Implications for the Cosmological Landscape: Can Thermal Inputs from a   Prior Universe Account for Relic Graviton Production?
  We present a way to accomodate relic graviton production via worm hole transitions of prior universe thermal / energy density values to our present universe. This is done in the context of providing a mechanism for thermally driven relic gravitons, and also to explain how Park's 2003 observation as to how a thermally scaled vacuum energy value plays a role in forming the early universe emergent field dynamics 
A. W. Beckwith