1. Center for Physical
Sciences
and Technology, Institute of Physics, Savanoriu
Avenue 231, LT-02300 Vilnius, Lithuania
2. Department of Theoretical Physics,
Faculty of Physics, Vilnius University,
Sauletekio Avenue 9, Building 3, LT-10222 Vilnius, Lithuania
3. Department of Physics and Astronomy,
Faculty of Sciences, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
4. Institut de Biologie et de Technologies
de Saclay, CEA, UMR 8221 CNRS, Université Paris Sud, CEA Saclay 91191 Gif sur Yvette, France