Institution: | a CEA, Institut de Biologie et Technologie de Saclay, et CNRS, 91191 Gif-sur-Yvette cedex, France b Institute of Physics, Savanoriu 231, LT-02300 Vilnius, Lithuania c Department of Theoretical Physics, Vilnius University, Sauletekio 9, LT-10222 Vilnius, Lithuania |