Work

Coherent control of spinmons

Year: 2026

Type: preprint

Abstract: In this work, we explore a hybrid qubit device where quantum information is encoded by quantum states of a transmon entangled with the spin of a trapped Andreev quasiparticle. We term such devices spinmons. We lift the spinmon Kramers degeneracy by introducing a Zeeman field and develop two routes for full qubit control via electrostatic gates and an AC flux drive, providing multiple directions for experimental implementations. Finally, we compute coherence times, verify the qubit robustness against flux, charge and gate voltage noise sources, and discuss the role of nuclear spin noise.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2605.12588

Authors: Tjernshaugen, Johanne Bratland, Boström, Florinda Viñas, Danon, Jeroen, Linder, Jacob, Flensberg, Karsten, Manesco, Antonio L. R.

Institutions: University of Copenhagen, Norwegian University of Science and Technology

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: European Commission, Norges Forskningsråd, HORIZON EUROPE Framework Programme, H2020 European Research Council

Awards: G2165927803, G3723448086, G5450083688, Foundations of nonlocal and nonabelian condensed-matter systems

OpenAlex ID: W7161122657

Cites: 41

Cited by: 2

Related to: 10