Optimized cavity-mediated dispersive two-qubit gates between spin qubits
- The recent realization of a coherent interface between a single electron in a silicon quantum dot and a single photon trapped in a superconducting cavity opens the way for implementing photon-mediated two-qubit entangling gates. In order to couple a spin to the cavity electric field, some type of spin-charge hybridization is needed, which impacts spin control and coherence. In this work we propose a cavity-mediated two-qubit gate and calculate cavity-mediated entangling gate fidelities in the dispersive regime, accounting for errors due to the spin-charge hybridization, as well as photon- and phonon-induced decays. By optimizing the degree of spin-charge hybridization, we show that two-qubit gates mediated by cavity photons are capable of reaching fidelities exceeding 90% in present-day device architectures. High iswap gate fidelities are achievable even in the presence of charge noise at the level of 2μeV.
| Author: | Mónica BenitoORCiDGND, Jason R. Petta, Guido Burkard |
|---|---|
| URN: | urn:nbn:de:bvb:384-opus4-1042833 |
| Frontdoor URL | https://opus.bibliothek.uni-augsburg.de/opus4/104283 |
| ISSN: | 2469-9969OPAC |
| Parent Title (English): | Physical Review B |
| Publisher: | American Physical Society (APS) |
| Place of publication: | College Park, MD |
| Type: | Article |
| Language: | English |
| Year of first Publication: | 2019 |
| Publishing Institution: | Universität Augsburg |
| Release Date: | 2023/05/10 |
| Volume: | 100 |
| First Page: | 081412(R) |
| DOI: | https://doi.org/10.1103/PhysRevB.100.081412 |
| Institutes: | Mathematisch-Naturwissenschaftlich-Technische Fakultät |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik | |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Professur für Quantencomputing und Quantengeräte | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Licence (German): |  Deutsches Urheberrecht |
