A Farey staircase from the two-extremum return map of a Josephson junction
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作者:
Botha, A. E.
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Univ S Africa, Dept Phys, Sci Campus,Private Bag X6, ZA-1710 Florida Pk, South AfricaUniv S Africa, Dept Phys, Sci Campus,Private Bag X6, ZA-1710 Florida Pk, South Africa
Botha, A. E.
[1
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Shukrinov, Yu. M.
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Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Moscow Region, RussiaUniv S Africa, Dept Phys, Sci Campus,Private Bag X6, ZA-1710 Florida Pk, South Africa
Shukrinov, Yu. M.
[2
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Kolahchi, M. R.
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Inst Adv Studies Basic Sci, Dept Phys, Zanjan 451951159, IranUniv S Africa, Dept Phys, Sci Campus,Private Bag X6, ZA-1710 Florida Pk, South Africa
Kolahchi, M. R.
[3
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机构:
[1] Univ S Africa, Dept Phys, Sci Campus,Private Bag X6, ZA-1710 Florida Pk, South Africa
[2] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Moscow Region, Russia
We report the presence of a Farey staircase in the simulated current-voltage characteristics between the second and third harmonic steps of an underdamped Josephson junction under external electromagnetic radiation. The steps constituting the staircase are interrupted by chaotic intervals. The dynamics is due to a two-extremum return map and is not associated with phase locking on an invariant torus. On decreasing the current, the third harmonic step ends in the bifurcation known as blue-sky catastrophe.