Masanao Ozawa

Last updated: Mar 31, 2014 at 15:00
 
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Name
Masanao Ozawa
Affiliation
Nagoya University
Section
Graduate School of Information Science
Job title
Professor
Degree
Dr Sci
Other affiliation
National Institute of Informatics

Academic & Professional Experience

 
Apr 2009
 - 
Mar 2010
Visiting Professor, Tohoku University
 
Oct 2008
 - 
Today
Visiting Professor, National Institute of Informatics
 
Apr 2008
 - 
Today
Professor, Graduate School of Information Science, Nagoya University
 
Oct 2001
 - 
Mar 2008
Professor, Graduate School of Information Science, Tohoku University
 
May 2001
 - 
Sep 2001
Visiting Professor, Department of Electrical and Computer Science, Northwestern University
 
Jul 1995
 - 
Sep 2001
Professor, School of Informatics and Science, Graduate School of Human Informatics, Nagoya University
 
Sep 1989
 - 
Mar 1990
Visiting Scholar, Lyman Laboratory of Physics, Harvard University
 
Oct 1988
 - 
Aug 1989
Visiting Associate Professor, Department of Electrical Engineering and Computer Science, Northwestern University
 
Jun 1986
 - 
Jun 1995
Associate Professor, Department of Mathematics, College of General Education, School of Informatics and Science, Nagoya University
 
Mar 1985
 - 
Jun 1986
Lecturer, Department of Mathematics, College of General Education, Nagoya University
 
Apr 1979
 - 
Feb 1985
Assistant Professor, Department of Information Science, Faculty of Science, Tokyo Institute of Technology
 

Awards & Honors

 
Jul 2010
8th International Quantum Communication Award
 
Mathematical theory of quantum measurement and quantum computing
Apr 2010
Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology
 
Pioneering study of quantum measurement theory
Sep 2008
MSJ Autumn Prize
 
Mathematical Foundations of Quantum Information
Feb 1980
Tejima Memorial Research Prize
 
Optimal measurements for general quantum systems

Published Papers

 
Francesco Buscemi, Michael J. W. Hall, Masanao Ozawa, and Mark M. Wilde
Physical Review Letters   112(5) 050401/1-050401/5   Feb 2014   [Refereed]
Masanao Ozawa
Sugaku Expositions      Jan 2014
Fumihiro Kaneda, So-Young Baek, Masanao Ozawa, and Keiichi Edamatsu
Physical Review Letters   112(2) 020402/1-020402/5   Jan 2014   [Refereed]
We experimentally test the error-disturbance uncertainty relation (EDR) in generalized, strength-variable
measurement of a single photon polarization qubit, making use of weak measurement that keeps the initial
signal state practically unchanged.W...
Georg Sulyok, Stephan Sponar, Jacqueline Erhart, Gerald Badurek, Masanao Ozawa, and Yuji Hasegawa
Physical Review A   88(2) 022110/1-022110/15   Aug 2013   [Refereed]
So-Young Baek, Fumihiro Kaneda, Masanao Ozawa & Keiichi Edamatsu
Scientific Reports   3 2221   Jul 2013   [Refereed]
J. Erhart, S. Sponar, G. Sulyok, G. Badurek, M. Ozawa, and Y. Hasegawa
Nature Physics   8(3) 185-189   Mar 2012   [Refereed]
Masanao Ozawa, Yuichiro Kitajima
Foundations of Physics   42(4) 475-487   Feb 2012   [Refereed]
M. Ozawa
AIP Conference Proceedings   1363 53-62   Oct 2011   [Refereed][Invited]
M. Ozawa
Foundations of Physics   41(3) 592-607   Mar 2011   [Refereed][Invited]
T. Karasawa, J. Gea-Banacloche, and M. Ozawa
Journal of Physics A: Mathematical and Theoretical   42 225303--16   May 2009   [Refereed]
A Protocol of Quantum Authentication with Secure Quantum Passwords
M. Hotta and M. Ozawa
AIP Conference Proceedings   1110 388-391   Apr 2009   [Refereed]
Theoretical constraints on implementations of arbitrary single-qubit gates under conservation laws
T. Karasawa, M. Ozawa, and K. Nemoto
AIP Conference Proceedings   1110 411-414   Apr 2009   [Refereed]
H. Nishimura and M. Ozawa
Quantum Information Processing   8(1) 13-24   Feb 2009   [Refereed]
G. Kimura, B. K. Meister, and M. Ozawa
Physical Review A   78 032106 (1-7)   Sep 2008   [Refereed]
The Wigner-Araki-Yanase (WAY) theorem shows that additive conservation laws limit the accuracy of measurements. Recently, various quantitative expressions have been found for quantum limits on measurements induced by additive conservation laws, an...
Quantum precision limits for any implementation of single qubit gates under conservation laws
T. Karasawa, M. Ozawa, J. Gea-Banacloche, and K. Nemoto
International Journal of Quantum Information   6 701-706   Jul 2008   [Refereed]
Low-noise channel estimation
M. Hotta, T. Karasawa, K. Matsumoto, and M. Ozawa
Proc. 8th Int. Conf. on Quantum Communication, Measurement and Computing (NICT Press, Tokyo)   319-322   Jul 2007   [Refereed]
Simultaneous measurability of non-commuting observables and the universal uncertainty principle
M. Ozawa
Proc. 8th Int. Conf. on Quantum Communication, Measurement and Computing (NICT Press, Tokyo)   363-368   Jul 2007   [Refereed][Invited]
M. Ozawa
The Journal of Symbolic Logic   72(2) 625-648   Jun 2007   [Refereed]
G. Kimura, H. Tanaka, and M. Ozawa
Zeitschrift feur Naturforschung   62a 152-156   Apr 2007   [Refereed]
Conventional solutions to the (Mean) King's problem without using entanglement have been investigated by Aravind [P. K. Aravind, ``Best conventional solutions to the King's problem'', Z. Naturforsch. 58a, 682 (2003)]. We report that the upper boun...
Conservation-law-induced quantum limits for physical realizations of the quantum NOT gate
Tokishiro Karasawa and Masanao Ozawa
Physical Review A   75(3) 032324/1-032324/16   Mar 2007   [Refereed]

