970 citations · 2.7k across the 16 of their papers we have counts for
17 papers
Studying Large Language Model Generalization with Influence Functions
Roger Grosse, Juhan Bae, Cem Anil +14
When trying to gain better visibility into a machine learning model in order to understand and mitigate the associated risks, a potentially valuable source of evidence is: which tr…
Bra-ket wormholes and Casimir entropy
Alexey Milekhin, Amirhossein Tajdini
Bra-ket wormholes are non-trivial saddles in Euclidean gravity. They have to be sustained by negative Casimir energy of matter fields inside the throat. However, Casimir energy is…
Focusing bounds for CFT correlators and the S-matrix
Thomas Hartman, Yikun Jiang, Francesco Sgarlata +1
The focusing theorem in General Relativity underlies causality, singularity theorems, entropy inequalities, and more. In AdS/CFT, we show that focusing in the bulk leads to a bound…
The Spacetime Geometry of Fixed-Area States in Gravitational Systems
Xi Dong, Donald Marolf, Pratik Rath +2
The concept of fixed-area states has proven useful for recent studies of quantum gravity, especially in connection with gravitational holography. We explore the Lorentz-signature s…
Charge fluctuation entropy of Hawking radiation: a replica-free way to find large entropy
Alexey Milekhin, Amirhossein Tajdini
We study the fluctuation entropy for two-dimensional matter systems with an internal symmetry coupled to Jackiw--Teitelboim(JT) gravity joined to a Minkowski region. The fluctuatio…
Replica wormholes for an evaporating 2D black hole
Kanato Goto, Thomas Hartman, Amirhossein Tajdini
Quantum extremal islands reproduce the unitary Page curve of an evaporating black hole. This has been derived by including replica wormholes in the gravitational path integral, but…
The entropy of Hawking radiation
Ahmed Almheiri, Thomas Hartman, Juan Maldacena +2
In this review, we describe recent progress on the black hole information problem that involves a new understanding of how to calculate the entropy of Hawking radiation. We show ho…
Free partition functions and an averaged holographic duality
Nima Afkhami-Jeddi, Henry Cohn, Thomas Hartman +1
We study the torus partition functions of free bosonic CFTs in two dimensions. Integrating over Narain moduli defines an ensemble-averaged free CFT. We calculate the averaged parti…
High-dimensional sphere packing and the modular bootstrap
Nima Afkhami-Jeddi, Henry Cohn, Thomas Hartman +2
We carry out a numerical study of the spinless modular bootstrap for conformal field theories with current algebra , or equivalently the linear programming bo…
Replica Wormholes and the Entropy of Hawking Radiation
Ahmed Almheiri, Thomas Hartman, Juan Maldacena +2
The information paradox can be realized in anti-de Sitter spacetime joined to a Minkowski region. In this setting, we show that the large discrepancy between the von Neumann entrop…
Fast Conformal Bootstrap and Constraints on 3d Gravity
Nima Afkhami-Jeddi, Thomas Hartman, Amirhossein Tajdini
The crossing equations of a conformal field theory can be systematically truncated to a finite, closed system of polynomial equations. In certain cases, solutions of the truncated…
A Bound on Massive Higher Spin Particles
Nima Afkhami-Jeddi, Sandipan Kundu, Amirhossein Tajdini
According to common lore, massive elementary higher spin particles lead to inconsistencies when coupled to gravity. However, this scenario was not completely ruled out by previous…
Holography at finite cutoff with a deformation
Thomas Hartman, Jorrit Kruthoff, Edgar Shaghoulian +1
We generalize the deformation of CFT to higher-dimensional large- CFTs, and show that in holographic theories, the resulting effective field theory matches s…
A Conformal Collider for Holographic CFTs
Nima Afkhami-Jeddi, Sandipan Kundu, Amirhossein Tajdini
We develop a formalism to study the implications of causality on OPE coefficients in conformal field theories with large central charge and a sparse spectrum of higher spin operato…
Shockwaves from the Operator Product Expansion
Nima Afkhami-Jeddi, Thomas Hartman, Sandipan Kundu +1
We clarify and further explore the CFT dual of shockwave geometries in Anti-de Sitter. The shockwave is dual to a CFT state produced by a heavy local operator inserted at a complex…
Averaged Null Energy Condition from Causality
Thomas Hartman, Sandipan Kundu, Amirhossein Tajdini
Unitary, Lorentz-invariant quantum field theories in flat spacetime obey microcausality: commutators vanish at spacelike separation. For interacting theories in more than two dimen…
Einstein gravity 3-point functions from conformal field theory
Nima Afkhami-Jeddi, Thomas Hartman, Sandipan Kundu +1
We study stress tensor correlation functions in four-dimensional conformal field theories with large and a sparse spectrum. Theories in this class are expected to have local ho…