Optically induced nuclear spin–spin couplings in GaAs manifested by spin echo decays under optical pumping
Abstract Optically induced nuclear spin–spin coupling in semiconductors is expected to serve for gate operations in nuclear-magnetic-resonance (NMR) quantum computations. However, not much is known about its characteristics. In this study, we investigate optically induced couplings in GaAs via doubl...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-05-01
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| Series: | npj Quantum Information |
| Online Access: | https://doi.org/10.1038/s41534-022-00571-x |
| _version_ | 1811341092729126912 |
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| author | Atsushi Goto Kenjiro Hashi Shinobu Ohki Tadashi Shimizu |
| author_facet | Atsushi Goto Kenjiro Hashi Shinobu Ohki Tadashi Shimizu |
| author_sort | Atsushi Goto |
| collection | DOAJ |
| description | Abstract Optically induced nuclear spin–spin coupling in semiconductors is expected to serve for gate operations in nuclear-magnetic-resonance (NMR) quantum computations. However, not much is known about its characteristics. In this study, we investigate optically induced couplings in GaAs via double-resonance spin-echo decay experiments under optical pumping. The squared echo decay rate $$\left( {1/T_2} \right)^2$$ 1 / T 2 2 of 71Ga measured under various light powers revealed that optically induced couplings increase with increasing light power, and the sign of heteronuclear couplings between Ga–As pairs is opposite to that of dipolar couplings, which cancel each other out. Under higher light power, the optically induced “controllable” coupling is expected to eventually surpass the “uncontrollable” nuclear dipolar coupling, becoming dominant, which is preferable for the gate operation in NMR quantum computation. |
| first_indexed | 2024-04-13T18:51:35Z |
| format | Article |
| id | doaj.art-328fa02382064caa834ba15d1f3bb42e |
| institution | Directory Open Access Journal |
| issn | 2056-6387 |
| language | English |
| last_indexed | 2024-04-13T18:51:35Z |
| publishDate | 2022-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Information |
| spelling | doaj.art-328fa02382064caa834ba15d1f3bb42e2022-12-22T02:34:24ZengNature Portfolionpj Quantum Information2056-63872022-05-01811610.1038/s41534-022-00571-xOptically induced nuclear spin–spin couplings in GaAs manifested by spin echo decays under optical pumpingAtsushi Goto0Kenjiro Hashi1Shinobu Ohki2Tadashi Shimizu3National Institute for Materials ScienceNational Institute for Materials ScienceNational Institute for Materials ScienceNational Institute for Materials ScienceAbstract Optically induced nuclear spin–spin coupling in semiconductors is expected to serve for gate operations in nuclear-magnetic-resonance (NMR) quantum computations. However, not much is known about its characteristics. In this study, we investigate optically induced couplings in GaAs via double-resonance spin-echo decay experiments under optical pumping. The squared echo decay rate $$\left( {1/T_2} \right)^2$$ 1 / T 2 2 of 71Ga measured under various light powers revealed that optically induced couplings increase with increasing light power, and the sign of heteronuclear couplings between Ga–As pairs is opposite to that of dipolar couplings, which cancel each other out. Under higher light power, the optically induced “controllable” coupling is expected to eventually surpass the “uncontrollable” nuclear dipolar coupling, becoming dominant, which is preferable for the gate operation in NMR quantum computation.https://doi.org/10.1038/s41534-022-00571-x |
| spellingShingle | Atsushi Goto Kenjiro Hashi Shinobu Ohki Tadashi Shimizu Optically induced nuclear spin–spin couplings in GaAs manifested by spin echo decays under optical pumping npj Quantum Information |
| title | Optically induced nuclear spin–spin couplings in GaAs manifested by spin echo decays under optical pumping |
| title_full | Optically induced nuclear spin–spin couplings in GaAs manifested by spin echo decays under optical pumping |
| title_fullStr | Optically induced nuclear spin–spin couplings in GaAs manifested by spin echo decays under optical pumping |
| title_full_unstemmed | Optically induced nuclear spin–spin couplings in GaAs manifested by spin echo decays under optical pumping |
| title_short | Optically induced nuclear spin–spin couplings in GaAs manifested by spin echo decays under optical pumping |
| title_sort | optically induced nuclear spin spin couplings in gaas manifested by spin echo decays under optical pumping |
| url | https://doi.org/10.1038/s41534-022-00571-x |
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