Ab initio Simulation of Spin-Charge Qubits based on Bilayer Graphene-WSe₂ Quantum Dots
Author / Producer
Date
2025
Publication Type
Journal Article
ETH Bibliography
yes
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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 adja- cent 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.
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Publication status
published
External links
Editor
Book title
Journal / series
Volume
9 (1)
Pages / Article No.
47
Publisher
Nature
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Quantum dot; two-dimensional materials; two-dimensional material; ab initio modeling; qubit; van der Waals heterostructure
Organisational unit
02636 - Institut für Integrierte Systeme / Integrated Systems Laboratory
Notes
Th accepted version was first published with license in copyright.
Funding
--- - NCCR MARVEL Agility Plus Projekt (SNF)
180604 - NCCR SPIN (SNF)
180604 - NCCR SPIN (SNF)
Related publications and datasets
Is supplemented by: https://doi.org/10.3929/ethz-b-000731746