期刊
NPJ QUANTUM INFORMATION
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41534-019-0225-0
关键词
-
类别
资金
- Army Research Office [W911NF-15-1-0149]
- DARPA [D18AC0025]
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF4535]
- Princeton Center for Complex Materials, a National Science Foundation MRSEC program [DMR-1420541]
Spin-based quantum processors in silicon quantum dots offer high-fidelity single and two-qubit operation. Recently multi-qubit devices have been realized; however, many-qubit demonstrations remain elusive, partly due to the limited qubit-to-qubit connectivity. These problems can be overcome by using SWAP gates, which are challenging to implement in devices having large magnetic field gradients. Here we use a primitive SWAP gate to transfer spin eigenstates in 100 ns with a fidelity of (F) over bar ((p))(SWAP) Ap = 98%. By swapping eigenstates we are able to demonstrate a technique for reading out and initializing the state of a double quantum dot without shuttling charges through the quantum dot. We then show that the SWAP gate can transfer arbitrary two-qubit product states in 300 ns with a fidelity of (F) over bar ((c))(SWAP)= 84%. This work sets the stage for many-qubit experiments in silicon quantum dots.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据