Aharonov-Casher Effect and the Coherent Flux Tunneling in the Hybrid Charge Quantum Interference Device

J. W. Dunstan; R. Shaikhaidarov; K. H. Kim; A. Shesterikov; I. Antonov; S. Linzen; E. V. Il'ichev; V. N. Antonov; O. V. Astafiev

arXiv · 2601.06682

Aharonov-Casher Effect and the Coherent Flux Tunneling in the Hybrid Charge Quantum Interference Device

J. W. Dunstan·R. Shaikhaidarov·K. H. Kim·A. Shesterikov·I. Antonov·S. Linzen·E. V. Il'ichev·V. N. Antonov·O. V. Astafiev

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Abstract

By exploiting the Aharonov-Casher effect we demonstrate a suppression of magnetic flux tunneling in a Hybrid Charge Quantum Interference Device. The main part of this device is two Josephson junctions with a small superconducting island between them. To minimize phase fluctuations across Josephson junctions, this structure is embedded in a compact super-inductive NbN loop. The Interference between the flux tunneling paths is determined by the island-induced charge, which is controlled by an external voltage. The charge sensitive operation of the device is subjected to poisoning by the quasiparticles generated in the NbN film.

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J. W. Dunstan, R. Shaikhaidarov, K. H. Kim, A. Shesterikov, I. Antonov, S. Linzen, E. V. Il'ichev, V. N. Antonov, O. V. Astafiev. 2026-01-10. Aharonov-Casher Effect and the Coherent Flux Tunneling in the Hybrid Charge Quantum Interference Device. https://arxiv.org/abs/2601.06682

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