21 citations · 38 across the 9 of their papers we have counts for
9 papers
Closest Safe Approach to an Accreting Black Hole
Benjamin K. Tippett, Ivan Booth
We examine the causal and geometric horizons of dynamical black holes in Lemaitre-Tolman-Bondi collapsing dust spacetimes. Marginally trapped tubes in these spacetimes may be space…
Traversable Achronal Retrograde Domains In Spacetime
Benjamin K. Tippett, David Tsang
There are many spacetime geometries in general relativity which contain closed timelike curves. A layperson might say that retrograde time travel is possible in such spacetimes. To…
The Blue Box White Paper
Benjamin K Tippett, David Tsang
This white paper is an explanation of Ben and Dave's TARDIS time machine, written for laypeople who are interested in time travel, but have no technical knowledge of Einstein's The…
Possible Bubbles of Spacetime Curvature in the South Pacific
Benjamin K. Tippett
In 1928, the late Francis Wayland Thurston published a scandalous manuscript in purport of warning the world of a global conspiracy of occultists. Among the documents he gathered t…
Gravitational Lensing as a Mechanism For Effective Cloaking
Benjamin K. Tippett
In light of the surge in popularity of electromagnetic cloaking devices, we consider whether it is possible to use gravitational lensing to cloak a volume of spacetime. A metric fo…
Gravitational collapse of quantum matter
Benjamin K. Tippett, Viqar Husain
We describe a class of exactly soluble models for gravitational collapse in spherical symmetry obtained by patching dynamical spherically symmetric exterior spacetimes with cosmolo…