Voltage rectification by a SQUID ratchet

Details Voltage rectification by a SQUID ratchet Voltage rectification by a SQUID ratchet

1996-05-28

arxiv.org/abs/cond-mat/9605171v2

Physics

Condensed Matter

4 pages, 4 EPS figures, uses psfig.sty. Revised version, to appear in Physical Review Letters (26 August 1996)

Scientific paper

10.1103/PhysRevLett.77.2292

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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