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A first general restructuration of the doc according to the pattern [tour|tutorial|reference]. In the reference part, objects are documented per topic. In each topic, [definition|c++|python|hdf5] (not yet implemented)
34 lines
911 B
ReStructuredText
34 lines
911 B
ReStructuredText
.. module:: pytriqs.random
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.. _operators:
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Second-quantization operators for many-body Hamiltonians
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===========================================================
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The TRIQS solvers need to know several operators in order to solve the impurity
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problem. For example, they must know what the local Hamiltonian is, but also its
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quantum numbers (that can be used to improve the speed), possibly some
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operators to be averaged, aso.
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In order to deal with these objects, TRIQS provides a class that allows to
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manipulate operators.
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A simple example
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-----------------
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.. runblock:: python
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from pytriqs.operators import *
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H = C('up',1) * Cdag('up',2) + C('up',2) * Cdag('up',1)
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print H
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print H - H.dagger()
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print anti_commutator(C('up'),Cdag('up'))
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print anti_commutator(C('up'),0.5*Cdag('down'))
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Full reference
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------------------------
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.. autoclass:: pytriqs.operators.Operator
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:members:
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