Zobrazeno 1 - 10
of 459
pro vyhledávání: '"Hofheinz F"'
Publikováno v:
Fortsch.Phys. 53 (2005) 418-425
We present non-perturbative results for U(1) gauge theory in spaces, which include a non-commutative plane. In contrast to the commutative space, such gauge theories involve a Yang-Mills term, and the Wilson loop is complex on the non-perturbative le
Externí odkaz:
http://arxiv.org/abs/hep-th/0501147
We present preliminary simulation results for QED in a non-commutative 4d space-time, which is discretized to a fuzzy lattice. Its numerical treatment becomes feasible after its mapping onto a dimensionally reduced twisted Eguchi-Kawai matrix model.
Externí odkaz:
http://arxiv.org/abs/hep-lat/0409059
We present a numerical study of the \lambda \phi^{4} model in three Euclidean dimensions, where the two spatial coordinates are non-commutative (NC). We first show the explicit phase diagram of this model on a lattice. The ordered regime splits into
Externí odkaz:
http://arxiv.org/abs/hep-th/0407012
Publikováno v:
JHEP0406:042,2004
We present a non-perturbative study of the \lambda \phi^{4} model in a three dimensional Euclidean space, where the two spatial coordinates are non-commutative. Our results are obtained from numerical simulations of the lattice model, after its mappi
Externí odkaz:
http://arxiv.org/abs/hep-th/0404020
Autor:
Hofheinz, F.
Publikováno v:
Fortsch.Phys. 52 (2004) 391-445
The 2d gauge theory on the lattice is equivalent to the twisted Eguchi-Kawai model, which we simulated at N ranging from 25 to 515. We observe a clear large N scaling for the 1- and 2-point function of Wilson loops, as well as the 2-point function of
Externí odkaz:
http://arxiv.org/abs/hep-th/0403117
Publikováno v:
Acta Phys.Polon. B34 (2003) 4711-4726
In the recent years, field theory on non-commutative (NC) spaces has attracted a lot of attention. Most literature on this subject deals with perturbation theory, although the latter runs into grave problems beyond one loop. Here we present results f
Externí odkaz:
http://arxiv.org/abs/hep-th/0309216
The UV/IR mixing in the \lambda \phi^4 model on a non-commutative (NC) space leads to new predictions in perturbation theory, including Hartree-Fock type approximations. Among them there is a changed phase diagram and an unusual behavior of the corre
Externí odkaz:
http://arxiv.org/abs/hep-th/0309182
Publikováno v:
Fortsch.Phys. 51 (2003) 745-752
We investigate two models in non-commutative (NC) field theory by means of Monte Carlo simulations. Even if we start from the Euclidean lattice formulation, such simulations are only feasible after mapping the systems onto dimensionally reduced matri
Externí odkaz:
http://arxiv.org/abs/hep-th/0212258
Non-commutative (NC) field theories can be mapped onto twisted matrix models. This mapping enables their Monte Carlo simulation, where the large N limit of the matrix models describes the continuum limit of NC field theory. First we present numeric r
Externí odkaz:
http://arxiv.org/abs/hep-lat/0209021
Publikováno v:
JHEP0209:009,2002
We perform a non-perturbative study of pure gauge theory in a two dimensional non-commutative (NC) space. On the lattice, it is equivalent to the twisted Eguchi-Kawai model, which we simulated at N ranging from 25 to 515. We observe a clear large-N s
Externí odkaz:
http://arxiv.org/abs/hep-th/0203151