Zobrazeno 1 - 10
of 228
pro vyhledávání: '"Fredenhagen, Klaus"'
Autor:
Buchholz, Detlev, Fredenhagen, Klaus
Algebraic quantum field theory is a general mathematical framework for relativistic quantum physics, based on the theory of operator algebras. It comprises all observable and operational aspects of a theory. In its framework the entire state space of
Externí odkaz:
http://arxiv.org/abs/2305.12923
Autor:
Buchholz, Detlev, Fredenhagen, Klaus
Based on the hypothesis that the (non-reversible) arrow of time is intrinsic in any system, no matter how small, the consequences are discussed. Within the framework of local quantum physics it is shown how such a semi-group action of time can consis
Externí odkaz:
http://arxiv.org/abs/2305.11709
Despite the fact that quantum gravity is non-renormalisable, a consistent and mathematically rigorous construction of a perturbation series is possible. This is based on the use of the Batalin-Vilkovisky-Becchi-Rouet-Stora-Tyutin formalism for gauge
Externí odkaz:
http://arxiv.org/abs/2212.07800
The C*-algebraic construction of QFT by Buchholz and one of us relies on the causal structure of spacetime and a classical Lagrangian. In one of our previous papers we have introduced additional structure into this construction, namely an action of s
Externí odkaz:
http://arxiv.org/abs/2210.05908
The C*-algebraic formulation of generic interacting quantum field theories, recently presented by Detlev Buchholz and one of the authors (KF), is enriched by a unitary version of the Master Ward Identity, which was postulated some time ago by Franz M
Externí odkaz:
http://arxiv.org/abs/2108.13336
We extend the $C^*$-algebraic approach to interacting quantum field theory, proposed recently by Detlev Buchholz and one of us (KF) to Fermi fields. The crucial feature of our approach is the use of auxiliary Grassmann variables in a functorial way.<
Externí odkaz:
http://arxiv.org/abs/2103.05740
Autor:
Buchholz, Detlev, Fredenhagen, Klaus
The framework of dynamical C*-algebras for scalar fields in Minkowski space, based on local scattering operators, is extended to theories with locally perturbed kinetic terms. These terms encode information about the underlying spacetime metric, so t
Externí odkaz:
http://arxiv.org/abs/2008.02034
We construct states describing Bose Einstein condensates at finite temperature for a relativistic massive complex scalar field with $|\varphi|^4$-interaction. We start with the linearised theory over a classical condensate and construct interacting f
Externí odkaz:
http://arxiv.org/abs/1911.01829
Autor:
Buchholz, Detlev, Fredenhagen, Klaus
The essence of the path integral method in quantum physics can be expressed in terms of two relations between unitary propagators, describing perturbations of the underlying system. They inherit the causal structure of the theory and its invariance p
Externí odkaz:
http://arxiv.org/abs/1905.04250
Autor:
Buchholz, Detlev, Fredenhagen, Klaus
Based on the assumption that time evolves only in one direction and mechanical systems can be described by Lagrangeans, a dynamical C*-algebra is presented for non-relativistic particles at atomic scales. Without presupposing any quantization scheme,
Externí odkaz:
http://arxiv.org/abs/1905.02711