Gai, Yanqin
Jiang, Jiaping
Wu, Yuxi
Tang, Gang
Funding for this research was provided by:
the Fundamental Research Funds for the Central Universities (2010LKWL03)
the Special Fund for Theoretical Physics (11047130)
the National Natural Science Foundation of China (11104345)
the Key Project of Chinese National Programs for Fundamental Research and Development(973 program) (2011CB302003)