Macroscopic quantum tunneling of phase-locked fluxons in coupled long Josephson junctions
Ju H. Kim, Kyungsun Moon
DOI 10.1103/PhysRevB.71.104524 · Physical Review B
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Abstract
Macroscopic quantum tunneling of phase-locked fluxon-fluxon (FF) and fluxon-antifluxon (FAF) pairs from a metastable state in two inductively coupled long Josephson junctions is investigated. We show that, in the absence of a magnetic field, the fluxons in the FF pair and the fluxon and antifluxon in the FAF pair tunnel as independent particles when the magnetic induction effect is weaker than the pinning effect due to columnar defects. However, the FAF pair tunnel coherently as a single quantum particle when the magnetic induction effect becomes stronger. We show that the tunneling rate is modified by the magnetic induction effect.
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| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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