Internal functions and functionality

AbstractTreeLevelFeynmanDiagram

Abstract base type for FeynmanDiagrams. Must implement the functions

process(::AbstractTreeLevelFeynmanDiagram)::QEDbase.AbstractProcessDefinition
virtual_particles(::AbstractTreeLevelFeynmanDiagram)::NTuple{N, Tuple{QEDbase.AbstractParticleType, BitArray}}

By using the QEDbase.AbstractProcessDefinition interface, the function external_particles is automatically provided.

For more information on what the interface functions should do, see their documentation: process, virtual_particles

_is_index_valid_combination(proc::AbstractProcessDefinition, index::Tuple)

Internal function for DAG generation. Checks for a given process and a spin/pol combination whether the spin/pol combination is part of the process, including checking for QEDbase.SyncedPolarization and QEDbase.SyncedSpin.

_pseudo_virtual_particles

Return a vector of VirtualParticle for each external particle. These are not actually virtual particles, but can be helpful as entry points.

are_total(a::VirtualParticle, b::VirtualParticle, c::VirtualParticle)

Return true if a, b and c combined contain all external particles exactly once.

contains(a::VirtualParticle, b::VirtualParticle)

Returns true if the set of particles contributing to a are contains the set of particles contributing to b.

disjunct(a::VirtualParticle, b::VirtualParticle)

Return true if the momenta contributions of a and b are disjunct.

make_up(a::VirtualParticle, b::VirtualParticle, c::VirtualParticle)

For virtual particles a, b, and c, return true if a and b's joint momentum contributions add up to c's momentum contributions.