# Questions tagged [quantum-transport]

Quantum transport is the study of transport phenomena (the exchange of mass, energy, charge, or momentum in systems out of equilibrium) governed by quantum mechanics. In particular, this includes electron transport (electrical current flow) in micro- and nano-scale systems.

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### Is it possible to say that entropy would affect the charge transportation?

I noticed there are a few papers from Dr. Karuppuchamy Navamani, for example: Generalization on Entropy-Ruled Charge and Energy Transport for Organic Solids and Biomolecular Aggregates Theoretical ...
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### Current for Anderson-type model in linear response

I would like to raise an issue regarding calculation of current for Anderson-type model as discussed in the corrected version (14 January 2016) of the book "Many-body Quantum Theory in Condensed ...
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### Difference of the Transmission Coefficient between Thermal and Charge Conductance by Nonequilibirum Green Function Method

The equation 57 in the reference [Jian-Sheng Wang, Jian Wang and J. T. Lu, Quantum thermal transport in nanostructures, Eur. Phys. J. B 62, 381 (2008)] explains the the transmission coefficient for ...
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1 vote
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### Confusion about Luttinger's transport coefficients

I've started reading three papers, one by Luttinger, one by Eich and by Tatara, and I'm confused to how they relate to one another. My understanding is that in Luttinger's paper a "gravitational&...
1 vote
240 views

### How to compose scattering matrices?

Imagine I have a scattering region (denoted as sample). Scattering matrix and transfer matrix gives the same information about scattering. The scattering matrix tells us how incoming modes are ...
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### What is procedure for computing effective masses from these three quantities?

Given a reciprocal effective mass tensor in a principle basis $\left[M_E\right]^{-1} = \begin{bmatrix}1/m_l&0&0\\0&1/m_t&0\\0&0&1/m_t\end{bmatrix}$ You can compute the ...
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### A problem in solving a PDE of the time-ordered Green function

In the article written by Jauho in 2006 Introduction to the Keldysh nonequilibrium Green function technique, I've tried to operating with whether $g_{k\alpha}^t$ or $g_{k\alpha}^{-1}$ from right to ...
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### Charge transmission coefficient

Suppose the left lead, right lead and the scattering region are all the same metallic system; such as iron. Why is the charge transimission coefficient must be a positive integer number at any fermi ...
• 173
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### Drude model for electron-hole gas

The Drude formula for the conductivity of the electron gas reads: $$\sigma=\frac{\sigma_0}{1-i\omega \tau}.$$ How should it be modified when the hole or electron-hole gas is under the consideration? ...
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1 vote
130 views

### Double counting and Pauli Exclusion in the semiclassical model of electron dynamics

In the end, I think this question is related to this one (which was never satisfactorily answered), but I extend slightly and therefore am asking a new question. In discussing the semiclassical model ...
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1 vote
80 views

### Nonequilibrium green function for interacting systems

In this book by Ryndyk on quantum transport, p. 89, the retarded single-particle nonequilibrium Green function for a non-interacting nanosystem coupled to semi-infinite reservoirs of non-interacting ...
1 vote
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### Charge conductivity by Non-Equilibrium Green Function Method

I am reading the calculation of charge conductivity by Non-Equilibrium Green Function (NEGF) method in this following paper. Van-Nam Do, Non-equilibirum Green function method: theory and application ...
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### What is the relation between Kubo's formula and the Green-Kubo relations?

In one hand, Kubo's formula is used in linear response quantum mechanics to obtain response functions (conductivity, magnetic susceptibility, dielectric function) and so on in terms of correlation ...
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