Author(s): Daniil S. Antonenko, Pavel D. Kurilovich, Francisco J. Matute-Cañadas, and Leonid I. Glazman We evaluate the quasiparticle contribution to the frequency shift and relaxation rates of a transmon with the Josephson junctions connecting superconductors that have unequal energy gaps. The gap difference substantially affects the transmon characteristics. We investigate their dependence on the de… [Phys. Rev. B 113, 054504] Published Mon Feb 02, 2026