feynlag.fields.Field

class feynlag.fields.Field(name, reps=None, component_names=None, real=False, self_conjugate=False, tex=None)[source]

Base class for all fields.

Parameters:

  • name – field name; used as prefix for auto-generated components.

  • reps – dict {GaugeGroup: representation} (charge for a U(1), dimension label for SU(2)/SU(3)).

  • component_names – explicit component names (physics-friendly, e.g. ['H1p', 'H10'] for an SU(2) doublet). Default: name_1 … name_n (or just name for a singlet).

  • real – whether components are real symbols.

  • self_conjugate – particle is its own antiparticle.

  • tex – LaTeX name.

__init__(name, reps=None, component_names=None, real=False, self_conjugate=False, tex=None)[source]

Methods

__init__(name[, reps, component_names, ...])

charge(u1_group)

U(1) charge of this field (0 if not charged under it).

dag()

Hermitian conjugate of the component column: a row Matrix.

generators(group)

Generator matrices of group acting on this field's FULL component space (Kronecker product over all non-abelian reps).

Attributes

dim

Total number of gauge components (product over non-abelian reps).

mat

column matrix of components — use in matrix expressions.