Speaker
Description
Coupled nanomechanical systems provide versatile experimental and theoretical platforms for exploring classical-to-quantum analogies, nonlinear dynamics, and quantum phenomena. One particularly important topic is the generation of squeezed states in mechanical oscillators, where quadrature fluctuations are reduced below the standard quantum limit [1-2]. In this work, we experimentally demonstrate dissipative squeezing in a system of two capacitively coupled drum electromechanical resonators by simultaneously pumping the red and blue sidebands of one resonator. By monitoring the quadrature variances of both coupled mechanical modes at room temperature, we observe signatures of steady-state squeezing. We further analyze the achievable minimum squeezing level and elucidate its underlying mechanism by comparing it with the fundamental limits imposed in conventional parametric pumping schemes.
Reference:
[1] A. Vinante et al., Phys. Rev. Lett. 111, 207203 (2013)
[2] E. E. Wollman, et al., Science 349, 952 (2015).