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    Transient triplet blockade in Andreev junction

    R. Taranko1, J. Barański2, A. Jankiewicz3, K. Wrześniewski3, I. Weymann3, and T. Domański1,*

    • *Contact author: doman@kft.umcs.lublin.pl

    Phys. Rev. B 114, 045407 – Published 8 July, 2026

    DOI: https://doi.org/10.1103/53lx-89t1

    Abstract

    We study the time-dependent triplet configuration, appearing under nonequilibrium conditions in a nanoscopic junction with two quantum dots (QDs) coupled in series between superconductor and normal metallic lead. We show that, in the situation when both QDs are singly occupied by identical spin electrons, the on-dot electron pairing is suppressed, which substantially affects the subgap charge transport. We investigate processes in which such a configuration can be temporarily encountered, either due to the initial conditions or by imposing the external magnetic field. Our analytical and numerical calculations provide estimations for the temporal scales, characterizing the evolution of the triplet configuration which could be manifested in the time-resolved tunneling measurements. Such nonequilibrium features of the triplet configuration might be relevant to operations on superconducting qubits, in their conventional and/or topological realizations.

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