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High-fidelity quantum sensing of magnon excitations with a single electron spin in quantum dots

Authors :
Le-Tian Zhu
Tao Tu
Ao-Lin Guo
Chuan-Feng Li
Source :
Chinese Physics B. 31:120302
Publication Year :
2022
Publisher :
IOP Publishing, 2022.

Abstract

Single-electron spins in quantum dots are the leading platform for qubits, while magnons in solids are one of the emerging candidates for quantum technologies. How to manipulate a composite system composed of both systems is an outstanding challenge. Here, we use spin–charge hybridization to effectively couple the single-electron spin state in quantum dots to the cavity and further to the magnons. Through this coupling, quantum dots can entangle and detect magnon states. The detection efficiency can reach 0.94 in a realistic experimental situation. We also demonstrate the electrical tunability of the scheme for various parameters. These results pave a practical pathway for applications of composite systems based on quantum dots and magnons.

Subjects

Subjects :
General Physics and Astronomy

Details

ISSN :
16741056
Volume :
31
Database :
OpenAIRE
Journal :
Chinese Physics B
Accession number :
edsair.doi...........3e9e31706f2d5f5f8bace7c4e03004ab