Device Architecture for Coupling Spin Qubits Via an Intermediate Quantum State
Mesoscale and Nanoscale Physics
2018-10-31 v1 Quantum Physics
Abstract
We demonstrate a scalable device architecture that facilitates indirect exchange between singlet-triplet spin qubits, mediated by an intermediate quantum state. The device comprises five quantum dots, which can be independently loaded and unloaded via tunneling to adjacent reservoirs, avoiding charge latch-up common in linear dot arrays. In a step towards realizing two-qubit entanglement based on indirect exchange, the architecture permits precise control over tunnel rates between the singlet-triplet qubits and the intermediate state. We show that by separating qubits by 1 um, the residual capacitive coupling between them is reduced to 7 ueV.
Cite
@article{arxiv.1707.06479,
title = {Device Architecture for Coupling Spin Qubits Via an Intermediate Quantum State},
author = {X. G. Croot and S. J. Pauka and J. D. Watson and G. C. Gardner and S. Fallahi and M. J. Manfra and D. J. Reilly},
journal= {arXiv preprint arXiv:1707.06479},
year = {2018}
}