Decoherence suppression in quantum systems 2008

202 Pages·2009·1.28 MB·English

by  Mikio Nakahara

Decoherence Suppression
in Quantum Systems
2008
7653.TP.indd 1 10/12/09 11:21:39 AM
Kinki University Series on Quantum Computing
Editor-in-Chief: Mikio Nakahara (Kinki University, Japan)
ISSN: 1793-7299
Published
Vol. 1 Mathematical Aspects of Quantum Computing 2007
edited by Mikio Nakahara, Robabeh Rahimi (Kinki Univ., Japan) &
Akira SaiToh (Osaka Univ., Japan)
Vol. 2 Molecular Realizations of Quantum Computing 2007
edited by Mikio Nakahara, Yukihiro Ota, Robabeh Rahimi, Yasushi Kondo &
Masahito Tada-Umezaki (Kinki Univ., Japan)
Vol. 3 Decoherence Suppression in Quantum Systems 2008
edited by Mikio Nakahara, Robabeh Rahimi & Akira SaiToh
(Kinki Univ., Japan)
ZhangJi - Decoherence Suppression.pmd 2 10/22/2009, 11:19 AM
Kinki University Series on Quantum Computing – Vol. 3
editors
Mikio Nakahara
Robabeh Rahimi
Akira SaiToh
Kinki University, Japan
Decoherence Suppression
in Quantum Systems
2008
World Scientific
NEW JERSEY • LONDON • SINGAPORE • BEIJING • SHANGHAI • HONG KONG • TAIPEI • CHENNAI
7653.TP.indd 2 10/12/09 11:21:43 AM
Published by
World Scientific Publishing Co. Pte. Ltd.
5 Toh Tuck Link, Singapore 596224
USA office: 27 Warren Street, Suite 401-402, Hackensack, NJ 07601
UK office: 57 Shelton Street, Covent Garden, London WC2H 9HE
British Library Cataloguing-in-Publication Data
A catalogue record for this book is available from the British Library.
DECOHERENCE SUPPRESSION IN QUANTUM SYSTEMS 2008
Proceedings of the Symposium
Copyright © 2010 by World Scientific Publishing Co. Pte. Ltd.
All rights reserved. This book, or parts thereof, may not be reproduced in any form or by any means,
electronic or mechanical, including photocopying, recording or any information storage and retrieval
system now known or to be invented, without written permission from the Publisher.
For photocopying of material in this volume, please pay a copying fee through the Copyright
Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA 01923, USA. In this case permission to
photocopy is not required from the publisher.
ISBN-13 978-981-4295-83-3
ISBN-10 981-4295-83-3
Printed in Singapore.
ZhangJi - Decoherence Suppression.pmd 1 10/22/2009, 11:19 AM
October19,2009 11:29 WSPC-ProceedingsTrimSize:9inx6in proceedings
v
PREFACE
This volume contains lecture notes and a paper contributed from speakers
of the Symposium on Decoherence Suppression in Quantum Systems held
at Oxford Kobe Institute, Kobe, Japan, from 7th to 11th September 2008.
Thesymposiumwasaimedtogatherresearchersworkingorhavinginterests
in the field of decoherence and its suppression in order to evoke further
developments in the field and to extend mutual collaborations.
The symposium was supported by “Open ResearchCenter” Projectfor
Private Universities: matching fund subsidy from MEXT (Ministry of Ed-
ucation, Culture, Sports, Science and Technology).
This volumeisorganizedsothatareadercanlearnmanyaspectsofde-
coherence and its suppression methods from fundamentals to recent topics
by following the lecture notes one by one. It is supposed to be useful for a
wide range of audience from a graduate student to a researcherwith inter-
est in this field, as the lectures note havebeen preparedin a self-contained
manner.
It is our hope that continuous and active researches in this field will
eventually resolve the long-standing problems of decoherence in order for
early realization of practical quantum computing.
