Zobrazeno 1 - 10
of 201
pro vyhledávání: '"Fredenhagen, K."'
Publikováno v:
Phys.Rev.D71:025022,2005
We give a definition of admissible counterterms appropriate for massive quantum field theories on the noncommutative Minkowski space, based on a suitable notion of locality. We then define products of fields of arbitrary order, the so-called quasipla
Externí odkaz:
http://arxiv.org/abs/hep-th/0408204
Publikováno v:
Commun.Math.Phys.237:221-241,2003
We discuss a formulation of quantum field theory on quantum space time where the perturbation expansion of the S-matrix is term by term ultraviolet finite. The characteristic feature of our approach is a quantum version of the Wick product at coincid
Externí odkaz:
http://arxiv.org/abs/hep-th/0301100
Publikováno v:
Phys.Lett.B533:178-181,2002
It is shown that the violation of unitarity observed in space/time noncommutative field theories is due to an improper definition of quantum field theory on noncommutative spacetime.
Comment: 7 pages; typos corrected, sign convention changed on
Comment: 7 pages; typos corrected, sign convention changed on
Externí odkaz:
http://arxiv.org/abs/hep-th/0201222
Autor:
Duetsch, M., Fredenhagen, K.
Publikováno v:
Commun.Math.Phys. 219 (2001) 5-30
The perturbative treatment of quantum field theory is formulated within the framework of algebraic quantum field theory. We show that the algebra of interacting fields is additive, i.e. fully determined by its subalgebras associated to arbitrary smal
Externí odkaz:
http://arxiv.org/abs/hep-th/0001129
Autor:
Duetsch, M., Fredenhagen, K.
Publikováno v:
AIP Conf.Proc.453:324-333,1998
To avoid the problems which are connected with the long distance behavior of perturbative gauge theories we present a local construction of the observables which does not involve the adiabatic limit. First we construct the interacting fields as forma
Externí odkaz:
http://arxiv.org/abs/hep-th/9807215
Autor:
Duetsch, M., Fredenhagen, K.
Publikováno v:
Commun.Math.Phys. 203 (1999) 71-105
Interacting fields can be constructed as formal power series in the framework of causal perturbation theory. The local field algebra $\tilde {\cal F}({\cal O})$ is obtained without performing the adiabatic limit; the (usually bad) infrared behavior p
Externí odkaz:
http://arxiv.org/abs/hep-th/9807078
Autor:
Brunetti, R., Fredenhagen, K.
We present a perturbative construction of the $\varphi^4$ model on a smooth globally hyperbolic space-time. Our method relies on a adaptation of the Epstein and Glaser method of renormalization to curved space-times using techniques from microlocal a
Externí odkaz:
http://arxiv.org/abs/gr-qc/9701048
Publikováno v:
Commun.Math.Phys. 180 (1996) 633-652
Quantum fields propagating on a curved spacetime are investigated in terms of microlocal analysis. We discuss a condition on the wave front set for the corresponding n-point distributions, called ``microlocal spectrum condition'' ($\mu$SC). On Minkow
Externí odkaz:
http://arxiv.org/abs/gr-qc/9510056
Publikováno v:
Commun.Math.Phys. 175 (1996) 319-336
A Haag-Ruelle scattering theory for particles with braid group statistics is developed, and the arising structure of the Hilbert space of multiparticle states is analyzed.
Comment: 18 pages, LATEX, DAMTP-94-90
Comment: 18 pages, LATEX, DAMTP-94-90
Externí odkaz:
http://arxiv.org/abs/hep-th/9410115
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