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20242026
most citedConstraints on the maximal number of dark degrees of freedom from black hole evaporation, cosmic rays, colliders, and supernovae

6 citations · 7 across the 7 of their papers we have counts for

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quant-ph2026

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…

gr-qc2026

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…

gr-qc2026

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…