6 citations · 7 across the 7 of their papers we have counts for
7 papers
Ghost Degrees of Freedom Without Quantum Runaway: Exact Moment Bounds from an Operator Conservation Law
Christopher Ewasiuk, Stefano Profumo
We prove an exact quantum conservation law for a harmonic oscillator coupled to a ghost degree of freedom: a second classical conserved quantity lifts to a quantum operator that co…
High-frequency gravitational wave transients from superradiance
Henry Su, Lucas Brown, Christopher Ewasiuk +1
Ultralight bosons can form macroscopic gravitational-atom clouds around rotating black holes via superradiance, sourcing quasi-monochromatic gravitational waves through level trans…
Quantum Tunneling of Primordial Black Holes to White Holes: Rates, Constraints, and Implications for Fast Radio Bursts
Christopher Ewasiuk, Stefano Profumo
We calculate the present-day and cosmological volumetric rate of primordial black hole (PBH) quantum tunneling events to white holes, incorporating the competition between Hawking…
Precision gravity constraints on large dark sectors
Christopher Ewasiuk, Stefano Profumo
General relativity, treated as a low energy effective field theory, predicts quantum corrections to Newtons law of gravitation arising from loops of matter and graviton fields. Whi…
Dark-sector modifications to Kerr and Reissner-Nordstrom black hole evaporation
Christopher Ewasiuk, Stefano Profumo
We present a comprehensive comparative analysis of the evaporation dynamics of Schwarzschild, Kerr, and Reissner- Nordstrom black holes, focusing on the evolution of their mass, ch…
The Maximal Gravitational Wave Signal from Asteroid-Mass Primordial Black Hole Mergers At Resonant Microwave Cavities
Stefano Profumo, Lucas Brown, Christopher Ewasiuk +2
Primordial black holes can be the entirety of the dark matter in a broad, approximately five-orders-of-magnitude-wide mass range, the ``asteroid mass range'', between $10^{-16}\ M_…
Constraints on the maximal number of dark degrees of freedom from black hole evaporation, cosmic rays, colliders, and supernovae
Christopher Ewasiuk, Stefano Profumo
A dark sector with a very large number of massive degrees of freedom is generically constrained by radiative corrections to Newton's constant. However, there are caveats to this st…