Theoretical construction of Morris-Thorne wormholes compatible with quantum field theory
This paper completes and extends some earlier studies by the author to show that Morris-Thorne wormholes are compatible with quantum field theory. The strategy is to strike a balance between reducing the size of the unavoidable exotic region and the degree of fine-tuning of the metric coefficients required to achieve this reduction, while simultaneously satisfying the constraints from quantum field theory. The fine-tuning also serves to satisfy various traversabilty criteria such as tidal constraints and proper distances through the wormhole. The degree of fine-tuning turns out to be a generic feature of the type of wormhole discussed.