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20 papers · 1 filter
Multi-scale Renormalization
C. Ford, C. Wiesendanger
The Standard MS renormalization prescription is inadequate for dealing with multi-scale problems. To illustrate this we consider the computation of the effective potential in the H…
Schroedinger cat-like states by conditional measurements on a beam-splitter
M. Dakna, T. Anhut, T. Opartny +2
A scheme for generating Schrödinger cat-like states of a single-mode optical field by means of conditional measurement is proposed. Feeding into a beam splitter a squeezed vacuum a…
Polyakov-Loops and Fermionic Zero Modes in QCD2 on the Torus
U. G. Mitreuter, J. M. Pawlowski, A. Wipf
A simple derivation of the free energy and expectation values of Polyakov-loops in via path integral methods is given. In the chosen gauge (which can be generalized to 4 di…
The three-boson bound state in the massive Schwinger model
C. Adam
We derive the (matrix-valued) Feynman rules of mass perturbation theory of the massive Schwinger model for non-zero vacuum angle theta. Further, we discuss the properties of the th…
Finite Temperature Schwinger Model with Chirality Breaking Boundary Conditions
Stephan Dürr, Andreas Wipf
The -flavour Schwinger Model on a finite space and subject to bag-type boundary-conditions at und is solved at finite temperature . Th…
Charge screening and confinement in the massive Schwinger model
C. Adam
Within the framework of Euclidean path integral and mass perturbation theory we compute the Wilson loop of widely separated external charges for the massive Schwinger model. From t…