A non-resonant fermion-boson term in the Lehmann representation of ThreePointSusceptibility. More...

#include <ThreePointSusceptibilityPart.hpp>

Data Structures
struct	Hash
	Hasher for non-resonant fermion-boson terms. More...

struct	IsNegligible
	Predicate: Does a term have a negligible residue? More...

struct	KeyEqual
	Similarity predicate for non-resonant fermion-fermion terms. More...

Public Member Functions
	NonResonantFBTerm ()=default

	NonResonantFBTerm (ComplexType Coeff, RealType P1, RealType P12, int xi)

ComplexType	operator() (ComplexType z1, ComplexType z2) const

NonResonantFBTerm &	operator+= (NonResonantFBTerm const &AnotherTerm)

Static Public Member Functions
static MPI_Datatype	mpi_datatype ()
	Create and commit an MPI datatype for NonResonantFBTerm. More...

Data Fields
ComplexType	Coeff
	Coefficient \(C\). More...

RealType	P1 = 0
	Pole \(P_1\). More...

RealType	P12 = 0
	Pole \(P_{12}\). More...

int	xi = 1
	Coefficient \(\xi\). More...

long	Weight = 0

Detailed Description

A non-resonant fermion-boson term in the Lehmann representation of ThreePointSusceptibility.

It is parametrized by a complex coefficient \(C\), positions of real poles \(P_1, P_{12}\) and a coefficient \(\xi\) that controls how the bosonic frequency is computed. An explicit expression for the term reads \(\frac{C}{(z_1-P_1)(z_1 - \xi z_2 - P_{12})}\).

Definition at line 170 of file ThreePointSusceptibilityPart.hpp.

Constructor & Destructor Documentation

◆ NonResonantFBTerm() [1/2]

Pomerol::ThreePointSusceptibilityPart::NonResonantFBTerm::NonResonantFBTerm ( )

default

◆ NonResonantFBTerm() [2/2]

Pomerol::ThreePointSusceptibilityPart::NonResonantFBTerm::NonResonantFBTerm	(	ComplexType	Coeff,
		RealType	P1,
		RealType	P12,
		int	xi
	)

inline

Constructor.

Parameters

[in]	Coeff	Coefficient of the term \(C\).
[in]	P1	Pole \(P_1\).
[in]	P12	Pole \(P_{12}\).
[in]	xi	Coefficient \(\xi\).

Definition at line 254 of file ThreePointSusceptibilityPart.hpp.

Member Function Documentation

◆ mpi_datatype()

static MPI_Datatype Pomerol::ThreePointSusceptibilityPart::NonResonantFBTerm::mpi_datatype ( )

static

Create and commit an MPI datatype for NonResonantFBTerm.

◆ operator()()

ComplexType Pomerol::ThreePointSusceptibilityPart::NonResonantFBTerm::operator()	(	ComplexType	z1,
		ComplexType	z2
	)		const

inline

Substitute complex frequencies \(z_1, z_2\) into this term.

Parameters

[in]	z1	Complex frequency \(z_1\).
[in]	z2	Complex frequency \(z_2\).

Definition at line 525 of file ThreePointSusceptibilityPart.hpp.

◆ operator+=()

NonResonantFBTerm& Pomerol::ThreePointSusceptibilityPart::NonResonantFBTerm::operator+= ( NonResonantFBTerm const & AnotherTerm )

Add a non-resonant fermion-boson term to this term.

This operator does not check similarity of the terms! Parameters of this term are updated as follows.

Coeff += AnotherTerm.Coeff
P = (P1 * Weight + AnotherTerm.P1 * AnotherTerm.Weight) / (Weight + AnotherTerm.Weight)
P12 = (P12 * Weight + AnotherTerm.P12 * AnotherTerm.Weight) / (Weight + AnotherTerm.Weight)
Weight += AnotherTerm.Weight
Parameters

[in] AnotherTerm Term to add.