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- Universitätsmedizin GreifswaldDE44 papers
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4 papers · 1 filter
Axial Gauge in Euclidean Quantum Gravity
Ivan G. Avramidi, Giampiero Esposito, Alexander Yu. Kamenshchik
The axial gauge is applied to the analysis of Euclidean quantum gravity on manifolds with boundary. A set of boundary conditions which are completely invariant under infinitesimal…
A model of stable chromomagnetic vacuum in higher-dimensional Yang-Mills theory
Ivan G. Avramidi
We study the effective action in Euclidean Yang-Mills theory with a compact simple gauge group in one-loop approximation assuming a covariantly constant gauge field strength as a b…
Boundary Operators in Euclidean Quantum Gravity
Ivan G. Avramidi, Giampiero Esposito, Alexander Yu. Kamenshchik
Gauge-invariant boundary conditions in Euclidean quantum gravity can be obtained by setting to zero at the boundary the spatial components of metric perturbations, and a suitable c…
Nonperturbative methods for calculating the heat kernel
Ivan G. Avramidi
We study the low-energy approximation for calculation of the heat kernel which is determined by the strong slowly varying background fields in strongly curved quasi-homogeneous man…