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8 papers · 2 filters
Nambu-Jona-Lasinio approach to realization of confining medium
M. Faber, A. N. Ivanov, N. I. Troitskaya
The mechanism of a confining medium is investigated within the Nambu-Jona-Lasinio (NJL) approach. It is shown that a confining medium can be realized in the bosonized phase of the…
No saturation of the quantum Bogomolnyi bound by two-dimensional supersymmetric solitons
A. Rebhan, P. van Nieuwenhuizen
We reanalyse the question whether the quantum Bogomolnyi bound is saturated in the two-dimensional supersymmetric kink and sine-Gordon models. Our starting point is the usual expre…
Nonperturbative path integral of 2d dilaton gravity and two-loop effects from scalar matter
W. Kummer, H. Liebl, D. V. Vassilevich
Performing an nonperturbative path integral for the geometric part of a large class of 2d theories without kinetic term for the dilaton field, the quantum effects from scalar matte…
Hawking Radiation for Non-minimally Coupled Matter from Generalized 2D Black Hole Models
W. Kummer, H. Liebl, D. V. Vassilevich
It is well known that spherically symmetric reduction of General Relativity (SSG) leads to non-minimally coupled scalar matter. We generalize (and correct) recent results to Hawkin…
A Polynomial First Order Action for the Dirichlet 3-brane
Igor Bandos, Wolfgang Kummer
A new first order action for type IIB Dirichlet 3-brane is proposed. Its form is inspired by the superfield equations of motion obtained recently from the generalized action princi…
P-Branes, Poisson-Sigma-Models and Embedding Approach to (p+1)- Dimensional Gravity
Igor Bandos, Wolfgang Kummer
A generalization of the embedding approach for d-dimensional gravity based upon p-brane theories is considered. We show that the D-dimensional p-brane coupled to an antisymmetric t…