Charge–Phase Duality and Cotunneling of Fluxons in SQUID-like Nanorings

Condensed Matter

article

Alex Latyshev¹  Andrew G. Semenov²  Andrei D. Zaikin² 

[1]Departement de Physique Theorique, Universite de Geneve

[2]National Research University Higher School of Economics

[3]I.E. Tamm Department of Theoretical Physics, P.N. Lebedev Physical Institute

关键词: charge–flux duality;    Josephson junction;    quantum phase slips;    cotunneling;   

DOI  :  10.3390/condmat8010005

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

Employing charge–flux duality for Josephson junctions and superconducting nanowires, we predict a novel effect of fluxon cotunneling in SQUID-like nanorings. This process is strictly dual to that of Cooper pair cotunneling in superconducting transistors formed by a pairs of Josephson tunnel junctions connected in series. Cooper pair cotunneling is known to lift Coulomb blockade in these structures at low temperatures. Likewise, fluxon cotunneling may eliminate the magnetic blockade of superconducting phase fluctuations in SQUID-like nanorings, driving them into an insulating state.

【 授权许可】

CC BY