Misc

 
小澤正直
数理科学   50(9) 23-29   Sep 2012
金田文寛, BAEK So‐Young, 枝松圭一, 小澤正直
日本物理学会講演概要集   67(2) 140   Aug 2012
小澤正直
科学   82(7) 0778-0787   Jul 2012
小澤正直
数理科学   50(4) 26-27   Apr 2012
BAEK So‐Young, 金田文寛, 枝松圭一, 小澤正直
日本物理学会講演概要集   67(1) 232   Mar 2012
小澤正直
素粒子論研究   119(4A) D210-D228   Feb 2012
小澤正直
物性研究   97(5) 1031-1057   Feb 2012
Karasawa Tokishiro, Ozawa Masanao, Nemoto Kae
Meeting abstracts of the Physical Society of Japan   65(1) 209   Mar 2010
Masanao Ozawa
   Aug 2009
Orthomodular logic represented by a complete orthomodular lattice has been studied as a pertinent generalization of the two-valued logic, Boolean-valued logic, and quantum logic. In this paper, we introduce orthomodular logic valued models for ...
64(5) 349-353   May 2009
Ozawa Masanao
Butsuri   64(5) 349-353   May 2009   [Refereed][Invited]
In his paper entitled "Studies on the Foundation of Quantum Mechanics. I" (1937), Kodi Husimi discovered the orthomodular law, a universally valid fundamental law of quantum logic. In the 1960's this replaced the modular law that von Neumann had p...
Ozawa Masanao
Meeting abstracts of the Physical Society of Japan   64(1) 307   Mar 2009   [Invited]
Masahiro Hotta, Masanao Ozawa
   Jun 2008
We propose a quantum authentication protocol that is robust against the theft of secret keys. In the protocol, disposable quantum passwords prevent impersonation attacks with stolen secret keys. The protocol also prevents the leakage of secret ...
Karasawa Tokishiro, Ozawa Masanao, Nemoto Kae
Meeting abstracts of the Physical Society of Japan   63(1)    Feb 2008
Kimura G., Meister B.K., Ozawa M.
Meeting abstracts of the Physical Society of Japan   63(1)    Feb 2008
OZAWA Masanao
J. Japan Ass. Phil. Sci.   32(1) 9-17   Oct 2004   [Refereed][Invited]
Ozawa Masanao
Butsuri   59(3) 157-165   Mar 2004   [Refereed][Invited]
Classical mechanics leads to the deterministic view on the world, according to which the complete knowledge on the past state derives the complete knowledge on future values of physical quantities, whereas quantum mechanics shows that it is imposs...
Ozawa Masanao
Meeting abstracts of the Physical Society of Japan   58(1)    Mar 2003
Ozawa Masanao
Meeting abstracts of the Physical Society of Japan   56(1)    Mar 2001

