[1]Kastner M A 1992 Rev. Mod. Phys. 64 849

[2] Ashoori R C 1996 Nature 379 413

[3]Gammon D 2000 Nature 405 899

[4] Korotkov A N and Paalan M A 1999 Appl. Phys.
Lett. 74 4052

[5] Furusaki A, Takayanagi H and Tsukada M T 1992
Phys. Rev. B 45 10563

[6] Aly Arafa H, Phillips Adel H and Kamel R 1999
Egypt. J. Phys. 30 32

[7] Beenakker C W J 1997 Rev. Mod. Phys. 69 731

[8] Aleiner L and Glazman L I 1998 Phys. Rev. B 57 9608

[9] Phillips A H et al 2007 J. of Comp. and Theor.
Nanoscience 4 174

[10] Grifoni M and Hanggi P 1998 Phys. Rep. 304 232

[11] Aguado R and Kouwenhoven L P 2000 Phys. Rev.
Lett. 84 1986

[12] Knobel R, Yung C S and Cleland A N 2002 Appl.
Phys. Lett. 81 532

[13] Zorin A B et al 2000 J. Appl. Phys. 88 2665

[14] Desling P 2001 Phys. Rev. Lett. 86 3376

[15] Cunninghem J et al 2000 Phys. Rev. B 62 1564

[16] Zudov M A 2004 Phys. Rev. B 69 041304(R)

[17] Atallah A S et al 2006 Nano Lett. 1 259

[18] Kovalev A E et al 2004 Solid State Commun.
130 379