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K-Theory from a physical perspective
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This is an expository paper which aims at explaining a physical point of view on the K-theoretic classification of D-branes. We combine ideas of renormalization group flows between boundary conformal field theories, together with spacetime notions such as anomaly cancellation and D-brane instanton effects. We illustrate this point of view by describing the twisted K-theory of the special unitary groups SU(N).
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Cited by 2 Pith papers
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A Comment On Topological Degeneracy In Gauged WZW Models
The gauged WZW model is the GKO coset model coupled to a 2d topological field theory whose commutative Frobenius algebra End(B) controls an extra finite degeneracy.
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Generalised Symmetries and Swampland-Type Constraints from Charge Quantisation via Rational Homotopy Theory
Refining charge quantization via a homotopy type A yields swampland-like constraints ruling out noncompact gauge groups and non-nilpotent one-form Lie algebras, and requires A to be contractible for quantum gravity theories.
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