Transmon qubit using Sn as a junction superconductor

Gatemon-like transmon using an InAs nanowire with a $\beta$-Sn superconducting shell, demonstrating that hybrid-junction coherence depends strongly on the materials stack.

Key Results

• Gate tuning over a 3 GHz qubit-frequency range.
• Maximum $T_1=27\mu \text{s}$.
• Maximum echo $T_2=1.8\mu \text{s}$, reached at a different bias from maximum $T_1$.

Links

• arXiv: 2508.04007

Zoo Links

• gatemon
• transmon