Questions tagged [fermi-liquids]
Fermi liquid theory (also known as Landau–Fermi liquid theory) is a theoretical model of interacting fermions that describes the normal state of most metals at sufficiently low temperatures. The phenomenological theory of Fermi liquids was introduced by the Soviet physicist Lev Davidovich Landau in 1956.
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Why is the density of the Fermi gas in a neutron star not changing the potential depth caused by the strong nuclear interaction?
In some textbooks, the neutron star is explained as a degenerate Fermi gas. To calculate the degenerate pressure of the neutron fermi gas the average Energy of a neutron, U is calculated when the ...
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The "dangerous" fixed points for Renormalization Group
What is the definition of dangerously irrelevant renormalization-group (RG) fixed point?
What are some examples of dangerously irrelevant RG fixed points?
Do we also have the use of dangerously ...
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Why gapped systems are called incompressible?
I study quantum Hall systems and I haven't studied Fermi liquid theory yet. But I understand the concept of having gap or being gapless. But why do we use the term incompressibility to correspond the ...
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No Lagrangian description v.s. No quasi-particle description
This post is aimed to stimulate some discussions.
We are familiar with many physical descriptions and theories of the (many-body quantum) system, with both quasi-particle description and Lagrangian ...
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What is the shape of a band electron in momentum space?
Band electrons occupy adjacent sharply defined momentum states that in xyz space take the form of a spectrum of wave functions. These wave functions span the entire xyz volume of any compact unit of ...
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Total energy of a simple fermi gas
I am a student and working on a fermi gas problem.
I already figured out how to calculate the fermi energy of my idealized (no interactions) fermi sphere gas of radius R, but now I want to find out ...
