..
   Generated automatically by cpp2rst

.. highlight:: c
.. role:: red
.. role:: green
.. role:: param


.. _triqs_ctseg__measure_gw:

triqs_ctseg::measure_gw
=======================

*#include <triqs_ctseg.hpp>*

.. rst-class:: cppsynopsis

      class  :red:`measure_gw`

 measures Fourier transform of :math:`G(\tau)` and :math:`F(\tau)`
Measurement of


.. math::
		X^\sigma_a(i\omega_n) = \int_0^\beta d\tau\, e^{i\omega_n\tau}
 X^\sigma_a(\tau)

..


 with :math:`X=G,F` defined in [[measure_gt]].

The switches for these measurements are ``measure_gw`` and ``measure_fw``. The
 number of frequencies is specified through ``n_w``.

This implementation uses [[precompute_fprefactor]].

The self-energy is automatically computed at the end of the simulations as


.. math::
		\Sigma_{ab}^{\sigma}(i\omega_{n})=\sum_c
 F_{ac}^{\sigma}(i\omega_{n})\left[G^{-1}\right]_{cb}^{\sigma}(i\omega_{n})

..


 if the measurement of the improved estimator is turned on, or


.. math::
		\Sigma_{ab}^{\sigma}(i\omega_{n})\equiv\left[\mathcal{G}^{-1}\right]_{ab}^{\sigma}(i\omega_{n})-\left[G^{-1}\right]_{ab}^{\sigma}(i\omega_{n})

..


 otherwise.


Public members
--------------

.. table::
   :widths: 40 60


   +------------------+------------------------------------------+--+
   | params           | const triqs_ctseg::qmc_parameters *      |  |
   +------------------+------------------------------------------+--+
   | p                | const triqs_ctseg::solve_params_t *      |  |
   +------------------+------------------------------------------+--+
   | config           | const triqs_ctseg::configuration *       |  |
   +------------------+------------------------------------------+--+
   | gw               | block_gf<triqs::mesh::imfreq> &          |  |
   +------------------+------------------------------------------+--+
   | fw               | block_gf<triqs::mesh::imfreq> &          |  |
   +------------------+------------------------------------------+--+
   | sigmaw           | block_gf<triqs::mesh::imfreq> &          |  |
   +------------------+------------------------------------------+--+
   | g0w              | block_gf_const_view<triqs::mesh::imfreq> |  |
   +------------------+------------------------------------------+--+
   | fprefactor       | std::shared_ptr<precompute_fprefactor>   |  |
   +------------------+------------------------------------------+--+
   | n_w              | int                                      |  |
   +------------------+------------------------------------------+--+
   | beta             | double                                   |  |
   +------------------+------------------------------------------+--+
   | Z                | double                                   |  |
   +------------------+------------------------------------------+--+
   | c_exp            | vector<dcomplex>                         |  |
   +------------------+------------------------------------------+--+
   | cdag_exp         | vector<dcomplex>                         |  |
   +------------------+------------------------------------------+--+
   | c_inner_index    | vector<int>                              |  |
   +------------------+------------------------------------------+--+
   | cdag_inner_index | vector<int>                              |  |
   +------------------+------------------------------------------+--+


Member functions
----------------

.. table::
   :widths: 40 60


   +-------------------------------------------------------------------+--+
   | :ref:`(constructor) <triqs_ctseg__measure_gw__constructor>`       |  |
   +-------------------------------------------------------------------+--+
   | :ref:`accumulate <triqs_ctseg__measure_gw__accumulate>`           |  |
   +-------------------------------------------------------------------+--+
   | :ref:`collect_results <triqs_ctseg__measure_gw__collect_results>` |  |
   +-------------------------------------------------------------------+--+

.. toctree::
    :hidden:

    measure_gw/constructor
    measure_gw/accumulate
    measure_gw/collect_results