WewouldliketothankMsZhangJiofWorldScientificforhereditorial
support.
Higashi-Osaka,September 2009
Mikio Nakahara
Robabeh Rahimi
Akira SaiToh
October19,2009 11:29 WSPC-ProceedingsTrimSize:9inx6in proceedings
vi
OUTLOOK OF THE SYMPOSIUM
Symposium on Decoherence Suppression
Title
in Quantum Systems
Place Oxford Kobe Institute, Kobe, Japan
Schedule 7-10 September 2008
Mikio Nakahara, Kinki University, Japan
Robabeh Rahimi, Kinki University, Japan
Committee
Yukihiro Ota, Kinki University, Japan
Akira SaiToh, Kinki University, Japan
Gen Kimura, National Institute of Advanced
Industrial Science and Technology, Japan
Frank Gaitan, Southern Illinois University, USA
Invited Speakers Yasushi Kondo, Kinki University, Japan
Yukihiro Ota, Kinki University, Japan
Akira SaiToh, Kinki University, Japan
Osama Moussa, Waterloo University, Canada
Contributed Speaker Masamitsu Bando, Osaka University, Japan
URL http://alice.math.kindai.ac.jp/˜symp08/
PROGRAM
7 (Sun) September 2008
10:45-12:15 Reception
12:15-13:00 Lunch
14:00-15:30 G. Kimura, Introduction to Decoherence: Overview I
15:30-16:00 Coffee Break
16:00-17:30 G. Kimura, Introduction to Decoherence: Overview II
18:00-19:00 Supper
20:00-21:30 G. Kimura, Introduction to Decoherence: Overview III
October19,2009 11:29 WSPC-ProceedingsTrimSize:9inx6in proceedings
vii
8 (Mon) September 2008
7:45-8:45 Breakfast
9:00-10:30 F. Gaitan, Quantum Error Correction and Fault-Tolerant
Quantum Computing I
10:30-10:45 Coffee Break
10:45-12:15 F. Gaitan, Quantum Error Correction and Fault-Tolerant
Quantum Computing II
12:15-13:00 Lunch
14:00-15:30 F. Gaitan, Quantum Error Correction and Fault-Tolerant
Quantum Computing III
15:30-16:00 Coffee Break
16:00-17:30 Y. Kondo, Engineered Noise: Application to Decoherence
Suppression Experiments
18:00-19:00 Supper
20:00-21:30 Y. Ota, Composite Pulses as Geometric Quantum Gates
9 (Tue) September 2008
7:45-8:45 Breakfast
9:30-10:30 O. Moussa, Noise Characterization and Quantum Error
Correction in Solid-state NMR I
10:30-10:45 Coffee Break
11:00-12:00 O. Moussa, Noise Characterization and Quantum Error
Correction in Solid-state NMR II
12:15-13:00 Lunch
14:00-15:30 F. Gaitan, Quantum Error Correction and Fault-Tolerant
Quantum Computing IV
15:30-16:00 Coffee Break
16:00-16:20 M.Bando,Holonomicquantumcomputinginadimermodel
18:00-19:00 Supper
20:00-21:30 Informal Discussions
October19,2009 11:29 WSPC-ProceedingsTrimSize:9inx6in proceedings
viii
10 (Wed) September 2008
7:45-8:45 Breakfast
9:00-10:30 A. SaiToh, Quantum Wipe Effect I
10:30-10:45 Coffee Break
10:45-12:15 A. SaiToh, Quantum Wipe Effect II
12:15-13:00 Lunch
14:00- Ending
October19,2009 11:29 WSPC-ProceedingsTrimSize:9inx6in proceedings
ix
LIST OF PARTICIPANTS
Daisuke Aratsu Osaka University, Japan
Chiara Bagnasco Universit`a di Roma, La Sapienza, Italy
Masamitsu Bando Osaka University, Japan
Vahideh Ebrahimi Bakhtavar Kinki University, Japan
Frank Gaitan Southern Illinois University, USA
Kenichi Kasamatsu Kinki University, Japan
Gen Kimura National Institute of Advanced Industrial
Science and Technology, Japan
Yasushi Kondo Kinki University, Japan
Osama Moussa University of Waterloo, Canada
Ayumi Muramatsu Kinki University, Japan
Mikio Nakahara Kinki University, Japan
Tetsuo Ohmi Kinki University, Japan
Yukihiro Ota Kinki University, Japan
Robabeh Rahimi Darabad Kinki University, Japan
Akira SaiToh Kinki University, Japan
Masahito Tada Kinki University, Japan
Masakazu Tanaka Waseda University, Japan
Hiroyuki Tomita Kinki University, Japan