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CHEN, Kai
Title Professor
Telephone 0086-551-3607951
E-mail kaichen@ustc.edu.cn
Homepage http://staff.ustc.edu.cn/~kaichen/
Education
  • Ph.D. in Theoretical Physics, 1997-2001
    Thesis Advisor: Prof. Bo-yu Hou
    Institute of Modern Physics, Northwest University
    (Xi’an, P.R. China)


    B.A. in Physics, 1993-1997
    Department of Physics, Northwest University
    (Xi’an, P.R. China)

Experience
  • May 2008-Present: Professor,
    Recipients of the "Hundred Talents Program" of Chinese Acadmy of Sciences
    University of Science and Technology of China
    (Hefei and Shanghai, China)


    May 2006-April 2008: Postdoctoral fellow and Marie-Curie research fellow
    Mentor: Prof. Jian-Wei Pan
    Institute of Physics, University of Heidelberg
    (Heidelberg, Germany)


    Sept. 2004-April 2006: Alexander von Humboldt research fellow
    Mentor: Prof. Sergio Albeverio
    Institute of Applied Mathematics, University of Bonn
    (Bonn, Germany)


    Sep. 2003-Aug. 2004: Postdoctoral fellow
    Mentor: Prof. Hoi-Kwong Lo
    Center for Quantum Information and Quantum Control
    Department of Physics, University of Toronto
    (Toronto, Canada)


    July 2001-June 2003: Postdoctoral fellow
    Mentors: Prof. Ling-An Wu and Prof. Guo-Zhen Yang
    Laboratory of Optics Physics, Institute of Physics, Chinese Academy of Sciences
    (Beijing, P.R. China)

Research Interest
  • Our group's research focuses on in-depth study and exploration of multi-photon manipulation and application in optical quantum information processing, quantum information theory, as well as quantum entanglement properties and their applications. In terms of quantum communication technology, the emphasis is on how to achieve for longer distance communication, higher communication speed, better stability and reliability in real-life situation, and with guarantee of communication security. We are dedicated to the research of new communication schemes and related key technologies under the goal of pushing forward the practical and network-based development of quantum communication. In the course of theoretical aspects, we are also undertaking research on the separability problem of quantum states, the construction of new Bell inequality, the non-locality test of quantum mechanics, the classic and quantum many-body problem, and low-dimensional condensed matter physics.


    Recent research also covers mechanism of financial and stock market by employing principles and methods from quantum physics. Particularly we are focusing on quantitative trading strategy and model for gaining alpha earnings in real market, which would motivate a more active investment environment and decrease capital risk. At the mean time, we expect that the research would boost steady economic running through dynamical optimizing of capital allocation for our country.

Publications
  • 1.    Metropolitan all-pass and inter-city quantum communication network
    Optics Express, 18 (2010) 27217-27225,
    Teng-Yun Chen, Jian Wang, Hao Liang, Wei-Yue Liu, Yang Liu, Xiao Jiang, Yuan Wang, Xu Wan, Wen-Qi Cai, Lei Ju, Luo-Kan Chen, Liu-Jun Wang, Yuan Gao, Kai Chen, Cheng-Zhi Peng, Zeng-Bing Chen, and Jian-Wei Pan


    2.    Verifying Genuine High-Order Entanglement,
    Phys. Rev. Lett., 105 (2010) 210504,
    Che-Ming Li, Kai Chen, Andreas Reingruber, Yueh-Nan Chen, and Jian-Wei Pan


    3.    Experimental Demonstration of a Heralded Entanglement Source
    Nature Photonics, 4 (2010) 549-552,
    Claudia Wagenknecht, Che-Ming Li, Andreas Reingruber, Xiao-Hui Bao, Alexander Goebel, Yu-Ao Chen, Qiang Zhang, Kai Chen, and Jian-Wei Pan


