Quantum dot devices with magnetic gates
US12342733B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2022 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | Jul 30, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N69/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An array of spin qubits relies on a gradient magnetic field to ensure that the qubits are separated in frequency in order to be individually addressable. Furthermore, a strong magnetic field gradient is required to electrically drive the EDSR of the qubits. Quantum dot devices and related methods and systems that integrate magnetic materials in the gates to provide a gradient magnetic field are disclosed. Magnetic materials in different gates may be of different heights to improve frequency separation of neighboring qubits. Unlike previous approaches to quantum dot formation and manipulation, various embodiments of the quantum dot devices disclosed herein may enable improved control over magnetic fields and their gradients to realize better frequency targeting of individual qubits, help minimize adverse effects of charge noise on qubit decoherence and provide good scalability in the number of quantum dots included in the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.