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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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What exactly is a 2DTI phase? [on hold]

I am reading a paper about the electronic properties of quantum heterostructures and it mentions that "the material can be tuned into a 2DTI phase". I am clueless as to what that means.
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Self-averaging quantities in physics

This question is about self-averaging quantities in physics. For a definition see: https://en.wikipedia.org/wiki/Self-averaging. For concreteness I give an example below. Example Consider a ...
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Advected Dirac comb with random number of teeth which are born and die

I'm looking for a topic which I struggle to put into words. It's a reasonable consideration which I expect has been carefully studied. I hope someone can tell me the name of it and offer some guidance ...
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Link between a LED or laser efficiencies and carrier mobilities

Does anyone know if there is a simple formula/relationship between an LED or laser power conversion efficiencies (PCE) and the carrier mobility. So given everything the same, if I change the ...
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What are major differences in band like electron transport and hopping transport mechanisms ?

How can we differentiate between the transport mechanism for a molecular system through theoretical calculations ?
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Demonstration that electric current at equilibrium is zero

As it is well known, electrons at equilibrium (no external field) do not conduct electric current, i.e. $\int_{BZ} dk\,v_{k}\,f(\epsilon_k)=0$ where $f(\epsilon_k)$ is the Fermi-Dirac distribution $...
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Comparing the Madelung and Groenewold-Moyal pictures of quantum mechanics

We can consider a dynamical theory to be a "transport theory" if it can be described entirely by a series of continuity equations of the form: $$\frac{\partial \rho}{\partial t} + \nabla \cdot \left({...
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Energy and momentum conservation argument for electron-phonon transitions in Bilayer Graphene

I'm reading a paper which says that the interband transitions ($\pi_1^* \rightarrow \pi_2^*$) involving phonons at $q= 0 $ and $ q = K$ in Bilayer Graphene are prohibited by energy and momentum ...
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Kubo formula derivation

In the derivation of the Kubo formula for conductivty we write the total hamiltonian as $$H_{\text{tot}}=H_0+H_{\text{ext}}$$ where $$H_{\text{tot}}=H(A_0+A_{\text{ext}}),$$ $$H_0=H(A_0)$$ and $$H_{\...