T-duality and Penrose limits of spatially homogeneous and inhomogeneous cosmologies

Kerstin E. Kunze
2003 Physical Review D, Particles and fields  
Penrose limits of inhomogeneous cosmologies admitting two abelian Killing vectors and their abelian T-duals are found in general. The wave profiles of the resulting plane waves are given for particular solutions. Abelian and non-abelian T-duality are used as solution generating techniques. Furthermore, it is found that unlike in the case of abelian T-duality, non-abelian T-duality and taking the Penrose limit are not commutative procedures.
doi:10.1103/physrevd.68.063517 fatcat:htzzpdnaj5aennyxhamlki7if4