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This is an authored directed relation from the source endpoint to the target endpoint.
Relation ID
qed_to_diraccoulomb
Relation type
Effective theory / model effective-theory
Direction
source → target
Endpoint roles
source: Has effective description; target: Effective description of
Authored annotation
no-pair relativistic bound-state Hamiltonian
Authored explanation
The Dirac–Coulomb Hamiltonian is an effective bound-state reduction of QED and is not the full field theory.
How to interpret this relation type
The target retains the degrees of freedom and interactions relevant below a stated scale or within a stated regime, while higher-energy or unresolved degrees of freedom from the source are integrated out, coarse-grained, or encoded in effective couplings.