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6 papers · 1 filter
Discretization of the Superparticle Path Integral
J. Grundberg, U. Lindstrom, H. Nordstrom
Requiring that the path integral has the global symmetries of the classical action and obeys the natural composition property of path integrals, and also that the discretized actio…
A note on 2D chiral gravity and chiral bosons
Fiorenzo Bastianelli
Quantization of two dimensional chiral matter coupled to gravity induces an effective action for the zweibein field which is both Weyl and Lorentz anomalous. Recently, the quantiza…
Trace Anomalies from Quantum Mechanics
Fiorenzo Bastianelli, Peter van Nieuwenhuizen
The 1-loop anomalies of a d-dimensional quantum field theory can be computed by evaluating the trace of the regulated path integral jacobian matrix, as shown by Fujikawa. In 1983,…
The Probability for Formation of Collapsing Textures and Texture Knots
Stefan Åminneborg
Global textures are interesting because they are promising candidates for seeds in the structure formation of the universe. The important configurations are those who will be able…
Space-Time Symmetries of Quantized Tensionless Strings
J. Isberg, U. Lindström, B. Sundborg
The tensionless limit of the free bosonic string is space-time conformally symmetric classically. Requiring invariance of the quantum theory in the light cone gauge tests the repar…
Explicit Solution to the N-Body Calogero Problem
L. Brink, T. H. Hansson, M. A. Vasiliev
We solve the N-body Calogero problem, \ie N particles in 1 dimension subject to a two-body interaction of the form $\half \sum_{i,j}[ (x_i - x_j)^2 + g/ {(x_i - x_j)^2}]$, by const…