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arXiv · 1602.01554

Strong coupling in multimode quantum electromechanics

Atsushi Noguchi·Rekishu Yamazaki·Manabu Ataka·Hiroyuki Fujita·Yutaka Tabuchi·Toyofumi Ishikawa·Koji Usami·Yasunobu Nakamura
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Abstract

Cavity electro-(opto-)mechanics allows us to access not only single isolated but also multiple mechanical modes in a massive object. Here we develop a multi-mode electromechanical system in which a several membrane vibrational modes are coupled to a three-dimensional loop-gap superconducting microwave cavity. The tight confinement of the electric field across a mechanically-compliant narrow-gap capacitor brings the system into the quantum strong coupling regime under a red-sideband pump field. We demonstrate strong coupling between two mechanical modes, which is induced by two-tone parametric drives and mediated by a virtual photon in the cavity. The tunable inter-mechanical-mode coupling can be used to generate entanglement between the mechanical modes.

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Atsushi Noguchi, Rekishu Yamazaki, Manabu Ataka, Hiroyuki Fujita, Yutaka Tabuchi, Toyofumi Ishikawa, Koji Usami, Yasunobu Nakamura. 2016-02-04. Strong coupling in multimode quantum electromechanics. https://arxiv.org/abs/1602.01554

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