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ThePEG  2.1.5
ThePEG::RhoDMatrix Class Reference

The RhoDMatrix class is designed to implement the storage of the rho and D matrices which are required for the spin correlation algorithm. More...

#include <RhoDMatrix.h>

Public Member Functions

Standard constructors and destructors.
 RhoDMatrix ()=default
 Default constructor with undefined spin.
 
 RhoDMatrix (PDT::Spin inspin, bool average=true)
 Standard constructor giving the spin as 2s+1. More...
 
Access matrix elements.
Complex operator() (size_t ix, size_t iy) const
 Return an element of the matrix.
 
Complexoperator() (size_t ix, size_t iy)
 Set an element of the matrix.
 
void normalize ()
 renormalise the matrix so it has unit trace
 
Access the spin.
PDT::Spin iSpin () const
 Get the spin. More...
 

Private Types

enum  { MAXSPIN = 5 }
 Spin matrix size.
 

Private Attributes

PDT::Spin _spin
 2s+1 for the particle.
 
size_t _ispin
 Storage of 2s+1 for speed.
 
std::array< std::array< Complex, MAXSPIN >, MAXSPIN > _matrix
 Storage for the matrix allowing up to spin 2 particles.
 

Friends

ostream & operator<< (ostream &os, const RhoDMatrix &rd)
 Output the spin density matrix for debugging purposes.
 

Detailed Description

The RhoDMatrix class is designed to implement the storage of the rho and D matrices which are required for the spin correlation algorithm.

The matrix stores the spin as 2s+1.

Author
Peter Richardson

Definition at line 28 of file RhoDMatrix.h.

Constructor & Destructor Documentation

◆ RhoDMatrix()

ThePEG::RhoDMatrix::RhoDMatrix ( PDT::Spin  inspin,
bool  average = true 
)
inline

Standard constructor giving the spin as 2s+1.

The matrix starts out averaged, unless the second argument is false, when it is zeroed.

Definition at line 43 of file RhoDMatrix.h.

References _ispin, and _matrix.

Member Function Documentation

◆ iSpin()

PDT::Spin ThePEG::RhoDMatrix::iSpin ( ) const
inline

Get the spin.

The spin is returned as 2J+1 in units of hbar/2.

Definition at line 100 of file RhoDMatrix.h.

References _spin, and operator<<.


The documentation for this class was generated from the following file: