438 citations · 5.3k across the 180 of their papers we have counts for
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Repeated Gravitational Wave Bursts from Cosmic Strings
Pierre Auclair, Danièle A. Steer, Tanmay Vachaspati
A characteristic observational signature of cosmic strings are short duration gravitational wave (GW) bursts. These have been searched for by the LIGO-Virgo-KAGRA (LVK) collaborati…
Gravitational Waves, Gamma Ray Bursts, and Black Stars
Tanmay Vachaspati
Stars that are collapsing toward forming a black hole but appear frozen near their Schwarzschild horizon are termed "black stars". The collision of two black stars leads to gravita…
Island Cosmology
Sourish Dutta, Tanmay Vachaspati
If the observed dark energy is a cosmological constant, the canonical state of the universe is de Sitter spacetime. In such a spacetime, quantum fluctuations that violate the null…
On Constructing Baby Universes and Black Holes
Tanmay Vachaspati
The creation of spacetimes with horizons is discussed, focussing on baby universes and black holes as examples. There is a complex interplay of quantum theory and General Relativit…
Quantum Radiation from Quantum Gravitational Collapse
Tanmay Vachaspati, Dejan Stojkovic
We study quantum radiation emitted during the collapse of a quantized, gravitating, spherical domain wall. The amount of radiation emitted during collapse now depends on the wavefu…
Observation of Incipient Black Holes and the Information Loss Problem
Tanmay Vachaspati, Dejan Stojkovic, Lawrence M. Krauss
We study the formation of black holes by spherical domain wall collapse as seen by an asymptotic observer, using the functional Schrodinger formalism. To explore what signals such…
Propagating phase boundaries as sonic horizons
Tanmay Vachaspati
If certain conditions are met, a propagating phase boundary can be a sonic horizon. Sonic Hawking radiation from such a phase boundary is expected in the quantum theory. The Hawkin…
What is the Homogeneity of our Universe Telling Us?
Mark Trodden, Tanmay Vachaspati
The universe we observe is homogeneous on super-horizon scales, leading to the ``cosmic homogeneity problem''. Inflation alleviates this problem but cannot solve it within the real…
Causality and Cosmic Inflation
Tanmay Vachaspati, Mark Trodden
In the context of inflationary models with a pre-inflationary stage, in which the Einstein equations are obeyed, the weak energy condition is satisfied, and spacetime topology is t…
Creation and Structure of Baby Universes in Monopole Collisions
Arvind Borde, Mark Trodden, Tanmay Vachaspati
Under certain circumstances, the collision of magnetic monopoles, topologically locked-in regions of false vacuum, leads to topological inflation and the creation of baby universes…
Topological Inflation with Multiple Winding
Andrew A. de Laix, Mark Trodden, Tanmay Vachaspati
We analyze the core dynamics of critically coupled, superheavy gauge vortices in the (2+1) dimensional Einstein-Abelian-Higgs system. By numerically solving the Eistein and field e…