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Results tagged with linear-systems
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user 11712
A linear system is a mathematical model of a system based on the use of a linear operator. A system is linear if and only if it satisfies the superposition principle, or equivalently both the additivity and homogeneity properties, without restrictions.
8
votes
2
answers
688
views
Many faces of linear response theory
I have seen two forms of linear response:
One is in the calculation of susceptibilities using Green functions.
The other is in the evaluation of response currents, say, London current of a superco …
- 1,995
7
votes
1
answer
7k
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What is the Laughlin argument?
The fundamental question is
Why is Hall conductance quantized?
Let's start with the Hall bar, a 2D metal bar subject to a strong perpendicular magnetic field $B_0$. Let current $I$ flow in the x …
- 1,995