Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Grundling, Hendrik"'
Autor:
Grundling, Hendrik, Neeb, Karl-Hermann
We analyze existence of crossed product constructions of Lie group actions on C^*-algebras which are singular. These are actions where the group need not be locally compact, or the action need not be strongly continuous. In particular, we consider th
Externí odkaz:
http://arxiv.org/abs/1809.09781
Publikováno v:
Dissertationes Mathematicae, Vol. 549, 1-94 (2020)
Singular actions on C*-algebras are automorphic group actions on C*-algebras, where the group need not be locally compact, or the action need not be strongly continuous. We study the covariant representation theory of such actions. In the usual case
Externí odkaz:
http://arxiv.org/abs/1708.01028
Autor:
Grundling, Hendrik, Rudolph, Gerd
We prove the existence of the dynamics automorphism group for Hamiltonian QCD on an infinite lattice in R^3, and this is done in a C*-algebraic context. The existence of ground states is also obtained. Starting with the finite lattice model for Hamil
Externí odkaz:
http://arxiv.org/abs/1512.06319
Autor:
Buchholz, Detlev, Grundling, Hendrik
This survey article is concerned with the modeling of the kinematical structure of quantum systems in an algebraic framework which eliminates certain conceptual and computational difficulties of the conventional approaches. Relying on the Heisenberg
Externí odkaz:
http://arxiv.org/abs/1306.0860
Autor:
Grundling, Hendrik, Neeb, Karl-Hermann
We consider group actions of topological groups on C*-algebras of the types which occur in many physics models. These are singular actions in the sense that they need not be strongly continuous, or the group need not be locally compact. We develop a
Externí odkaz:
http://arxiv.org/abs/1210.3409
Autor:
Buchholz, Detlev, Grundling, Hendrik
This paper analyzes the action {\delta} of a Lie algebra X by derivations on a C*-algebra A. This action satisfies an "almost inner" property which ensures affiliation of the generators of the derivations {\delta} with A, and is expressed in terms of
Externí odkaz:
http://arxiv.org/abs/1202.2780
Autor:
Grundling, Hendrik, Rudolph, Gerd
We construct a mathematically well--defined framework for the kinematics of Hamiltonian QCD on an infinite lattice in $\R^3$, and it is done in a C*-algebraic context. This is based on the finite lattice model for Hamiltonian QCD developed by Kijowsk
Externí odkaz:
http://arxiv.org/abs/1108.2129
Autor:
Grundling, Hendrik, Neeb, Karl-Hermann
The construction of an infinite tensor product of the C*-algebra C_0(R) is not obvious, because it is nonunital, 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), d
Externí odkaz:
http://arxiv.org/abs/1001.1012
Autor:
Grundling, Hendrik, Neeb, Karl-Hermann
Publikováno v:
Lett.Math.Phys.93:169-185,2010
The classical matter fields are sections of a vector bundle E with base manifold M. The space L^2(E) of square integrable matter fields w.r.t. a locally Lebesgue measure on M, has an important module action of C_b^\infty(M) on it. This module action
Externí odkaz:
http://arxiv.org/abs/1001.1010
Autor:
Buchholz, Detlev, Grundling, Hendrik
The standard C*-algebraic version of the algebra of canonical commutation relations, the Weyl algebra, frequently causes difficulties in applications since it neither admits the formulation of physically interesting dynamical laws nor does it incorpo
Externí odkaz:
http://arxiv.org/abs/0705.1988