Classical analog of St\"uckelberg interferometry with two coupled   mechanical resonators
  Coupled nanomechanical resonators have recently attracted much attention for both fundamental studies in physics and broad applications in high-precession detection or sensing. By studying the Landau-Zener transitions and Rabi oscillation of two coupled resonators, it has been shown that such a two-mode system acts as a classical two-level system bearing the analog to a quantum mechanical two-level one. Here we construct a St\"uckelberg interferometer with two coupled cantilevers by driving the system through the avoided crossing twice. By measuring the non-adiabatic phase acquired at the Landau-Zener transition, we unveil an in-depth analog between the two-mode and quantum two-level systems. Our study opens up new opportunities for constructing interferometers with classical devices. 
Hao Fu, Zhi-cheng Gong, Tian-hua Mao, Chang-pu Sun, Su Yi, Yong Li,   and Geng-yu Cao
cond-mat.mes-hall quant-ph