Quantum Coulomb Drag Mediated by Cotunneling of Fluxons and Cooper Pairs.

• Tác giả: Alex Latyshev, Andrew G Semenov, Andrei D Zaikin
• Ngôn ngữ: eng
• Ký hiệu phân loại: 658.404 Project management
• Thông tin xuất bản: United States : Physical review letters , 2025
• Bộ sưu tập: NCBI
• ID: 707574

Tóm tắt

We predict two novel quantum drag effects which can occur in macroscopically quantum coherent Josephson circuits. We demonstrate that biasing one resistively shunted Josephson junction by an external current one can induce a nonzero voltage drop across another such junction capacitively coupled to the first one. This quantum Coulomb drag is caused by cotunneling of magnetic flux quanta across both junctions which remain in the "superconducting" regime. Likewise, Cooper pair cotunneling across a pair of connected in series Josephson junctions in the "insulating" regime is responsible for another-dual-quantum Coulomb drag effect.