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Voltage rectification by a SQUID ratchet

Ivar Zapata·Roland Bartussek·Fernando Sols·Peter Hänggi
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Abstract

We argue that the phase across an asymmetric dc SQUID threaded by a magnetic flux can experience an effective ratchet (periodic and asymmetric) potential. Under an external ac current, a rocking ratchet mechanism operates whereby one sign of the time derivative of the phase is favored. We show that there exists a range of parameters in which a fixed sign (and, in a narrower range, even a fixed value) of the average voltage across the ring occurs, regardless of the sign of the external current dc component.

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Ivar Zapata, Roland Bartussek, Fernando Sols, Peter Hänggi. 1996-07-31. Voltage rectification by a SQUID ratchet. https://doi.org/10.1103/physrevlett.77.2292

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