Stimulated Raman adiabatic passage in a three-level superconducting circuit

Kumar, K.S., Vepsäläinen, A., Danilin, S. and Paraoanu, G.S. (2016) Stimulated Raman adiabatic passage in a three-level superconducting circuit. Nature Communications, 7, 10628. (doi: 10.1038/ncomms10628) (PMID:26902454) (PMCID:PMC4766393)

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The adiabatic manipulation of quantum states is a powerful technique that opened up new directions in quantum engineering—enabling tests of fundamental concepts such as geometrical phases and topological transitions, and holding the promise of alternative models of quantum computation. Here we benchmark the stimulated Raman adiabatic passage for circuit quantum electrodynamics by employing the first three levels of a transmon qubit. In this ladder configuration, we demonstrate a population transfer efficiency >80% between the ground state and the second excited state using two adiabatic Gaussian-shaped control microwave pulses. By doing quantum tomography at successive moments during the Raman pulses, we investigate the transfer of the population in time domain. Furthermore, we show that this protocol can be reversed by applying a third adiabatic pulse, we study a hybrid nondiabatic–adiabatic sequence, and we present experimental results for a quasi-degenerate intermediate level.

Item Type:Articles
Additional Information:The authors acknowledge financial support from FQXi, Väisalä Foundation, the Academy of Finland (project 263457) and the Center of Excellence ‘Low Temperature Quantum Phenomena and Devices’ (project 250280).
Glasgow Author(s) Enlighten ID:Danilin, Dr Sergey
Authors: Kumar, K.S., Vepsäläinen, A., Danilin, S., and Paraoanu, G.S.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Nature Communications
Publisher:Nature Publishing Group
ISSN (Online):2041-1723
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Nature Communications 7: 10628
Publisher Policy:Reproduced under a Creative Commons License

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