To resolve infrared problems with the de Sitter invariant vacuum, we argue that the history of the de Sitter phase is crucial. We illustrate how either (1) the diagonalization of the Hamiltonian for long-wavelength modes or (2) an explicit modification of the metric in the distant past leads to natural infrared cutoffs. The former case resembles a bosonic superconductor in which graviton-pairin...

Despite the severe criticism expressed by some of the reviewers, after studying their comments and the suggested references, we still believe that our results are original, correct, and potentially important for the systems and control community. Detailed answers to the reviewers’ comments with rebuttal and explanation of the corrections/additions in the revised version of the paper are given i...