PETER L. HAGELSTEIN is an associate professor in the Department of Electrical Engineering and Computer Science at MIT. He is a principal investigator in the Optics and Quantum Electronics Group of the Research Laboratory of Electronics. STEPHEN D. SENTURIA formerly held the Barton L. Weller Chair in Electrical Engineering at MIT. He retired in 2002, and currently serves as Chairman and Chief Technology Officer of Polychromix, Inc. in Woburn, Massachusetts. He is Senior Editor of the ASME/IEEE Journal of Microelectromechanical Systems. TERRY P. ORLANDO is a professor of electrical engineering and principal investigator at the Research Laboratory of Electronics at MIT. His research focuses on… superconducting circuits for quantum computation and nonlinear dynamics.