Interfacing planar superconducting qubits with high overtone bulk acoustic phonons

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Abstract

Mechanical resonators are a promising way for interfacing qubits in order to realize hybrid quantum systems that offer great possibilities for applications. Mechanical systems can have very long energy lifetimes, and they can be further interfaced to other systems. Moreover, integration of a mechanical oscillator with qubits creates a potential platform for the exploration of quantum physics in macroscopic mechanical degrees of freedom. The utilization of high overtone bulk acoustic resonators coupled to superconducting qubits is an intriguing platform towards these goals. These resonators exhibit a combination of high-frequency and high-quality factors. They can reach their quantum ground state at dilution refrigeration temperatures and they can be strongly coupled to superconducting qubits via their piezoelectric effect. In this paper, we demonstrate our system where bulk acoustic phonons of a high overtone resonator are coupled to a transmon qubit in a planar circuit architecture. We show that the bulk acoustic phonons are interacting with the qubit in a simple design architecture at the quantum level, representing further progress towards the quantum control of mechanical motion.

Original languageEnglish
Article number205443
Pages (from-to)1-6
JournalPhysical Review B
Volume97
Issue number20
DOIs
Publication statusPublished - 29 May 2018
MoE publication typeA1 Journal article-refereed

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  • HOT: Hybrid Optomechanical Technologies

    Sillanpää, M. (Principal investigator)

    01/01/201730/06/2021

    Project: EU: Framework programmes funding

  • Centre of Excellence in Low Temperature Quantum Phenomena and Devices

    Sillanpää, M. (Principal investigator)

    01/01/201531/12/2017

    Project: Academy of Finland: Other research funding

  • CAVITYQPD: Cavity quantum phonon dynamics

    Välimaa, A. (Project Member), Ockeloen-Korppi, C. (Project Member), Santos, J. T. (Project Member), Damskägg, E. (Project Member), Sillanpää, M. (Principal investigator), Rissanen, I. (Project Member), Kervinen, M. (Project Member), Brandt, M. (Project Member), Sulkko, J. (Project Member), Pirkkalainen, J.-M. (Project Member), Zhou, J. (Project Member), Mahato, S. (Project Member), Mercier de Lepinay, L. (Project Member), Mishra, H. (Project Member), Wang, C. (Project Member), Tong, F. (Project Member) & Crump, W. (Project Member)

    20/11/201431/12/2020

    Project: EU: ERC grants

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