75 citations · 334 across the 15 of their papers we have counts for
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Complex Geodesics in the Nariai Geometry
Lars Aalsma, Mir Mehedi Faruk
We study two-point correlation functions of heavy scalar fields in the Nariai geometry. Utilizing the heat kernel formalism, we obtain this result from a geodesic approximation to…
Limits on the Statistical Description of Charged de Sitter Black Holes
Lars Aalsma, Puxin Lin, Jan Pieter van der Schaar +2
The thermodynamics of de Sitter black holes is complicated by the presence of two horizons and the absence of a globally defined timelike Killing vector. The standard choice of the…
Extremal Black Hole Decay in de Sitter Space
Lars Aalsma, Jan Pieter van der Schaar, Manus Visser
The decay of extremal charged black holes has been a useful guidance to derive consistency conditions in quantum gravity. In de Sitter space it has been argued that requiring (extr…
Late-Time Correlators and Complex Geodesics in de Sitter Space
Lars Aalsma, Mir Mehedi Faruk, Jan Pieter van der Schaar +2
We study two-point correlation functions of a massive free scalar field in de Sitter space using the heat kernel formalism. Focusing on two operators in conjugate static patches we…
An Outsider's Perspective on Information Recovery in de Sitter Space
Lars Aalsma, Sergio E. Aguilar-Gutierrez, Watse Sybesma
Entanglement islands play a crucial role in our understanding of how Hawking radiation encodes information in a black hole, but their relevance in cosmological spacetimes is less c…
From Rotating to Charged Black Holes and Back Again
Lars Aalsma, Gary Shiu
The mild form of the Weak Gravity Conjecture (WGC) requires higher derivative corrections to extremal charged black holes to increase their charge-to-mass ratio. This allows decay…
Corrections to Extremal Black Holes from Iyer-Wald Formalism
Lars Aalsma
We present a general method of computing corrections to the extremality bound and entropy of Kerr-Newman black holes due to an arbitrary perturbation using the Iyer-Wald formalism.…
Shocks and Information Exchange in de Sitter Space
Lars Aalsma, Alex Cole, Edward Morvan +2
We discuss some implications of recent progress in understanding the black hole information paradox for complementarity in de Sitter space. Extending recent work by two of the auth…
The Price of Curiosity: Information Recovery in de Sitter Space
Lars Aalsma, Watse Sybesma
Recent works have revealed that quantum extremal islands can contribute to the fine-grained entropy of black hole radiation reproducing the unitary Page curve. In this paper, we us…
A New Spin on the Weak Gravity Conjecture
Lars Aalsma, Alex Cole, Gregory J. Loges +1
The mild form of the Weak Gravity Conjecture states that quantum or higher-derivative corrections should decrease the mass of large extremal charged black holes at fixed charge. Th…
Chaos and complementarity in de Sitter space
Lars Aalsma, Gary Shiu
We consider small perturbations to a static three-dimensional de Sitter geometry. For early enough perturbations that satisfy the null energy condition, the result is a shockwave g…
Weak Gravity Conjecture, Black Hole Entropy, and Modular Invariance
Lars Aalsma, Alex Cole, Gary Shiu
In recent literature, it has been argued that a mild form of the Weak Gravity Conjecture (WGC) is satisfied by wide classes of effective field theories in which higher-derivative c…
Back(reaction) to the Future in the Unruh-de Sitter State
Lars Aalsma, Maulik Parikh, Jan Pieter van der Schaar
Motivated by black hole physics, we define the Unruh state for a scalar field in de Sitter space. Like the Bunch-Davies state, the Unruh-de Sitter state appears thermal to a static…
Extremal Tunneling and Anti-de Sitter Instantons
Lars Aalsma, Jan Pieter van der Schaar
We rederive and extend the amplitude for charged spherical shells tunneling through the outer horizon of charged black holes. In particular, we explicitly confirm that an effective…
Constrained superfields on metastable anti-D3-branes
Lars Aalsma, Jan Pieter van der Schaar, Bert Vercnocke
We study the effect of brane polarization on the supersymmetry transformations of probe anti-D3-branes at the tip of a Klebanov-Strassler throat geometry. As is well known, the pro…