Classical analog of St\"uckelberg interferometry with two coupled mechanical resonators

TL;DR

This paper demonstrates a classical analog of St"uckelberg interferometry using two coupled mechanical resonators, revealing quantum-like interference phenomena in a macroscopic classical system.

Contribution

It constructs a St"uckelberg interferometer with coupled cantilevers and analyzes the non-adiabatic phase, establishing a classical-quantum analogy in mechanical systems.

Findings

Observation of Landau-Zener transitions in classical resonators

Measurement of non-adiabatic phase in a classical system

Establishment of a classical analog to quantum interferometry

Abstract

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.