Výsledky vyhledávání - "Schroeder, Oliver"

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Autor: Heinzl, Thomas, Schroeder, Oliver

Publikováno v: J.Phys.A39:11623-11646,2006

We address the issue of large-order expansions in strong-field QED. Our approach is based on the one-loop effective action encoded in the associated photon polarisation tensor. We concentrate on the simple case of crossed fields aiming at possible ap

Externí odkaz: http://arxiv.org/abs/hep-th/0605130

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Quantum stabilization of Z-strings in the electroweak model

Autor: Schroeder, Oliver

Publikováno v: J.Phys. A39 (2006) 6733-6740

We study the quantum energy of the Z-string in 2+1 dimensions using the phase shift formalism. Our main interest is the question of stability of a Z-string carrying a finite fermion number.
Comment: 8 pages LaTex, talk presented at the 7th Works

Externí odkaz: http://arxiv.org/abs/hep-th/0601196

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Generalized Random Phase Approximation and Gauge Theories

Autor: Schroeder, Oliver, Reinhardt, Hugo

Publikováno v: Annals Phys. 307 (2003) 452-506

Mean-field treatments of Yang-Mills theory face the problem of how to treat the Gauss law constraint. In this paper we try to face this problem by studying the excited states instead of the ground state. For this purpose we extend the operator approa

Externí odkaz: http://arxiv.org/abs/hep-ph/0306244

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Kamlah Expansion and Gauge Theories

Autor: Schroeder, Oliver, Reinhardt, Hugo

Publikováno v: Annals Phys. 312 (2004) 319-353

In Yang-Mills theories, variational calculations of the Rayleigh-Ritz type face the problem that on the one hand, calculability puts severe constraints on the space of test wave functionals; on the other hand, the test wave functionals have to be gau

Externí odkaz: http://arxiv.org/abs/hep-ph/0207119

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