Solid-state quantum memory using the (31)P nuclear spin.
The transfer of information between different physical forms-for example processing entities and memory-is a central theme in communication and computation. This is crucial in quantum computation, where great effort must be taken to protect the integrity of a fragile quantum bit (qubit). However, tr...
| Autori principali: | , , , , , , , , , |
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| Natura: | Journal article |
| Lingua: | English |
| Pubblicazione: |
2008
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| _version_ | 1826278684399501312 |
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| author | Morton, J Tyryshkin, A Brown, R Shankar, S Lovett, B Ardavan, A Schenkel, T Haller, E Ager, J Lyon, SA |
| author_facet | Morton, J Tyryshkin, A Brown, R Shankar, S Lovett, B Ardavan, A Schenkel, T Haller, E Ager, J Lyon, SA |
| author_sort | Morton, J |
| collection | OXFORD |
| description | The transfer of information between different physical forms-for example processing entities and memory-is a central theme in communication and computation. This is crucial in quantum computation, where great effort must be taken to protect the integrity of a fragile quantum bit (qubit). However, transfer of quantum information is particularly challenging, as the process must remain coherent at all times to preserve the quantum nature of the information. Here we demonstrate the coherent transfer of a superposition state in an electron-spin 'processing' qubit to a nuclear-spin 'memory' qubit, using a combination of microwave and radio-frequency pulses applied to (31)P donors in an isotopically pure (28)Si crystal. The state is left in the nuclear spin on a timescale that is long compared with the electron decoherence time, and is then coherently transferred back to the electron spin, thus demonstrating the (31)P nuclear spin as a solid-state quantum memory. The overall store-readout fidelity is about 90 per cent, with the loss attributed to imperfect rotations, and can be improved through the use of composite pulses. The coherence lifetime of the quantum memory element at 5.5 K exceeds 1 s. |
| first_indexed | 2024-03-06T23:47:37Z |
| format | Journal article |
| id | oxford-uuid:717ecb7c-fe6d-41a5-92e2-63d06bec5ce6 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:47:37Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:717ecb7c-fe6d-41a5-92e2-63d06bec5ce62022-03-26T19:43:57ZSolid-state quantum memory using the (31)P nuclear spin.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:717ecb7c-fe6d-41a5-92e2-63d06bec5ce6EnglishSymplectic Elements at Oxford2008Morton, JTyryshkin, ABrown, RShankar, SLovett, BArdavan, ASchenkel, THaller, EAger, JLyon, SAThe transfer of information between different physical forms-for example processing entities and memory-is a central theme in communication and computation. This is crucial in quantum computation, where great effort must be taken to protect the integrity of a fragile quantum bit (qubit). However, transfer of quantum information is particularly challenging, as the process must remain coherent at all times to preserve the quantum nature of the information. Here we demonstrate the coherent transfer of a superposition state in an electron-spin 'processing' qubit to a nuclear-spin 'memory' qubit, using a combination of microwave and radio-frequency pulses applied to (31)P donors in an isotopically pure (28)Si crystal. The state is left in the nuclear spin on a timescale that is long compared with the electron decoherence time, and is then coherently transferred back to the electron spin, thus demonstrating the (31)P nuclear spin as a solid-state quantum memory. The overall store-readout fidelity is about 90 per cent, with the loss attributed to imperfect rotations, and can be improved through the use of composite pulses. The coherence lifetime of the quantum memory element at 5.5 K exceeds 1 s. |
| spellingShingle | Morton, J Tyryshkin, A Brown, R Shankar, S Lovett, B Ardavan, A Schenkel, T Haller, E Ager, J Lyon, SA Solid-state quantum memory using the (31)P nuclear spin. |
| title | Solid-state quantum memory using the (31)P nuclear spin. |
| title_full | Solid-state quantum memory using the (31)P nuclear spin. |
| title_fullStr | Solid-state quantum memory using the (31)P nuclear spin. |
| title_full_unstemmed | Solid-state quantum memory using the (31)P nuclear spin. |
| title_short | Solid-state quantum memory using the (31)P nuclear spin. |
| title_sort | solid state quantum memory using the 31 p nuclear spin |
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