Signal amplification by sensitive control of bifurcation topology

Phys Rev Lett. 2011 Mar 4;106(9):094102. doi: 10.1103/PhysRevLett.106.094102. Epub 2011 Feb 28.


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.