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- German Research Centre for Artificial IntelligenceDE125 papers
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25 papers · 1 filter
Particle with torsion on 3d null-curves
A. Nersessian, R. Manvelyan, H. J. W. Mueller-Kirsten
We consider a (2+1)-dimensional mechanical system with the Lagrangian linear in the torsion of a light-like curve. We give Hamiltonian formulation of this system and show that its…
Self-Duality of Various Chiral Boson Actions
Yan-Gang Miao, H. J. W. Mueller-Kirsten
The duality symmetries of various chiral boson actions are investigated using D=2 and D=6 space-time dimensions as examples. These actions involve the Siegel, Floreanini-Jackiw, Sr…
The role of infrared divergence for decoherence
Joachim Kupsch
Continuous and discrete superselection rules induced by the interaction with the environment are investigated for a class of exactly soluble Hamiltonian models. The environment is…
On the thermodynamics of the 2+1 dimensional Gross-Neveu model with complex chemical potential
H. R. Christiansen, A. C. Petkou, M. B. Silva Neto +1
We study the thermodynamics of the 2+1 dimensional Gross-Neveu model in the presence of a chemical potential by introducing a representation for the canonical partition function wh…
Winding number transitions at finite temperature in the Abelian-Higgs model
D. K. Park, H. J. W. Müller-Kirsten, J. Q. Liang
Following our earlier investigations we examine the quantum-classical winding number transition in the Abelian-Higgs system. It is demonstrated that the sphaleron transition in thi…
Winding Number Transitions in the Mottola-Wipf Model on a Circle
D. K. Park, H. J. W. Müller-Kirsten, J. -Q. Liang
Winding number transitions from quantum to classical behavior are studied in the case of the {1+1} dimensional Mottola-Wipf model with the space coordinate on a circle for explorin…