[1] H\"{anggi P and Ingold G-L 2006 Acta. Phys. Pol. B
37 1537

[2] Caldeira A O and Leggett A J 1983 Physica A
121 587

[3] Caldeira A O and Leggett A J 1983 Ann. Phys.
149 374

[4] Leggett A J 1984 Phys. Rev. B 30 1208

[5] Ford G W, Lewis J T and O'Connell R F 1985 Phys.
Rev. Lett. 55 2273

[6] Hakim V and Ambegaokar V 1985 Phys. Rev. A
32 423

[7] Ullersma P 1966 Physica (Utrecht) 32 27

[8] Haake F and Reibold R 1985 Phys. Rev. A 32
2462

[9] Bao J D and Zhuo Y Z 2003 Phys. Rev. Lett. 91
91 138104

[10] Bao J D, Song Y L, Q Ji, and Zhuo Y Z 2005 Phys.
Rev. E 72 011113

[11] Bao J D and Zhuo Y Z 2005 Phys. Rev. E 71
010102(R)

[12] Bao J D and Boilley D 2002 Nucl. Phys. A 707
707 47

[13] Leggett A J 1981 Phys. Rev. Lett. 46 211

[14] Weiss U 1999 Quantum Dissipative Systems 2nd edn
(Singapore: World Scientific)

[15] Pottier N 2003 Physica A 317 371

[16] Ford G W, Lewis J T and O'Connell R F 1988 Phys.
Rev. A 37 4419

[17] Li X L, Ford G W and O'Connell R F 1990 Phys. Rev.
A 41 5287

[18] Li X L, Ford G W and O'Connell R F 1990 Phys. Rev.
A 42 4519

[19] Grabert H, Schramm P and Ingold G -L 1987 Phys. Rev.
Lett. 58 1285

[20] Ford G W and O'Connell R F 2005 Physica E 29
29 82

[21] Ao P and Thouless D J 1994 Phys. Rev. Lett.
72 132

[22] Ao P 1997 Physica Scripta T69 7