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Paper Abstract and Keywords
Presentation 2013-10-02 16:55
Large dispersive shift observed in a superconducting circuit-QED system
Kunihiro Inomata (RIKEN), Tsuyoshi Yamamoto (NEC), Pierre-Marie Billangeon (RIKEN), Yasunobu Nakamura (Univ. of Tokyo), Jaw-Shen Tsai (RIKEN) SCE2013-27 Link to ES Tech. Rep. Archives: SCE2013-27
Abstract (in Japanese) (See Japanese page) 
(in English) We demonstrate enhancement of the dispersive frequency shift in a coplanar waveguide resonator induced by a capacitively-coupled superconducting flux qubit in the straddling regime.
The magnitude of the observed shift, 80~MHz for the qubit-resonator detuning
of 5~GHz, is quantitatively explained by the generalized Rabi model which takes into account the contribution of the qubit higher energy levels.
By applying the enhanced dispersive shift to the qubit readout, we achieved 90$%$ contrast of the Rabi oscillations
which is mainly limited by the energy relaxation of the qubit.
Keyword (in Japanese) (See Japanese page) 
(in English) superconducting flux qubit / superconducting resonator / dispersive shift / / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 232, SCE2013-27, pp. 43-47, Oct. 2013.
Paper # SCE2013-27 
Date of Issue 2013-09-25 (SCE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF SCE2013-27 Link to ES Tech. Rep. Archives: SCE2013-27

Conference Information
Committee SCE  
Conference Date 2013-10-02 - 2013-10-03 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku University, RIEC 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Superconducting sensing technologies and their applications, etc. 
Paper Information
Registration To SCE 
Conference Code 2013-10-SCE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Large dispersive shift observed in a superconducting circuit-QED system 
Sub Title (in English)  
Keyword(1) superconducting flux qubit  
Keyword(2) superconducting resonator  
Keyword(3) dispersive shift  
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1st Author's Name Kunihiro Inomata  
1st Author's Affiliation The Institute of Physical and Chemical Research (RIKEN)
2nd Author's Name Tsuyoshi Yamamoto  
2nd Author's Affiliation NEC Corporation (NEC)
3rd Author's Name Pierre-Marie Billangeon  
3rd Author's Affiliation The Institute of Physical and Chemical Research (RIKEN)
4th Author's Name Yasunobu Nakamura  
4th Author's Affiliation The University of Tokyo (Univ. of Tokyo)
5th Author's Name Jaw-Shen Tsai  
5th Author's Affiliation The Institute of Physical and Chemical Research (RIKEN)
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Speaker Author-1 
Date Time 2013-10-02 16:55:00 
Presentation Time 25 minutes 
Registration for SCE 
Paper # SCE2013-27 
Volume (vol) vol.113 
Number (no) no.232 
Page pp.43-47 
#Pages
Date of Issue 2013-09-25 (SCE) 


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