Broadband Lamb shift in an engineered quantum system

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Silveri, Matti Masuda, Shumpei Sevriuk, Vasilii Tan, Kuan Y. Jenei, Máté Hyyppä, Eric Hassler, Fabian Partanen, Matti Goetz, Jan Lake, Russell E. Grönberg, Leif Möttönen, Mikko 2019-04-02T06:56:02Z 2019-04-02T06:56:02Z 2019-06
dc.identifier.citation Silveri , M , Masuda , S , Sevriuk , V , Tan , K Y , Jenei , M , Hyyppä , E , Hassler , F , Partanen , M , Goetz , J , Lake , R E , Grönberg , L & Möttönen , M 2019 , ' Broadband Lamb shift in an engineered quantum system ' , Nature Physics , vol. 15 , no. 6 . en
dc.identifier.issn 1745-2473
dc.identifier.issn 1745-2481
dc.identifier.other PURE UUID: 9ce2540c-c639-42bb-963e-e0d02c53e4d5
dc.identifier.other PURE ITEMURL:
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dc.description | openaire: EC/H2020/681311/EU//QUESS | openaire: EC/H2020/795159/EU//NEQC
dc.description.abstract The shift of the energy levels of a quantum system owing to broadband electromagnetic vacuum fluctuations—the Lamb shift—has been central for the development of quantum electrodynamics and for the understanding of atomic spectra 1–6 . Identifying the origin of small energy shifts is still important for engineered quantum systems, in light of the extreme precision required for applications such as quantum computing 7,8 . However, it is challenging to resolve the Lamb shift in its original broadband case in the absence of a tuneable environment. Consequently, previous observations 1–5 , 9 in non-atomic systems are limited to environments comprising narrowband modes 10–12 . Here, we observe a broadband Lamb shift in high-quality superconducting resonators, a scenario also accessing static shifts inaccessible in Lamb’s experiment 1,2 . We measure a continuous change of several megahertz in the fundamental resonator frequency by externally tuning the coupling strength to the engineered broadband environment, which is based on hybrid normal-metal–insulator–superconductor tunnel junctions 13–15 . Our results may lead to improved control of dissipation in high-quality engineered quantum systems and open new possibilities for studying synthetic open quantum matter 16–18 using this hybrid experimental platform. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation info:eu-repo/grantAgreement/EC/H2020/795159/EU//NEQC
dc.relation.ispartofseries Nature Physics en
dc.rights openAccess en
dc.subject.other Physics and Astronomy(all) en
dc.subject.other 114 Physical sciences en
dc.title Broadband Lamb shift in an engineered quantum system en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Applied Physics
dc.contributor.department Quantum Computing and Devices
dc.contributor.department Centre of Excellence in Quantum Technology, QTF
dc.contributor.department Helsinki School of Economics
dc.contributor.department RWTH Aachen University
dc.contributor.department VTT Technical Research Centre of Finland
dc.subject.keyword Physics and Astronomy(all)
dc.subject.keyword 114 Physical sciences
dc.identifier.urn URN:NBN:fi:aalto-201904022483
dc.identifier.doi 10.1038/s41567-019-0449-0
dc.type.version publishedVersion

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