QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: xhsh on May 10, 2009, 03:23

Title: Reflection coefficient
Post by: xhsh on May 10, 2009, 03:23

Hello, everybody,

This is not related to the usage of ATK and VNL. But I jut want to discuss with you about the problem of the calculation of reflection coefficient.

It is well known that transmission from left lead to right lead is calculated by T=Tr(Γ_L*G^R*Γ_R*G^A). And the reflection can be simply obtained by R=1-T.  However, I want to know, whether we can get it by R=Tr(Γ_L*G^R*Γ_L*G^A)?

I just want to understand something about the Landauer formula. Your answers are greatly appreciated.

Title: Re: Reflection coefficient
Post by: xhsh on May 12, 2009, 08:44

Nobody knows this or is just unwilling to answer it?

Title: Re: Reflection coefficient
Post by: nori on May 13, 2009, 10:07

I'm not sure but if the electrodes are homogeneous, Γ_L = Γ_R is approved.
It means that obviously reflection coefficient is NOT Tr(Γ_L*G^R*Γ_L*G^A).