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Rectification in a Stochastically Driven Three-Junction SQUID Rocking Ratchet

A. Sterck, D. Koelle, R. Kleiner

DOI 10.1103/PhysRevLett.103.047001 · Physical Review Letters

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Abstract

A three-junction SQUID forms a rocking ratchet for the phase differences across the Josephson junctions. In this Letter we investigate its capability to rectify voltages under stochastic drive currents with a white frequency spectrum up to a cutoff frequency fcut. Experimentally, we accessed the adiabatic regime and find very good agreement with theory. Numerically, we also investigated large values of fcut and find, in agreement with the laws of thermodynamics, that the response disappears, as fcut becomes much larger than the characteristic frequency scales of the system.

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FormulaReported Tc (K)Pressure (GPa)Type
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—Pressure not reportedunknown

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