4 papers
Gravitational Wave Energy Emitted in the Head-On Collision of Two Black Holes
Nesibe Derin Sivrioglu, Robert R. Caldwell
What is the spectrum of gravitational radiation produced by the head-on collision of two equal-mass black holes? The emission is dominated by low frequency bremsstrahlung, producin…
Null Impact of the Null Energy Condition in Current Cosmology
Robert R. Caldwell, Eric V. Linder
We clarify the role of the oft-misunderstood Null Energy Condition (NEC) in the context of the current cosmological data. In particular, the NEC implies the sum of the total energy…
The Persistence of Nonlinear Gravitational Wave Memory
Robert R. Caldwell
Nonlinear gravitational wave memory is a surprise of theoretical physics. Whereas it is understood that a gravitational wave induces oscillatory squeezing and stretching motion in…
Cold Dark Matter Based on an Analogy with Superconductivity
Guanming Liang, Robert R. Caldwell
We present a novel candidate for cold dark matter consisting of condensed Cooper pairs in a theory of interacting fermions with broken chiral symmetry. Establishing the thermal his…