Seminare über Quantenfeldtheorie

Kontakt: K.-H. Rehren

I present how QCD has been introduced and will be completed in the future by solving the strong CP problem. If the axion solves the strong CP problem, it can constitute the dark matter of our universe. I introduce two existing claims for its existence. I also compare it with another dark matter candidate, the LSP of supersymmetric models, and point out its feasibility in the LHC era

Kontakt: Prof. Laura Covi

The construction of an infinite tensor product of the C*-algebra C_0(R) is not obvious, because it has no unit, and it has no nonzero projection. Based on a choice of an approximate identity, we construct here an infinite tensor product of C_0(R), denoted L_V, and use it to find (partial) group algebras for the full continuous representation theory of R^(N). We obtain an interpretation of the Bochner–Minlos theorem in R^(N) as the pure state space decomposition of the partial group algebras which generate L_V. We analyze the representation theory of L_V, and show that there is a bijection between a natural set of representations of L_V and Rep(R^(N),H) , but that there is an extra part which essentially consists of the representation theory of a multiplicative semigroup Q which depends on the initial choice of approximate identity.

Kontakt: K.-H. Rehren

Kontakt: K.-H. Rehren