Home Page of Koji Azuma

Imoto Laboratory, Division of Material Physics,
Department of Materials Engineering Science,
Graduate School of Engineering Science, Osaka University,
1-3 Machikaneyama, Toyonaka 560-8531, JAPAN

E-mail: azuma[put “@” here]qi.mp.es.osaka-u.ac.jp

Fellowship

Research Fellow of the Japan Society for the Promotion of Science (DC1),
2007/4/1-2010/3/31.

Research Interest

Quantum information theory:
• What can we do under the laws of nature?
• What is the role of quantum entanglement in information processing?
• What kind of information could exist in nature?

Realization of quantum information processing:

• How can we realize quantum computer and communication?
• What is the limit of realistic quantum computer and communication?

Papers

1. Koji Azuma, Hitoshi Takeda, Masato Koashi, and Nobuyuki Imoto,
   "Quantum repeaters and computation by a single module,"
   quant-ph/1003.0181.　
   
2. Koji Azuma, Naoya Sota, Masato Koashi, and Nobuyuki Imoto,
   "Tight bound on coherent-state-based entanglement generation over lossy channels,"
   Phys. Rev. A 81, 0223325 (2010),
   quant-ph/0908.2735.　
   
3. Koji Azuma, Naoya Sota, Ryo Namiki, Sahin Kaya Ozdemir, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto,
   "Optimal entanglement generation for efficient hybrid quantum repeaters,"
   Phys. Rev. A 80, 060303(R) (2009),
   quant-ph/0811.3100.　
   
4. Koji Azuma, Masato Koashi, and Nobuyuki Imoto,
   "Quantum catalysis of information,"
   quant-ph/0804.2426.　
5. Koji Azuma, Masato Koashi, Hosho Katsura and Nobuyuki Imoto,
   "Quantum cloning with nonlocal assistance: Complement of Jozsa's stronger no-cloning theorem,"
   quant-ph/0604009.　
   
6. Koji Azuma, Junichi Shimamura, Masato Koashi, and Nobuyuki Imoto,
   "Probabilistic cloning with supplementary information,"
   Phys. Rev. A 72, 032335 (2005),
   quant-ph/0505207.　
   
7. Kazuto Ohshima and Koji Azuma,
   "Proper magnetic fields for nonadiabatic geometric quantum gates in NMR,"
   Phys. Rev. A 68, 034304 (2003),
   quant-ph/0305109.　

International Conference/Workshop Presentations

1. Koji Azuma, Naoya Sota, Ryo Namiki, Sahin Kaya Ozdemir, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto,
   "Optimal entanglement generation in hybrid quantum repeaters,"
   Conference on Quantum Information & Quantum Control III (Poster),
   Fields Institude (Canada),
   2009/8/25.
2. Koji Azuma, Masato Koashi, and Nobuyuki Imoto,
   "Accessing genuinely quantum information without causing disturbance,"
   QIP 2009 (Poster),
   Santa Fe Convention Center (USA),
   2009/1/14.
3. Koji Azuma, Masato Koashi, and Nobuyuki Imoto,
   "Quantum catalysis of information,"
   International Symposium on Physics of Quantum Technology (Poster),
   Nara Prefectural New Public Hall (Japan),
   2008/11/27.
4. Koji Azuma,
   "Quantum catalysis of information and its implications,"
   GSIS workshop on quantum information theory (Invited),
   Tohoku University (Japan),
   2008/11/7.
5. Koji Azuma, Masato Koashi, and Nobuyuki Imoto,
   "Quantum catalysis of information,"
   QCMC 2008 (Poster),
   University of Calgary (Canada),
   2008/8/20.
6. Koji Azuma, Masato Koashi, and Nobuyuki Imoto,
   "Quantum catalysis of information,"
   APS march meeting (Oral),
   Morial Convention Center (USA),
   2008/3/11.
7. Koji Azuma, Masato Koashi, Hosho Katsura and Nobuyuki Imoto,
   "Quantum cloning with nonlocal assistance: Complement of Jozsa's stronger no-cloning theorem,"
   Handai Nano Symposium (Poster),
   Osaka University (Japan),
   2007/9/27.
8. Koji Azuma, Masato Koashi, Hosho Katsura and Nobuyuki Imoto,
   "Quantum cloning with nonlocal assistance: Complement of Jozsa's stronger no-cloning theorem,"
   AQIS 2007 (Oral),
   Shiran Kaikan, Kyoto University (Japan),
   2007/9/4.
9. Koji Azuma, Masato Koashi, and Nobuyuki Imoto,
   "What kind of assistance enables quantum cloning?,"
   APS march meeting (Oral),
   Colorad Convention Center (USA),
   2007/3/8.
10. Koji Azuma, Junichi Shimamura, Masato Koashi, and Nobuyuki Imoto,
    "Probabilistic cloning with supplementary information,"
    COE-Kakenhi workshop on quantum information theory and Quantum statistical inference (Oral),
    The University of Tokyo (Japan),
    2005/11/18.
11. Koji Azuma, Junichi Shimamura, Masato Koashi, and Nobuyuki Imoto,
    "Probabilistic cloning with supplementary information,"
    EQIS 2005 (Poster),
    The National Museum of Emerging Science and Innovation (Japan),
    2005/8/29
12. Koji Azuma, Junichi Shimamura, Masato Koashi, and Nobuyuki Imoto,
    "Probabilistic cloning with supplementary information,"
    IQEC and CLEO-PR2005 (Poster),
    The Nippon Toshi Center Hotel (Japan),
    2005/7/15.

Prizes

1. Tanaka prize (a prize for an excellent master thesis),
   2007/3/22.

Academic Societies

1. Phys. Soc. Japan, Student member.

Link

1. Imoto Laboratory.　
2. Nagaosa Laboratory.