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Non-adiabatic universal holonomic quantum gates

Utkan Güngördü, Yidun Wan, Mikio Nakahara

Published Jul 30, 2013• 0 citations
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Abstract

Utkan Gungordu, Yidun Wan, 3 and Mikio Nakahara 4 Research Center for Quantum Computing, Interdisciplinary Graduate School of Science and Engineering, Kinki University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan Department of Applied Physics, Graduate School of Engineering, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan Perimeter Institute for Theoretical Physics, 31 Caroline St N, Waterloo, ON N2L 2Y5, Canada Department of Physics, Kinki University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan

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Yuichiro Matsuzaki,1, ∗ Xiaobo Zhu,2 Kosuke Kakuyanagi,1 Hiraku Toida,1 Takaaki Shimooka,3 Norikazu Mizuochi,3 Kae Nemoto,4 Kouichi Semba,5 W. J. Munro,1 Hiroshi Yamaguchi,1 and Shiro Saito1 NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0198, Japan. Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China. Graduate School of Engineering Science, University of Osaka, 1-3 Machikane-yama, Toyonaka, Osaka 560-8531, Japan. National Institute of Informatics, 2-1-2 Hitotsubashi, Chiyoda-ku, Tokyo 101-8430, Japan. National Institute of Information and Communications Technology, 4-2-1, Nukuikitamachi, Koganei-city, Tokyo 184-8795 Japan
Spin Information Achieved by Energy Transfer Via Optical Near Fields Between Quantum Dots and Its Robustness A. Sato1, F. Minami1, H. Hori2 4, and K. Kobayashi3 4 ∗ 1Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro-ku, Tokyo 152-8551, Japan 2Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8551, Japan 3Department of Electrical and Electronics Engineering, University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan 4Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, 4-3-11 Takeda, Kofu, Yamanashi 400-8551, Japan
Yuki Kawaguchi Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan Masahito Ueda Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan Macroscopic Quantum Control Project, ERATO, JST, Bunkyo-ku, Tokyo 1138656, Japan The defining character of a topological object is that it can move and deform freely in space and time, yet retains its identity, characterized by a set of discrete numbers called topological charges. This ability to deform without changing its fundamental character lends a particular importance to the notion of topological excitations that is independent of specific material properties. Such topological excitations are spontaneously generated under classical and quantum phase transitions. This chapter is devoted to an overview of topological excitations with an emphasis on spinor Bose-Einstein condensates (BECs).