Dynamical Backaction Evading Magnomechanics

RWTH Publications (RWTH Aachen)

Abstract

The interaction between magnons and mechanical vibrations dynamically modify the properties of the mechanical oscillator, such as its frequency and decay rate. Known as dynamical backaction, this effect is the basis for many theoretical protocols, such as entanglement generation or mechanical ground-state cooling. However, dynamical backaction is also detrimental for specific applications. Here, we demonstrate the implementation of a cavity magnomechanical measurement that fully evades dynamical backaction effects. Through careful engineering, the magnomechanical scattering rate into the hybrid magnon-photon modes can be precisely matched, eliminating dynamical backaction damping. Backaction evasion is confirmed via the measurement of a drive-power-independent mechanical linewidth.

Authors 5

1. C. A. Potts

   University of Alberta

   Affiliation as printed

   Department of Physics , University of Alberta , Edmonton , Alberta T6G 2E9 , Canada

2. Y. Huang

   University of Alberta

   Affiliation as printed

   Department of Physics , University of Alberta , Edmonton , Alberta T6G 2E9 , Canada

3. Victor A. S. V. Bittencourt

   Max Planck Institute for the Science of Light

   Affiliation as printed

   Max Planck Institute for the Science of Light , Staudtstr. 2 , 91058 Erlangen , Germany

4. Silvia Viola Kusminskiy Aachen Institute for Theoretical Solid State Physics

   Max Planck Institute for the Science of Light · RWTH Aachen University

   Affiliation as printed

   Institute for Theoretical Solid State Physics , RWTH Aachen University , 52074 Aachen , Germany

   Max Planck Institute for the Science of Light , Staudtstrasse 2 , 91058 Erlangen , Germany

5. J. P. Davis

   University of Alberta

   Affiliation as printed

   Department of Physics , University of Alberta , Edmonton , Alberta T6G 2E9 , Canada