Approaching a fully-polarized state of nuclear spins in a semiconductor quantum dot
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866916112347693056 |
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| author | Millington-Hotze, Peter Dyte, Harry E. Manna, Santanu da Silva, Saimon F. Covre Rastelli, Armando Chekhovich, Evgeny A. |
| author_facet | Millington-Hotze, Peter Dyte, Harry E. Manna, Santanu da Silva, Saimon F. Covre Rastelli, Armando Chekhovich, Evgeny A. |
| contents | Magnetic noise of atomic nuclear spins is a major problem for solid state spin qubits. Highly-polarized nuclei would not only overcome this obstacle, but also make nuclear spins a useful quantum information resource. However, achieving sufficiently high nuclear polarizations has remained an evasive goal. Here we implement a nuclear spin polarization protocol which combines strong optical pumping and fast electron tunneling. Polarizations well above 95% are generated in GaAs semiconductor quantum dots on a timescale of 1 minute. The technique is compatible with standard quantum dot device designs, where highly-polarized nuclear spins can simplify implementations of quantum bits and memories, as well as offer a testbed for studies of many-body quantum dynamics and magnetism. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2302_05489 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Approaching a fully-polarized state of nuclear spins in a semiconductor quantum dot Millington-Hotze, Peter Dyte, Harry E. Manna, Santanu da Silva, Saimon F. Covre Rastelli, Armando Chekhovich, Evgeny A. Mesoscale and Nanoscale Physics Magnetic noise of atomic nuclear spins is a major problem for solid state spin qubits. Highly-polarized nuclei would not only overcome this obstacle, but also make nuclear spins a useful quantum information resource. However, achieving sufficiently high nuclear polarizations has remained an evasive goal. Here we implement a nuclear spin polarization protocol which combines strong optical pumping and fast electron tunneling. Polarizations well above 95% are generated in GaAs semiconductor quantum dots on a timescale of 1 minute. The technique is compatible with standard quantum dot device designs, where highly-polarized nuclear spins can simplify implementations of quantum bits and memories, as well as offer a testbed for studies of many-body quantum dynamics and magnetism. |
| title | Approaching a fully-polarized state of nuclear spins in a semiconductor quantum dot |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2302.05489 |