    4.   Experimental Free-Space Quantum Teleportation
    Nature Photonics, 4 (2010) 376-381,
    Xian-Min Jin, Ji-Gang Ren, Bin Yang, Zhen-Huan Yi, Fei Zhou, Xiao-Fan Xu, Shao-Kai Wang, Dong Yang, Yuan-Feng Hu, Shuo Jiang, Tao Yang, Hao Yin, Kai Chen, Cheng-Zhi Peng and Jian-Wei Pan


    5.   Decoy-state quantum key distribution with polarized photons over 200 km
    Optics Express, 18 (2010) 8587-8594,
    Yang Liu, Teng-Yun Chen, Jian Wang, Wen-Qi Cai, Xu Wan, Luo-Kan Chen, Jin-Hong Wang, Shu-Bin Liu, Hao Liang, Lin Yang, Cheng-Zhi Peng, Kai Chen, Zeng-Bing Chen, and Jian-Wei Pan


    6.   Experimental determination of entanglement for arbitrary pure states,
    Phys. Rev. A, 80 (2009) 032320
    Shao-Ming Fei, Ming-Jing Zhao, Kai Chen, and Zhi-Xi Wang


    7.   Long-distance quantum teleportation assisted with free-space entanglement distribution,
    Chinese Physics B, 18 (2009) 3605-3610,
    Ren Ji-Gang, Yang Bin, Yi Zhen-Huan, Zhou Fei, Chen Kai, Peng Cheng-Zhi, and Pan Jian-Wei


    8.   Field test of a practical secure communication network with decoy-state quantum cryptography,
    Optics Express, 17 (2009) 6540-6549,
    Teng-Yun Chen, Hao Liang, Yang Liu, Wen-Qi Cai, Lei Ju, Wei-Yue Liu, Jian Wang, Hao Yin, Kai Chen, Zeng-Bing Chen, Cheng-Zhi Peng, and Jian-Wei Pan


    9.   Multistage Entanglement Swapping
    Phys. Rev. Lett., 101 (2008) 080403,
    Alexander Goebel, Claudia Wagenknecht, Qiang Zhang, Yu-Ao Chen, Kai Chen Jörg Schmiedmayer, and Jian-Wei Pan


    10. Entanglement of formation and concurrence for mixed states
    Front. Comput. Sci. China, 2 (2008) 114–128,
    Xiuhong Gao, Albeverio Sergio, Kai Chen, Shaoming Fei, Xianqing Li-Jost


    11. Experimental Realization of One-Way Quantum Computing with Two-Photon Four-Qubit Cluster States,
    Phys. Rev. Lett., 99 (2007) 120503,
    Kai Chen, Che-Ming Li, Qiang Zhang, Yu-Ao Chen, Alexander Goebel, Shuai Chen, Alois Mair and Jian-Wei Pan


    12. Multi-partite quantum cryptographic protocols with noisy GHZ states,
    Quantum Information & Computation, 99 (2007) 689-715,
    Kai Chen and Hoi-Kwong Lo


    13. Two-Setting Bell Inequalities for Many Qubits,
    Phys. Rev. A, 74 (2006) 050101(R),
    Kai Chen, Sergio Albeverio, and Shao-Ming Fei


    14. Decoy state quantum key distribution with two-way classical post-processing,
    Phys. Rev. A, 74 (2006) 032330,
    Xiongfeng Ma, Chi-Hang Fred Fung, Frédéric Dupuis, Kai Chen, Kiyoshi Tamaki, Hoi-Kwong Lo


    15. Concurrence-based entanglement measure for Werner States,
    Reports on Mathematical Physics, 58 (2006) 325-334,
    Kai Chen, Sergio Albeverio, and Shao-Ming Fei


    16. Entanglement of Formation of Bipartite Quantum States,
    Phys. Rev. Lett., 95 (2005) 210501,
    Kai Chen, Sergio Albeverio, and Shao-Ming Fei


