Controllable Single Cooper Pair Splitting in Hybrid Quantum Dot Systems
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2022
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866929495111368704 |
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| author | de Jong, Damaz Prosko, Christian G. Han, Lin Malinowski, Filip K. Liu, Yu Kouwenhoven, Leo P. Pfaff, Wolfgang |
| author_facet | de Jong, Damaz Prosko, Christian G. Han, Lin Malinowski, Filip K. Liu, Yu Kouwenhoven, Leo P. Pfaff, Wolfgang |
| contents | Cooper pair splitters hold utility as a platform for investigating the entanglement of electrons in Cooper pairs, but probing splitters with voltage-biased Ohmic contacts prevents the retention of electrons from split pairs since they can escape to the drain reservoirs. We report the ability to controllably split and retain single Cooper pairs in a multi-quantum-dot device isolated from lead reservoirs, and separately demonstrate a technique for detecting the electrons emerging from a split pair. First, we identify a coherent Cooper pair splitting charge transition using dispersive gate sensing at GHz frequencies. Second, we utilize a double quantum dot as an electron parity sensor to detect parity changes resulting from electrons emerging from a superconducting island. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2208_05154 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Controllable Single Cooper Pair Splitting in Hybrid Quantum Dot Systems de Jong, Damaz Prosko, Christian G. Han, Lin Malinowski, Filip K. Liu, Yu Kouwenhoven, Leo P. Pfaff, Wolfgang Mesoscale and Nanoscale Physics Superconductivity Cooper pair splitters hold utility as a platform for investigating the entanglement of electrons in Cooper pairs, but probing splitters with voltage-biased Ohmic contacts prevents the retention of electrons from split pairs since they can escape to the drain reservoirs. We report the ability to controllably split and retain single Cooper pairs in a multi-quantum-dot device isolated from lead reservoirs, and separately demonstrate a technique for detecting the electrons emerging from a split pair. First, we identify a coherent Cooper pair splitting charge transition using dispersive gate sensing at GHz frequencies. Second, we utilize a double quantum dot as an electron parity sensor to detect parity changes resulting from electrons emerging from a superconducting island. |
| title | Controllable Single Cooper Pair Splitting in Hybrid Quantum Dot Systems |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2208.05154 |