Ab initio simulation of spin-charge qubits based on bilayer graphene-WSe2 quantum dots
Abstract We propose a spin-charge qubit based on a bilayer graphene and WSe2 van der Waals heterostructure that together form a quantum dot and demonstrate its functionality from first-principles simulations. Electron and hole confinement as well as electrically controllable spin-orbit coupling (SOC...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-06-01
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| Series: | npj 2D Materials and Applications |
| Online Access: | https://doi.org/10.1038/s41699-025-00568-y |
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| author | Huaiyu Ge Peter Koopmann Filip Mrcarica Otto T. P. Schmidt Ilan Bouquet Mauro Dossena Mathieu Luisier Jiang Cao |
| author_facet | Huaiyu Ge Peter Koopmann Filip Mrcarica Otto T. P. Schmidt Ilan Bouquet Mauro Dossena Mathieu Luisier Jiang Cao |
| author_sort | Huaiyu Ge |
| collection | DOAJ |
| description | Abstract We propose a spin-charge qubit based on a bilayer graphene and WSe2 van der Waals heterostructure that together form a quantum dot and demonstrate its functionality from first-principles simulations. Electron and hole confinement as well as electrically controllable spin-orbit coupling (SOC) are modeled by self-consistently solving the Schrödinger and Poisson equations with material parameters extracted from density functional theory as inputs. In both electron and hole quantum dots, we find a two orders of magnitude enhancement of SOC (1.8 meV) compared to intrinsic graphene, in the layer directly adjacent to WSe2. Time-dependent investigations of the quantum device reveal rapid qubit gate operation in the order of picoseconds. Our simulations indicate that bilayer graphene and WSe2 heterostructures provide a promising platform for the processing of quantum information. |
| format | Article |
| id | doaj-art-9cb3830d161c4d5e9095c79a398d1d47 |
| institution | DOAJ |
| issn | 2397-7132 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj 2D Materials and Applications |
| spelling | doaj-art-9cb3830d161c4d5e9095c79a398d1d472025-08-20T03:21:06ZengNature Portfolionpj 2D Materials and Applications2397-71322025-06-019111310.1038/s41699-025-00568-yAb initio simulation of spin-charge qubits based on bilayer graphene-WSe2 quantum dotsHuaiyu Ge0Peter Koopmann1Filip Mrcarica2Otto T. P. Schmidt3Ilan Bouquet4Mauro Dossena5Mathieu Luisier6Jiang Cao7Integrated Systems Laboratory, ETH ZurichIntegrated Systems Laboratory, ETH ZurichIntegrated Systems Laboratory, ETH ZurichIntegrated Systems Laboratory, ETH ZurichIntegrated Systems Laboratory, ETH ZurichIntegrated Systems Laboratory, ETH ZurichIntegrated Systems Laboratory, ETH ZurichIntegrated Systems Laboratory, ETH ZurichAbstract We propose a spin-charge qubit based on a bilayer graphene and WSe2 van der Waals heterostructure that together form a quantum dot and demonstrate its functionality from first-principles simulations. Electron and hole confinement as well as electrically controllable spin-orbit coupling (SOC) are modeled by self-consistently solving the Schrödinger and Poisson equations with material parameters extracted from density functional theory as inputs. In both electron and hole quantum dots, we find a two orders of magnitude enhancement of SOC (1.8 meV) compared to intrinsic graphene, in the layer directly adjacent to WSe2. Time-dependent investigations of the quantum device reveal rapid qubit gate operation in the order of picoseconds. Our simulations indicate that bilayer graphene and WSe2 heterostructures provide a promising platform for the processing of quantum information.https://doi.org/10.1038/s41699-025-00568-y |
| spellingShingle | Huaiyu Ge Peter Koopmann Filip Mrcarica Otto T. P. Schmidt Ilan Bouquet Mauro Dossena Mathieu Luisier Jiang Cao Ab initio simulation of spin-charge qubits based on bilayer graphene-WSe2 quantum dots npj 2D Materials and Applications |
| title | Ab initio simulation of spin-charge qubits based on bilayer graphene-WSe2 quantum dots |
| title_full | Ab initio simulation of spin-charge qubits based on bilayer graphene-WSe2 quantum dots |
| title_fullStr | Ab initio simulation of spin-charge qubits based on bilayer graphene-WSe2 quantum dots |
| title_full_unstemmed | Ab initio simulation of spin-charge qubits based on bilayer graphene-WSe2 quantum dots |
| title_short | Ab initio simulation of spin-charge qubits based on bilayer graphene-WSe2 quantum dots |
| title_sort | ab initio simulation of spin charge qubits based on bilayer graphene wse2 quantum dots |
| url | https://doi.org/10.1038/s41699-025-00568-y |
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