, SHome, JRamos, ALucas, DStacey, DSteane, AWe propose and demonstrate experimentally the discrimination between two spin states of an atom purely on the basis of their angular momentum. The discrimination relies on angular momentum selection rules and does not require magnetic effects such as a magnetic dipole moment of the atom or an applied magnetic field. The central ingredient is to prevent by coherent population trapping an optical pumping process which would otherwise relax the spin state before a detectable signal could be obtained. We detected the presence or absence of a single quantum (1ħ) of angular momentum in a trapped calcium ion in a single observation with success probability 0.86. As a practical technique, the method can be applied to read out some types of quantum computer. |
| spellingShingle | Physics Atomic and laser physics McDonnell, M Stacey, J Webster, S Home, J Ramos, A Lucas, D Stacey, D Steane, A High-efficiency detection of a single quantum of angular momentum by suppression of optical pumping |
| title | High-efficiency detection of a single quantum of angular momentum by suppression of optical pumping |
| title_full | High-efficiency detection of a single quantum of angular momentum by suppression of optical pumping |
| title_fullStr | High-efficiency detection of a single quantum of angular momentum by suppression of optical pumping |
| title_full_unstemmed | High-efficiency detection of a single quantum of angular momentum by suppression of optical pumping |
| title_short | High-efficiency detection of a single quantum of angular momentum by suppression of optical pumping |
| title_sort | high efficiency detection of a single quantum of angular momentum by suppression of optical pumping |
| topic | Physics Atomic and laser physics |
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