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Phys Rev Lett. 2011 Mar 4;106(9):094102. Epub 2011 Feb 28.

Signal amplification by sensitive control of bifurcation topology.

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1
Kavli Nanoscience Institute and Condensed Matter Physics, California Institute of Technology, Pasadena, 91125, USA.

Abstract

We describe a novel amplification scheme based on inducing dynamical changes to the topology of a bifurcation diagram of a simple nonlinear dynamical system. We have implemented a first bifurcation-topology amplifier using a coupled pair of parametrically driven high-frequency nanoelectromechanical systems resonators, demonstrating robust small-signal amplification. The principles that underlie bifurcation-topology amplification are simple and generic, suggesting its applicability to a wide variety of physical, chemical, and biological systems.

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