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<p>We demonstrate that the system of two connected in series resistively shunted Josephson nanojunctions may exhibit a novel quantum Coulomb drag effect mediated by cotunneling of Cooper pairs. In the Coulomb blockade regime, one of the junctions can develop a non-vanishing electric current while an external voltage bias is applied to another one. This phenomenon results from a non-trivial interplay between macroscopic quantum coherence, dissipation, and electron–electron interactions and can be directly tested in future experiments.</p>

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Quantum Coulomb Drag for Cooper Pairs

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月16日

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  • A. Latyshev,
  • A. G. Semenov,
  • A. D. Zaikin

摘要

We demonstrate that the system of two connected in series resistively shunted Josephson nanojunctions may exhibit a novel quantum Coulomb drag effect mediated by cotunneling of Cooper pairs. In the Coulomb blockade regime, one of the junctions can develop a non-vanishing electric current while an external voltage bias is applied to another one. This phenomenon results from a non-trivial interplay between macroscopic quantum coherence, dissipation, and electron–electron interactions and can be directly tested in future experiments.