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34 lines
993 B
ReStructuredText
34 lines
993 B
ReStructuredText
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.. index::
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single: Transforming Green's functions
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Fourier and Legendre to Matsubara transforms
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============================================
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Here are the different ways to transform Green's functions of one type into a different type.
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Time to frequency
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-----------------
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The command ``Fourier`` (``InverseFourier``) allows you to initialize a block
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Green's function defined in frequency (time) from a block Green's function defined
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in time (frequency). Here's a simple example:
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.. plot:: reference/python/green/fourier.py
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:include-source:
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:scale: 70
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The same command can be used for real-time, real-frequency transformations.
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Legendre to Matsubara
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---------------------
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The commands ``MatsubaraToLegendre`` and ``LegendreToMatsubara`` allow to
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initialize a Matsubara Green's function (either in imaginary time or in
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imaginary frequencies) from a Legendre Green's function and conversely.
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Example:
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.. plot:: reference/python/green/legendre.py
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:include-source:
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:scale: 70
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