Detection of Tiny Mechanical Motion by Means of the Ratchet Effect

Details Detection of Tiny Mechanical Motion by Means of the Ratchet Effect Detection of Tiny Mechanical Motion by Means of the Ratchet Effect

2009-01-08

arxiv.org/abs/0901.1009v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 9 figures

Scientific paper

We propose a position detection scheme for a nanoelectromechanical resonator based on the ratchet effect. This scheme has an advantage of being a dc measurement. We consider a three-junction SQUID where a part of the superconducting loop can perform mechanical motion. The response of the ratchet to a dc current is sensitive to the position of the resonator and the effect can be further enhanced by biasing the SQUID with an ac current. We discuss the feasibility of the proposed scheme in existing experimental setups.

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