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152 papers · 1 filter
Planckian Gravitons from an Imaginary-Time Clock
Michael R. R. Good, Eric V. Linder
We present a simple derivation of the exact Planck spectrum of the quadrupole radiation from point masses moving apart nonrelativistically, essentially an analog for gravitational…
Self-Reflection in a Moving Mirror
Michael R. R. Good, Eric V. Linder
We present an analytic flat-spacetime accelerating boundary analog of Hawking-type emission that possesses infinite asymptotic acceleration (and radial acceleration in the black ho…
Primordial Black Holes, Charge, and Dark Matter: Rethinking Evaporation Limits
Sebastian Schuster, Jessica Santiago, Justin Feng +1
Limits on the dark matter fraction of small mass primordial black holes from Hawking radiation are predominantly derived from the assumption of a Schwarzschild black hole evaporati…
Dust stars in the minimal exponential measure model
Reyhan D. Lambaga, Justin C. Feng, Norman Hsia +1
We report the existence of horizonless compact object solutions supported by dust in the Minimal Exponential Measure (MEMe) model, a theory which modifies the couplings between gra…
Cosmic Acceleration from Nothing
Michael R. R. Good, Eric V. Linder
We demonstrate that if the universe started as a vacuum fluctuation rather than from a singular Big Bang state, the universe must have a late-time cosmic acceleration. This is requ…
Cosmological constant as an integration constant
Justin C. Feng, Pisin Chen
The discrepancy between the observed value of the cosmological constant (CC) and its expected value from quantum field theoretical considerations motivates the search for a theory…