Charge sensing the parity of an Andreev molecule
Fuente:
arXiv
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| Autores principales: | , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866912388257677312 |
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| author | van Driel, David Roovers, Bart Zatelli, Francesco Bordin, Alberto Wang, Guanzhong van Loo, Nick Wolff, Jan Cornelis Mazur, Grzegorz P. Gazibegovic, Sasa Badawy, Ghada Bakkers, Erik P. A. M. Kouwenhoven, Leo P. Dvir, Tom |
| author_facet | van Driel, David Roovers, Bart Zatelli, Francesco Bordin, Alberto Wang, Guanzhong van Loo, Nick Wolff, Jan Cornelis Mazur, Grzegorz P. Gazibegovic, Sasa Badawy, Ghada Bakkers, Erik P. A. M. Kouwenhoven, Leo P. Dvir, Tom |
| contents | The proximity effect of superconductivity on confined states in semiconductors gives rise to various bound states such as Andreev bound states (ABSs), Andreev molecules and Majorana zero modes. While such bound states do not conserve charge, their Fermion parity is a good quantum number. One way to measure parity is to convert it to charge first, which is then sensed. In this work, we sense the charge of ABSs and Andreev molecules in an InSb-Al hybrid nanowire using an integrated quantum dot operated as a charge sensor. We show how charge sensing measurements can resolve the even and odd states of an Andreev molecule, without affecting the parity. Such an approach can be further utilized for parity measurements of Majorana zero modes in Kitaev chains based on quantum dots. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_02001 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Charge sensing the parity of an Andreev molecule van Driel, David Roovers, Bart Zatelli, Francesco Bordin, Alberto Wang, Guanzhong van Loo, Nick Wolff, Jan Cornelis Mazur, Grzegorz P. Gazibegovic, Sasa Badawy, Ghada Bakkers, Erik P. A. M. Kouwenhoven, Leo P. Dvir, Tom Mesoscale and Nanoscale Physics The proximity effect of superconductivity on confined states in semiconductors gives rise to various bound states such as Andreev bound states (ABSs), Andreev molecules and Majorana zero modes. While such bound states do not conserve charge, their Fermion parity is a good quantum number. One way to measure parity is to convert it to charge first, which is then sensed. In this work, we sense the charge of ABSs and Andreev molecules in an InSb-Al hybrid nanowire using an integrated quantum dot operated as a charge sensor. We show how charge sensing measurements can resolve the even and odd states of an Andreev molecule, without affecting the parity. Such an approach can be further utilized for parity measurements of Majorana zero modes in Kitaev chains based on quantum dots. |
| title | Charge sensing the parity of an Andreev molecule |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2311.02001 |