Lars Aalsma
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Modular fluctuations in cosmology Open
Verlinde and Zurek (VZ) have proposed that quantum gravity fluctuations in causal diamonds lead to observable effects. In particular, they argued that in quantum gravity causal diamonds have an uncertainty in their size that scales as δL∼ℓ…
Quantum extremal modular curvature: modular transport with islands Open
A bstract Modular Berry transport is a useful way to understand how geometric bulk information is encoded in the boundary CFT: the modular curvature is directly related to the bulk Riemann curvature. We extend this approach by studying mod…
Extremal black hole decay in de Sitter space Open
A bstract 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 (extremal) charged Nariai black holes to decay without…
Quantum Extremal Modular Curvature: Modular Transport with Islands Open
Modular Berry transport is a useful way to understand how geometric bulk information is encoded in the boundary CFT: The modular curvature is directly related to the bulk Riemann curvature. We extend this approach by studying modular trans…
Extremal Black Hole Decay in de Sitter Space Open
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 (extremal) charged Nariai black holes to decay without forming a…
Late-time correlators and complex geodesics in de Sitter space Open
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 derive a geodesic approximation to the two-point correlato…
Chaos and complementarity in de Sitter space Open
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 geometry that leads to a time advance in the trajectory of g…
Weak Gravity Conjecture, Black Hole Entropy, and Modular Invariance Open
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 corrections can be shown to shift the charge-to-mass ratios …
The price of curiosity: information recovery in de Sitter space Open
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 use these results to assess if an observer in de Sitter space…
Report on scipost_202212_00065v1 Open
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 derive a geodesic approximation to the two-point correlator…
Report on scipost_202212_00065v1 Open
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 derive a geodesic approximation to the two-point correlator…
An outsider’s perspective on information recovery in de Sitter space Open
A bstract 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 clear. In this paper, we continue our investigatio…
Late-Time Correlators and Complex Geodesics in de Sitter Space Open
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 derive a geodesic approximation to the two-point correlato…
From rotating to charged black holes and back again Open
A bstract 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 via emission of a smaller extremal black hole. In…
An Outsider's Perspective on Information Recovery in de Sitter Space Open
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 clear. In this paper, we continue our investigation of infor…
From Rotating to Charged Black Holes and Back Again Open
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 via emission of a smaller extremal black hole. In this pape…
Corrections to extremal black holes from Iyer-Wald formalism Open
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. In this method, corrections to the extremality bound are g…
Corrections to Extremal Black Holes from Iyer-Wald Open
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. In this method, corrections to the extremality bound are g…
Instabilities of string vacua and cosmological spacetimes Open
Recent studies of gravitational low-energy effective theories have revealed that high-energy quantum gravity effects do not always decouple at low energies. This suggests that quantum gravity might have universal low-energy predictions. In…
Supersymmetric embedding of antibrane polarization Open
We study the supersymmetry breaking induced by probe anti-D3-branes at the tip of the Klebanov-Strassler throat geometry. Antibranes inside this geometry polarize and can be described by an NS5-brane wrapping an $S^2$. When the number of a…