1. Institute of High Performance Computing, A*STAR, 1 Fusionopolis Way, Singapore 138632, Singapore
2. Department of Physics, National Changhua University of Education, Changhua 50007, Taiwan
3. Department of Mechanical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong 999077, Hong Kong
4. Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary
5. Department of Atomic Physics, Budapest University of Technology and Economics, Budafoki út 8, H-1111 Budapest, Hungary