(135) | |||
(136) |
time independent (eigenvalue of the isolated L region)
Green functions become
(137) | |||
(138) | |||
(139) |
becomes
(140) | |||
(141) |
Here define
(142) | |||
(143) | |||
(144) | |||
(145) |
Use
,
(146) |
If region described by , is non-interacting,
then
is pure imaginary.
(147) |
Let's connect L-C-R.
Use equations,
(152) | |||
(153) | |||
(154) | |||
(155) | |||
(156) | |||
(157) | |||
(158) |
The prefactor in the definition of the current in the tight binding scheme (eq.(113)) is imaginary, but the evaluated current is real.