4 papers
The path towards manifest background independence
Sabbir Rahman
The set of string vertices is extended to include moduli spaces with genus and numbers of ordinary and special punctures ranging over all integral values . It is a…
Geometrising the closed string field theory action
Sabbir Rahman
We complete the set of string vertices of non-negative dimension by introducing in a consistent manner those moduli spaces which had previously been excluded. As a consequence we o…
String Vertices and Inner Derivations
Sabbir Rahman
We show that it is algebraically consistent to express some string field theory operators as inner derivations of the B-V algebra of string vertices. In this approach, the recursio…
Consistency of Quantum Background Independence
Sabbir Rahman
We analyse higher order background independence conditions arising from multiple commutators of background deformations in quantum closed string field theory. The conditions are sh…