179 citations · 346 across the 6 of their papers we have counts for
6 papers
Ultracold atomic quantum gases far from equilibrium
T. Gasenzer, J. Berges, M. G. Schmidt +1
We calculate the time evolution of a far-from-equilibrium initial state of a non-relativistic ultracold Bose gas in one spatial dimension. The non-perturbative approximation scheme…
Determinant Calculations with Random Walk Worldline Loops
Michael G. Schmidt, Ion-Olimpiu Stamatescu
We propose to calculate bosonic and fermionic determinants with some general field background, and the corresponding 1-loop effective actions by evaluating random walk worldline lo…
The Two-Loop Euler-Heisenberg Lagrangian in Dimensional Renormalization
Denny Fliegner, Martin Reuter, Michael G. Schmidt +1
We clarify a discrepancy between two previous calculations of the two-loop QED Euler-Heisenberg Lagrangian, both performed in proper-time regularization, by calculating this quanti…
Multiloop Calculations in the String-Inspired Formalism: The Single Spinor-Loop in QED
Michael G. Schmidt, Christian Schubert
We use the worldline path-integral approach to the Bern-Kosower formalism for developing a new algorithm for calculation of the sum of all diagrams with one spinor loop and fixed n…
On the Configuration Space of Gauge Theorie
S. J. Fuchs, M. G. Schmidt, C. Schweigert
We investigate the structure of the configuration space of gauge theories and its description in terms of the set of absolute minima of certain Morse functions on the gauge orbits.…
On the Calculation of Effective Actions by String Methods
M. G. Schmidt, C. Schubert
Strassler's formulation of the string-derived Bern-Kosower formalism is reconsidered with particular emphasis on effective actions and form factors. Two- and three point form facto…