14 citations · 14 across the 3 of their papers we have counts for
6 papers · 1 filter
A note on the center of mass in non-commutative theories
Robert C. Helling
The dynamics of a stack of N D-branes is described by U(N) gauge theory of which the central U(1) describes the center of mass motion and the remaining SU(N) describes the internal…
String quantization: Fock vs. LQG Representations
Robert C. Helling, Giuseppe Policastro
We set up a unified framework to compare the quantization of the bosonic string in two approaches: One proposed by Thiemann, based on methods of loop quantum gravity, and the other…
Complexified moduli of non-commutative instantons
Robert C. Helling
We revisit the generalised ADHM construction for instantons in non-commutative space using a manifestly quaternionic formalism. This leads to an identification of the self-dual par…
A Remark On Field Theories On The Non-Commutative Torus
Robert C. Helling
We investigate field theories on the non-commutative torus upon varying theta, the parameter of non-commutativity. We argue that one should think of Morita equivalence as a symmetr…
Beyond Eikonal Scattering in M(atrix)-Theory
Robert Helling
We study the problem of more general kinematics for the finite N M(atrix)-Model than the simple straight line motion that has been used before. This is supposed to be related to mo…
Supermembranes and M(atrix) Theory
Hermann Nicolai, Robert Helling
In these lectures, we review the D=11 supermembrane and supersymmetric matrix models at an introductory level. We also discuss some more recent developments in connection with non-…