--- res: bibo_abstract: - Recent technical developments in the fields of quantum electromechanics and optomechanics have spawned nanoscale mechanical transducers with the sensitivity to measure mechanical displacements at the femtometre scale and the ability to convert electromagnetic signals at the single photon level. A key challenge in this field is obtaining strong coupling between motion and electromagnetic fields without adding additional decoherence. Here we present an electromechanical transducer that integrates a high-frequency (0.42 GHz) hypersonic phononic crystal with a superconducting microwave circuit. The use of a phononic bandgap crystal enables quantum-level transduction of hypersonic mechanical motion and concurrently eliminates decoherence caused by acoustic radiation. Devices with hypersonic mechanical frequencies provide a natural pathway for integration with Josephson junction quantum circuits, a leading quantum computing technology, and nanophotonic systems capable of optical networking and distributing quantum information.@eng bibo_authorlist: - foaf_Person: foaf_givenName: Mahmoud foaf_name: Kalaee, Mahmoud foaf_surname: Kalaee - foaf_Person: foaf_givenName: Mohammad foaf_name: Mirhosseini, Mohammad foaf_surname: Mirhosseini - foaf_Person: foaf_givenName: Paul B. foaf_name: Dieterle, Paul B. foaf_surname: Dieterle - foaf_Person: foaf_givenName: Matilda foaf_name: Peruzzo, Matilda foaf_surname: Peruzzo foaf_workInfoHomepage: http://www.librecat.org/personId=3F920B30-F248-11E8-B48F-1D18A9856A87 orcid: 0000-0002-3415-4628 - foaf_Person: foaf_givenName: Johannes M foaf_name: Fink, Johannes M foaf_surname: Fink foaf_workInfoHomepage: http://www.librecat.org/personId=4B591CBA-F248-11E8-B48F-1D18A9856A87 orcid: 0000-0001-8112-028X - foaf_Person: foaf_givenName: Oskar foaf_name: Painter, Oskar foaf_surname: Painter bibo_doi: 10.1038/s41565-019-0377-2 bibo_issue: '4' bibo_volume: 14 dct_date: 2019^xs_gYear dct_identifier: - UT:000463195700014 dct_isPartOf: - http://id.crossref.org/issn/1748-3387 - http://id.crossref.org/issn/1748-3395 dct_language: eng dct_publisher: Springer Nature@ dct_title: Quantum electromechanics of a hypersonic crystal@ ...