    17. Concurrence of Arbitrary Dimensional Bipartite Quantum States,
    Phys. Rev. Lett., 95 (2005) 040504,
    Kai Chen, Sergio Albeverio, and Shao-Ming Fei


    18. Decoy State Quantum Key Distribution,
    Phys. Rev. Lett., 94 (2005) 230504,
     Hoi-Kwong Lo, Xiongfeng Ma and Kai Chen


    19. Conference Key Agreement and Quantum Sharing of Classical Secrets with Noisy GHZ states,
    Proceedings of the 2005 IEEE International Symposium on Information Theory, Adelaide, Australia, (2005) 1607-1611,
    Kai Chen and Hoi-Kwong Lo


    20. Test for entanglement using physically observable witness operators and positive maps,
    Phys. Rev. A, 69 (2004) 022312,
    Kai Chen, Ling-An Wu


    21. The generalized reduction criterion for separability of quantum states,
    Phys. Rev. A, 68 (2003) 062313,
    Sergio Albeverio, Kai Chen and Shao-Ming Fei


    22. Is “superluminal” light propagation possible in dispersive medium?
    Chin. Phys. Lett., 21 (2004) 770-773,
    Kai Chen, Ling-An Wu and Yanhua Shih


    23. The generalized partial transposition criterion for separability of multipartite quantum states,
    Phys. Lett. A, 306 (2002) 14-20,
    Kai Chen and Ling-An Wu


    24. A matrix realignment method for recognizing entanglement,
    Quantum Information & Computation3  (2003) 193-202,
    Kai Chen and Ling-An Wu


    25. The Dn Ruijsenaars-Schneider model,
    J. Phys. A: Math. Gen., 34, No.37 (2001) 7579-7589,  
    Kai Chen and Bo-yu Hou


    26. The Lax pair for elliptic Cn- and BCn-type RS models and their spectral curves,
    J.  Math. Phys., 42 (2001) 4894-4914, 
    Kai Chen, Bo-yu Hou and Wen-Li Yang


    27. The Lax pair for C2-type Ruijsenaars-Schneider model,
    Chin. Phys., 10 (2001) 550-554,
    Kai Chen, Bo-yu Hou and Wen-Li Yang


    28. Lax pair and involutive Hamiltonian for Cn and BCn Ruijsenaars-Schneider models,
    in “Integrable Quantum Field Theories and ApplicationsEds. by Changrim Ahn, Chaiho Rim, Ryu Sasaki (World Scientific, Singapore, 2001) pp35-54.
    Kai Chen, Bo-yu Hou and Wen-Li Yang


    29. Integrability of the Cn and BCn Ruijsenaars-Schneider models,
    J. Math. Phys., 41, (2000) 8132-8147, 
    Kai Chen, Bo-yu Hou and Wen-Li Yang


    30. Elliptic Ruijsenaars-Schneider and Calogero-Moser models represented by Sklyanin algebra and sln Gaudin algebra,
    Prog. Theor. Phys. Suppl., 135 (1999) 149-165,
    Kai Chen, Heng Fan, Bo-yu Hou, Kang-Jie Shi, Wen-Li Yang and Rui-Hong Yue


    31. Nondynamical r-matrix structure of the sl2 trigonometric Ruijsenaars-Schneider model,
    Chin. Phys. Lett., 16 (1999) 1-3,
    Kai Chen, Bo-yu Hou, Wen-Li Yang and Yi Zhen


    32. 三角Calogero-Moser模型的非动力学r矩阵
    高能物理与核物理Vol. 23, No. 9 (1999) 854-858,
    甄翼侯伯宇杨文力陈凯

Teaching
  • CLASS: PH35202-2011 Fall
    "Physics of Quantum Information"


    HOURS: Monday 9:45 am to 11:20 am, Wednesday 9:45 am to 11:20 am
    CLASSROOM: 1104, USTC
    http://staff.ustc.edu.cn/~kaichen/