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5 papers · 2 filters
Observable Signatures of a Classical Transition
Matthew C. Johnson, Wei Lin
Eternal inflation arising from a potential landscape predicts that our universe is one realization of many possible cosmological histories. One way to access different cosmological…
Dark Matter Halos as Particle Colliders: A Unified Solution to Small-Scale Structure Puzzles from Dwarfs to Clusters
Manoj Kaplinghat, Sean Tulin, Hai-Bo Yu
Astrophysical observations spanning dwarf galaxies to galaxy clusters indicate that dark matter (DM) halos are less dense in their central regions compared to expectations from col…
Forecasting constraints from the cosmic microwave background on eternal inflation
Stephen M. Feeney, Franz Elsner, Matthew C. Johnson +1
We forecast the ability of cosmic microwave background (CMB) temperature and polarization datasets to constrain theories of eternal inflation using cosmic bubble collisions. Using…
Tensor Modes in Bigravity: Primordial to Present
Matthew Johnson, Alexandra Terrana
Massive bigravity, a theoretically consistent modification of general relativity with an additional dynamical rank two tensor, successfully describes the observed accelerated expan…
Testing eternal inflation with the kinetic Sunyaev Zel'dovich effect
Pengjie Zhang, Matthew C. Johnson
Perhaps the most controversial idea in modern cosmology is that our observable universe is contained within one bubble among many, all inhabiting the eternally inflating multiverse…