mirror of
https://github.com/triqs/dft_tools
synced 2024-11-01 11:43:47 +01:00
41 lines
911 B
ReStructuredText
41 lines
911 B
ReStructuredText
.. _greenfunctions:
|
|
|
|
The Green function class
|
|
========================
|
|
|
|
The TRIQS library has a class called ``gf`` which allows you to use easily a whole set of Green functions.
|
|
|
|
You can use as variable(s)
|
|
|
|
* real time(s),
|
|
|
|
* real frequency(ies),
|
|
|
|
* Matsubara time(s),
|
|
|
|
* Matsubara frequency(ies),
|
|
|
|
* or other variables that you can define.
|
|
|
|
More generally, the variable is a point of a ``domain``
|
|
|
|
The value of the Green function on a point of the domain can be a scalar, a matrix or whatever you want (this type is called type ``target_t``).
|
|
|
|
You can group several green functions into *blocks* (for example, one block per orbital, or per wave vector...).
|
|
|
|
Fourier transforms are implemented for these Green functions:
|
|
|
|
real time <-> real frequency
|
|
|
|
Matsubara time <-> Matsubara frequency
|
|
|
|
|
|
.. toctree::
|
|
:maxdepth: 2
|
|
|
|
concepts
|
|
meshes
|
|
the_four_basic_GFs
|
|
fourier
|
|
cookbook/contents
|