Lamb shift enhancement and detection in strongly driven superconducting circuits

It is shown that strong driving of a quantum system substantially enhances the Lamb shift induced by broadband reservoirs which are typical for solid-state devices. By varying drive parameters the impact of environmental vacuum fluctuations with continuous spectral distribution onto system observabl...

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Bibliographic Details
Published inarXiv.org
Main Authors Gramich, Vera, Gasparinetti, Simone, Solinas, Paolo, Ankerhold, Joachim
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 06.05.2014
Subjects
Broadband
Circuits
Environmental impact
Physics - Mesoscale and Nanoscale Physics
Physics - Quantum Physics
Quantum theory
Solid state devices
Superconductivity
Variations
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Summary:It is shown that strong driving of a quantum system substantially enhances the Lamb shift induced by broadband reservoirs which are typical for solid-state devices. By varying drive parameters the impact of environmental vacuum fluctuations with continuous spectral distribution onto system observables can be tuned in a distinctive way. This provides experimentally feasible measurement schemes for the Lamb shift in superconducting circuits based on Cooper pair boxes, where it can be detected either in shifted dressed transition frequencies or in pumped charge currents.
ISSN:2331-8422
DOI:10.48550/arxiv.1401.5396