65 citations
6 papers
Real-time dynamics at finite temperature by DMRG: A path-integral approach
J. Sirker, A. Klümper
We propose a path-integral variant of the DMRG method to calculate real-time correlation functions at arbitrary finite temperatures. To illustrate the method we study the longitudi…
Boundary susceptibility in the open XXZ-chain
Michael Bortz, Jesko Sirker
In the first part we calculate the boundary susceptibility in the open -chain at zero temperature and arbitrary magnetic field by Bethe ansatz. We present analytical…
Framed quiver moduli, cohomology, and quantum groups
Markus Reineke
Framed quiver moduli parametrize stable pairs consisting of a quiver representation and a map to a fixed graded vector space. Geometric properties and explicit realizations of fram…
Classification of semistable sheaves on a rational curve with one node
Sergey Mozgovoy
We classify (semi)stable sheaves on a rational curve with one node. The results are based on the classification of indecomposable torsion-free sheaves due to Drozd and Greuel "Tame…
Philosophy as a cultural resource and medium of reflection for Hermann Weyl
Erhard Scholz
Here we review a kind of post-World-War-II "Nachtrag" to H. Weyl's philosophical comments on mathematics and the natural sciences published in the middle of the 1920s. In a talk gi…
Introducing Groups into Quantum Theory (1926 -- 1930)
Erhard Scholz
In the second half of the 1920s, physicists and mathematicians introduced group theoretic methods into the recently invented ``new'' quantum mechanics. Group representations turned…