Conference Activities & Talks

 
Keiichi Edamatsu and Masanao Ozawa
Press Conference   18 Dec 2013   Tohoku University, Nagoya University
A research team led by Professor Keiichi Edamatsu, Research Institute of Electrical Communication at Tohoku University and Professor Masanao Ozawa, Graduate School of Information Science at Nagoya University has experimentally verified a violation...
Masanao Ozawa
Colloquium, Centre for Quantum Technologies, National University of Singapore   28 Nov 2013   
Masanao Ozawa
Emergent Quantum Mechanics (EmQM13), 2nd International Symposium about Quantum Mechanics based on a Deeper Level Theory,   6 Oct 2013   
Masanao Ozawa
2nd International Symposium about Quantum Mechanics based on a Deeper Level Theory, Opening Event: The Future of Quantum   3 Oct 2013   
Masanao Ozawa
The 13th International Conference on Squeezed States and Uncertainty Relations (ICSSUR 2013) (Nuremberg, Germany, June 24-28, 2013)   24 Jun 2013   
Masanao Ozawa
A Marcus Wallenberg Symposium "Quantum Theory: Advances and Problems" (QTAP) (Vaxjo, Sweden, June 10-13, 2013)   12 Jun 2013   
Masanao Ozawa
The Fourth Nagoya Winter Workshop on Quantum Information, Measurement, and Quantum Foundations (NWW 2013) (Nagoya, Japan, February 18-22, 2013)   21 Feb 2013   
Masanao Ozawa
International Symposium "Nanoscience and Quantum Physics" (nanoPHYS’12) (International House of Japan, Tokyo, December 17-19, 2012)   17 Dec 2012   
Measurement-Disturbance Uncertainty Relations in Generalized Photon Polarization Measurements [Invited]
K. Edamatsu (invited speaker), S.-Y. Baek, F. Kaneda, and M. Ozawa
6th Asia-Pacific Conference and Workshop on Quantum Information Science (Putrajaya, Malaysia, December 3-7, 2012)   4 Dec 2012   
Error-disturbance uncertainty relation studied in successive spin-measurements
Jacqueline Erhart, Stephan Sponar, Georg Sulyok, Gerald Badurek, Masanao Ozawa and Yuji Hasegawa (presenter)
11th International Conference on Quantum Communication, Measurement and Computing (QCMC 2012) (Vienna, Austria, 30 July - 3 August, 2012)   3 Aug 2012   
Experimental test of measurement-disturbance relations in generalized photon-polarization measurements
So-Young Baek (presenter), Fumihiro Kaneda, Masanao Ozawa, and Keiichi Edamatsu
11th International Conference on Quantum Communication, Measurement and Computing (QCMC 2012) (Vienna, Austria, 30 July - 3 August, 2012)   2 Aug 2012   
Heisenberg Uncertainty Principle [Invited]
Masanao Ozawa
The 26th Quantum Information Technology Symposium (QIT26) (Fukui)   22 May 2012   
Weak values, measurement error, and the uncertainty principle [Invited]
Masanao Ozawa
Mini-Workshop on Development of Weak Measurement and Weak Value (Tokyo)   8 May 2012   
An introduction to qubit measurements [Invited]
Masanao Ozawa
NII Lecture (Tokyo, 2012.3.15)   Mar 2012   
Uncertainty principle for qubit measurements [Invited]
Masanao Ozawa
Special Qulink Seminar (Tokyo, 2012.3.15)   Mar 2012   
Violations of the Heisenberg uncertainty principle [Invited]
Masanao Ozawa
The Third Nagoya Winter Workshop on Quantum Information, Measurement, and Foundations, Nagoya University, Japan, 16 (14-18) February 2012   Feb 2012   
Quantum Correlation, Measurement and Contextuality
Masanao Ozawa
QUIT Seminar, University of Pavia Pavia, Italy, 4 July 2011.   Jul 2011   
Complementarity and which-way measurement
Masanao Ozawa
SEMINAR FÜR NEUTRONEN-, FESTKÖRPER- UND QUANTENPHYSIK, Vienna Univsersity of Technology, Vienna, 10 June 2011.   Jun 2011   
Foundations of Quantum Measurement Theory [Invited]
Masanao Ozawa
Operational Quantum Physics Seminar, University of Turku, Turku, Finland, 20 June 2011.   Jun 2011   
Quantum Correlation, Measurement and Contextuality [Invited]
Masanao Ozawa
Clarendon Laboratory Seminar, Oxford University, Oxford, UK, 23 June 2011.   Jun 2011   

Research Grants & Projects

 
Reality and Measurement in Algebraic Quantum Theory
The John Templeton Foundations: Core Funding Area, Science and the Big Questions, Mathematical and Physical Sciences
Project Year: Oct 2012 - Jun 2015    Investigator(s): Masanao Ozawa
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 2005 - 2008    Investigator(s): Ozawa MASANAO
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 2002 - 2004    Investigator(s): Masanao OZAWA
1.Heisenberg's uncertainty principle, which gives the trade-off between measurement noise and disturbance, has been reconsidered. Its limitation of the validity has been clarified and the universally valid generalization (universal uncertainty pri...
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 1999 - 2001    Investigator(s): Masanao OZAWA
The following results have been obtained on mathematical foundations on quantum Turing machine and quantumcircuits: (1) Local transition functions of quantum Turing machines (QTM) are generally characterized including multitape cases. (2) The noti...
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 1996 - 1998    Investigator(s): Masanao OZAWA
This is an interdisciplinary research including foundations of mathematics, applied analysis, mathematical physics, and quantum mechanics. The representation theory of hyperfinite Heisenberg groups was instituted by Ojima and Ozawa in 1992 in orde...