83 citations · 323 across the 9 of their papers we have counts for
9 papers
Probing spacetime foam with extragalactic sources
W. A. Christiansen, Y. Jack Ng, H. van Dam
Due to quantum fluctuations, spacetime is probably ``foamy'' on very small scales. We propose to detect this texture of spacetime foam by looking for core-halo structures in the im…
An application of neutrix calculus to quantum field theory
Y. Jack Ng, H. van Dam
Neutrices are additive groups of negligible functions that do not contain any constants except 0. Their calculus was developed by van der Corput and Hadamard in connection with asy…
Neutrix Calculus and Finite Quantum Field Theory
Y. Jack Ng, H. van Dam
In general, quantum field theories (QFT) require regularizations and infinite renormalizations due to ultraviolet divergences in their loop calculations. Furthermore, perturbation…
Probing Planck-scale Physics with Extragalactic Sources?
Y. Jack Ng, W. A. Christiansen, H. van Dam
At Planck-scale, spacetime is "foamy" due to quantum fluctuations predicted by quantum gravity. Here we consider the possibility of using spacetime foam-induced phase incoherence o…
Anomalous particle-production thresholds through systematic and non-systematic quantum-gravity effects
Giovanni Amelino-Camelia, Y. Jack NG, Hendrik Van Dam
A growing number of studies is being devoted to the identification of plausible quantum properties of spacetime which might give rise to observably large effects. The literature on…
Why 3 + 1 metric rather than 4 + 0 or 2 + 2?
H. van Dam, Y. Jack Ng
Why does the physical 4-dimensional space have a 3 + 1 signature rather than a 4 + 0 or a 2 + 2 for its metric? We give a simple explanation based largely on a group-theoretic argu…