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RecursionSelfEnergy |  |
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| DirectSelfEnergy | KrylovSelfEnergy |
RecursionSelfEnergy — Class for representing a self energy calculation using the recursion method.
Constructor for a self-energy calculator based on the Recursion method. The Recursion is an iterative scheme for getting self energies, with convergence O(2^N)
If True, the self energies are stored between iterations for maximum speed.
Type: Boolean (True/False)
Default:
True
The tolerance of convergence of the self energies before termination of the recursion.
Type: Strictly positive float.
Default:
1e-13
The maximum number of recursion steps allowed before termination.
Type: Positive integer.
Default:
400
A RecursionSelfEnergy object provides the following methods:
maximumIteration(): Query method for getting the maximum iteration
saveSelfEnergies(): Query method for getting the Boolean telling if the self energies should be saved or not
setSaveSelfEnergies(): Set method for setting the Boolean telling if the self energies should be saved or not
tolerance(): Query method for getting the tolerance
Define that the self energy on the complex contour is calculated with the recursion method, and the self energies are not saved.
calculator=DeviceHuckelCalculator(
self_energy_calculator_complex=RecursionSelfEnergy(
save_self_energies=false) )
The RecusionSelfEnergy uses the iterative scheme by Lopez, Lopez and Rubio[12] for calculating the self energy matrix.
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| DirectSelfEnergy |
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KrylovSelfEnergy |