1. Department of Physics
2. University of Michigan
3. Ann Arbor
4. USA
5. Department of Theoretical Physics
6. Faculty of Physics
7. Vilnius University
8. 10222 Vilnius
9. Lithuania
10. Department of Quantum Electronics
11. 10223 Vilnius
12. Division of Bioscience
13. Graduate School of Natural Science and Technology/Faculty of Science
14. Okayama University
15. Okayama 700-8530
16. Japan