Rev. B 79, 195315 (2009).; P. My¨ oh¨ anen, A. Stan, G. Stefanucci and R. van Leeuwen, Phys. Rev. B 80, 115107 (2009).; A. R. Hern´ andez, F. A. Pinheiro, C. H. Lewenkopf, and E.R. Mucciolo, Phys. Rev. B 80, 115311 (2009). 

37 T. L. Schmidt, P. Werner, L. M¨ uhlbacher, and A. Komnik, Phys. Rev. B 78, 235110 (2008).; J. Maciejko, J. Wang, and H. Guo, Phys. Rev. B 74, 085324 (2006). 

38 P. Nordlander, M. Pustilnik, Y. Meir, N. S. Wingreen, and D. C. Langreth, Phys. Rev. Lett. 83, 808 (1999). M. Plihal, D. C. Langreth, and P. Nordlander, Phys. Rev. B 71, 165321 (2005). 

39 A. Goker, B. A. Friedman, and P. Nordlander, J. Phys.: Condens. Matter 19, 376206 (2007). A. Komnik, arXiv:0903.3344v1(unpublished). 

40 R.-P. Riwar and T. L. Schmidt, Phys. Rev. B 80, 125109 (2009), and refernces therein. 

41 H. H¨ ubener and T. Brandes, Phys. Rev. B 80, 155437 (2009).; S. Ramakrishnan, Y. Gulak and H. Benaroya, Phys. Rev. B 78, 174304 (2008).; G. Kiesslich, E. Sch¨ oll, T. Brandes, F. Hohls, and R. J. Haug, Phys. Rev. Lett. 99, 206602 (2007).; H. H¨ ubener and T. Brandes, Phys. Rev. Lett. 99, 247206 (2007). 

42 Michael Galperin, Abraham Nitzan, and Mark A. Ratner, Phys. Rev. B 74, 075326 (2006).; V. Nam Do, P. Dollfus, and V. Lien Nguyen, Appl. Phys. Lett. 91, 022104 (2007). 

43 Michael Galperin, Abraham Nitzan, and Mark A. Ratner, Phys. Rev. B 73, 045314 (2006).; Nano Lett. 4, 1605 (2004). 

44 I. S. Gradshteyn and I. M. Ryzhik, Tables of Integrals, Series and Products Academic, New York, (1980), P. 837. 

45 I. S. Gradshteyn and I. M. Ryzhik, Tables of Integrals, Series and Products Academic, New York, (1980), P. 311. 

46 T. Brandes and N. Lambert, Phys. Rev. B 67, 125323 (2003),; D. A. Rodrigues, J. Imbers, and A. D. Armour, Phys. Rev. Lett. 98, 067204 (2007). 

47 F. Pistolesi, and S. Labarthe, Phys. Rev. B 76, 165317 (2007). 

