Two coupled Josephson junctions: dc voltage controlled by biharmonic current

Details Two coupled Josephson junctions: dc voltage controlled by biharmonic current Two coupled Josephson junctions: dc voltage controlled by biharmonic current

2011-10-24

arxiv.org/abs/1110.5287v3

J. Phys. Condens. Matter 24, 085702 (2012)

Physics

Condensed Matter

Statistical Mechanics

15 pages, 7 figures, to appear in J. Phys. Condens. Matter (2012)

Scientific paper

10.1088/0953-8984/24/8/085702

We study transport properties of two Josephson junctions coupled by an external shunt resistance. One of the junction (say, the first) is driven by an unbiased ac current consisting of two harmonics. The device can rectify the ac current yielding a dc voltage across the first junction. For some values of coupling strength, controlled by an external shunt resistance, a dc voltage across the second junction can be generated. By variation of system parameters like the relative phase or frequency of two harmonics, one can conveniently manipulate both voltages with high efficiency, e.g., changing the dc voltages across the first and second junctions from positive to negative values and vice versa.

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