Speaker
Description
The recently proposed Swampland Cobordism Conjecture predicts the existence of new non-supersymmetric objects in string theory. We argue that the asymptotic profile of a conjectured target space domain wall separating the type IIA and type IIB string theories can be characterized in terms of a string worldsheet interface with different GSO projections on each side. Similar considerations hold for GSO defects in the Spin(32)/Z2 heterotic theory where the strong coupling dual of such a domain wall is the (known) non-BPS D8 brane in type I string theory. Furthermore, we find evidence that the endpoint of collapse for a bubble configuration of the IIA/IIB wall is a non-supersymmetric R7 brane of Type II string theory, providing evidence for its stability.
