Circuit Nano-Electromechanics

Dr Hans-Gregor Huebl
Walther-Mei├čner-Institut, Garching, Germany
4 pm Wednesday 19 April 2017
CQC2T Conference Room, Level 2 Newton Building, UNSW

Micro- and nanomechanical elements are extensively studied due to their importance in force and mass sensing applications. To access their mechanical response, these vibrating elements are typically integrated into an electronic, electromagnetic, or optical environment. In cavity optomechanics, the interaction of a light field in an optical resonator with the mechanical degree of freedom goes beyond the sole readout functionality. Here, the light-matter interaction enables the manipulation of the mechanical state, manifesting itself e.g. in the form of a damped and amplified the mechanical motion [1]. This coupling concept can be straightforwardly transferred from the optical to the microwave (MW) regime defining the sub-field of circuit nano-electromechanics. Moreover, quantum information processing based on superconducting circuits is also at home in this frequency domain. Therefore, nano-electromechanics and superconducting quantum circuits use compatible technologies. This paves the way for true hybrid quantum nano-electromechanical systems that enable the investigation of quantum mechanics in the literal sense.

In my talk, I present a mechanical sensing approach for the investigation of solid-state properties in nano-sized systems, show implementations and consequences of the light-matter interaction in circuit nano-electromechanical systems, and discuss the physics of a hybrid combining superconducting quantum circuits with nanomechanical elements.

[1] M. Aspelmeyer, T. J. Kippenberg, and F. Marquardt, Rev. Mod. Phys. 86, 1391 (2014)