All Questions
9
questions
6
votes
1
answer
486
views
Lattice spacing in lattice QCD
It is known that the lattice spacing in lattice QCD is not an external parameter and needs to be calculated, also the lattice beta parameter scales the lattice spacing ($a$) and goes as a function of ...
- 343
3
votes
1
answer
1k
views
Recommend books for learning lattice QCD
I want to learn lattice QCD by myself, but I don't know how to start. Can you recommend some books for lattice QCD?
5
votes
1
answer
168
views
Temperature-dependence of quark potential in Abelian lattice gauge theory
I am working with Kapusta's "Finite-Temperature Field Theory" textbook, and am working through the first part of chapter 10. When building the correlator of the two quarks a distance $R$ apart in the ...
- 2,665
2
votes
0
answers
126
views
Questions on how Wilson loops relate to field & charge conservation, and lattice QFT
The path-ordered exponential from which the Wilson loop is traced is, crudely,
$$ \prod (I+ A_\alpha dx^\alpha) = \mathcal{P}\,\mathrm{exp}(i \oint A_\alpha dx^\alpha )$$
which returns a matrix $\...
- 970
3
votes
1
answer
171
views
What is the effect of including additional representations in the action of a lattice gauge theory?
I'm reading Introduction to Quantum Fields on a Lattice by Jan Smit. When introducing the lattice gauge-field action as a sum over plaquettes, Smit says that in general the action should include a sum ...
- 223
0
votes
1
answer
681
views
Computation of String Tension in Lattice QCD
There is a quantity called String Tension in lattice QCD calculation.
How is this quantity (String Tension) defined and computed in Lattice QCD? Are there some useful formulas to define it both in ...
- 4,336
0
votes
0
answers
85
views
Instanton effects on condensates: (pseudo)scalars, (pseudo)vectors, tensor
I have heard that the instanton effect in quark matter causes the di-quark condensate to be Lorentz scalar. As opposed to the Lorentz scalar, there are possibilities that the condensates are Lorentz ...
- 4,336
1
vote
1
answer
269
views
Lattice QFT: Non-homogenous lattice spacing
I am interested why we fix the lattice spacing, $a$ to be homogenous in all dimensions. After a Wick rotation, $a=i \epsilon$ where $\epsilon=t_{i+1} - t_{i}$ and with euclidean time given by $\tau = ...
4
votes
1
answer
235
views
Has confinement been experimentally observed? [closed]
So, confinement has obviously been shown by lattice gauge theory to be a predicted aspect of QCD. However, to what extent has it been observed in experimental physics?
- 169