On the Minimal Length Uncertainty Relation and the Foundations of String   Theory
  We review our work on the minimal length uncertainty relation as suggested by perturbative string theory. We discuss simple phenomenological implications of the minimal length uncertainty relation and then argue that the combination of the principles of quantum theory and general relativity allow for a dynamical energy-momentum space. We discuss the implication of this for the problem of vacuum energy and the foundations of non-perturbative string theory. 
Lay Nam Chang, Zachary Lewis, Djordje Minic, Tatsu Takeuchi
hep-th gr-qc