All Questions
Tagged with fermi-liquids quantum-field-theory
6
questions
0
votes
1
answer
74
views
Pauli Exclusion Principle in Landau Fermi's liquid theory
I do not understand how Pauli exclusion principle helps us to understand the excitations in Landau Fermi's liquid theory. In Landau Fermi liquid theory, Pauli exclusion principle and adiabatic ...
- 413
1
vote
1
answer
108
views
Is is possible to extract an effective Hamiltonian from a Boltzmann equation (or any other kinetic theories)?
I got kind of confused when reading Xiaogang Wen's famous textbook Quantum Field Theory of Many-body Systems. In Section 5.3.3 the book claims that
From a kinetic theory of Fermi liquid (a Boltzmann ...
- 351
2
votes
0
answers
144
views
Why do we study fermi system at half-filling state?
I am reading Shankar's paper on RG for interacting fermions and in the paper, all study is done on Fermi system at half-filling state. Is there any specific reason why? Also, does it make a different ...
- 21
9
votes
0
answers
1k
views
Failure of Hertz-Millis-Moriya theory for quantum phenomena
In the quantum critical phenomena of condensed matter, the earlier work by Hertz, Moriya and Millis develope the the Hertz-Millis-Moriya (HMM) theory of quantum phase transition.
Naively, they ...
- 7,848
12
votes
2
answers
1k
views
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 ...
- 7,848
3
votes
1
answer
1k
views
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 ...
- 7,848