(57) |
, the Green function at the C region, can be calculates as3
(58) | |||
(59) | |||
(60) | |||
(61) |
Note that is calculated for and .
define for the later convenience
(62) | |||
(63) |
In the equilibrium condition, 4
(64) | |||
(65) | |||
(66) |
(67) |
(68) | |||
(69) | |||
(70) |
How are and ?
They are defined in non-equilibrium region, C.
but near the region L or R, they approximately satisfy equilibrium condition.
(71) | |||
(72) |