Highly tunable exchange-only singlet-only qubit in a GaAs triple quantum dot
We propose an implementation of a singlet-only spin qubit in a GaAs-based triple quantum dot with a (1, 4, 1) charge occupation. In the central multielectron dot, the interplay between Coulomb interaction and an out-of-plane magnetic field creates an energy spectrum with a tunable singlet-triplet sp...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2020-03-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.012062 |
| _version_ | 1797211517521756160 |
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| author | Arnau Sala Jørgen Holme Qvist Jeroen Danon |
| author_facet | Arnau Sala Jørgen Holme Qvist Jeroen Danon |
| author_sort | Arnau Sala |
| collection | DOAJ |
| description | We propose an implementation of a singlet-only spin qubit in a GaAs-based triple quantum dot with a (1, 4, 1) charge occupation. In the central multielectron dot, the interplay between Coulomb interaction and an out-of-plane magnetic field creates an energy spectrum with a tunable singlet-triplet splitting, which can be exploited to create a six-particle singlet-only qubit with a qubit splitting that can straightforwardly be tuned over tens of μeV by adjusting the external magnetic field. We confirm the full exchange-based electric control of the qubit and demonstrate its superior coherence properties due to its singlet-only nature. |
| first_indexed | 2024-04-24T10:27:45Z |
| format | Article |
| id | doaj.art-1dd54211659a40e1a63cff37d2e351ae |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:27:45Z |
| publishDate | 2020-03-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-1dd54211659a40e1a63cff37d2e351ae2024-04-12T16:51:25ZengAmerican Physical SocietyPhysical Review Research2643-15642020-03-012101206210.1103/PhysRevResearch.2.012062Highly tunable exchange-only singlet-only qubit in a GaAs triple quantum dotArnau SalaJørgen Holme QvistJeroen DanonWe propose an implementation of a singlet-only spin qubit in a GaAs-based triple quantum dot with a (1, 4, 1) charge occupation. In the central multielectron dot, the interplay between Coulomb interaction and an out-of-plane magnetic field creates an energy spectrum with a tunable singlet-triplet splitting, which can be exploited to create a six-particle singlet-only qubit with a qubit splitting that can straightforwardly be tuned over tens of μeV by adjusting the external magnetic field. We confirm the full exchange-based electric control of the qubit and demonstrate its superior coherence properties due to its singlet-only nature.http://doi.org/10.1103/PhysRevResearch.2.012062 |
| spellingShingle | Arnau Sala Jørgen Holme Qvist Jeroen Danon Highly tunable exchange-only singlet-only qubit in a GaAs triple quantum dot Physical Review Research |
| title | Highly tunable exchange-only singlet-only qubit in a GaAs triple quantum dot |
| title_full | Highly tunable exchange-only singlet-only qubit in a GaAs triple quantum dot |
| title_fullStr | Highly tunable exchange-only singlet-only qubit in a GaAs triple quantum dot |
| title_full_unstemmed | Highly tunable exchange-only singlet-only qubit in a GaAs triple quantum dot |
| title_short | Highly tunable exchange-only singlet-only qubit in a GaAs triple quantum dot |
| title_sort | highly tunable exchange only singlet only qubit in a gaas triple quantum dot |
| url | http://doi.org/10.1103/PhysRevResearch.2.012062 |
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