Lattice surgery is reformulated as colimits in chain complexes and Hopf algebra (co)multiplication, enabling automated low-overhead logical measurements on quantum LDPC codes and an algebraic theory of boundaries in quantum double models.
First, we have V• C• W• R• g• f• q• p• Giving R• = F9 2 F14 2 F4 2 ∂R• 2 ∂R• 1 with R2 = W2⊕C2, as V2 = 0
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Homology, Hopf Algebras and Quantum Code Surgery
Lattice surgery is reformulated as colimits in chain complexes and Hopf algebra (co)multiplication, enabling automated low-overhead logical measurements on quantum LDPC codes and an algebraic theory of boundaries in quantum double models.