[1] Yerevan Phys Inst, Yerevan 375036, Armenia
[2] Acad Sinica, Inst Phys, Taipei 11529, Taiwan
[3] Yerevan State Univ, Int Ctr Adv Study, Yerevan 375025, Armenia
[4] Natl Taiwan Univ, Div Phys, Natl Ctr Theoret Sci Taipei, Taipei 10617, Taiwan
[5] Chung Yuan Christian Univ, Ctr Nonlinear & Complex Syst, Chungli 320, Taiwan
[6] Chung Yuan Christian Univ, Dept Phys, Chungli 320, Taiwan