650 citations · 1.8k across the 29 of their papers we have counts for
30 papers
Constitutional Classifiers: Defending against Universal Jailbreaks across Thousands of Hours of Red Teaming
Mrinank Sharma, Meg Tong, Jesse Mu +40
Large language models (LLMs) are vulnerable to universal jailbreaks-prompting strategies that systematically bypass model safeguards and enable users to carry out harmful processes…
Semi-classical dilaton gravity and the very blunt defect expansion
Jorrit Kruthoff, Adam Levine
We explore dilaton gravity with general dilaton potentials in the semi-classical limit viewed both as a gas of blunt defects and also as a semi-classical theory in its own right. W…
Carrying over algorithm in transformers
Jorrit Kruthoff
Addition is perhaps one of the simplest arithmetic tasks one can think of and is usually performed using the carrying over algorithm. This algorithm consists of two tasks: adding d…
The power of Lorentzian wormholes
Andreas Blommaert, Jorrit Kruthoff, Shunyu Yao
As shown by Louko and Sorkin in 1995, topology change in Lorentzian signature involves spacetimes with singular points, which they called crotches. We modify their construction to…
S-duality in -deformed CFT
Nathan Benjamin, Scott Collier, Jorrit Kruthoff +2
deformed conformal field theories can be reformulated as worldsheet theories of non-critical strings. We use this correspondence to compute and study the defo…
An integrable road to a perturbative plateau
Andreas Blommaert, Jorrit Kruthoff, Shunyu Yao
As has been known since the 90s, there is an integrable structure underlying two-dimensional gravity theories. Recently, two-dimensional gravity theories have regained an enormous…
Higher spin JT gravity and a matrix model dual
Jorrit Kruthoff
We propose a generalization of the Saad-Shenker-Stanford duality relating matrix models and JT gravity to the case in which the bulk includes higher spin fields. Using a $\textsf{P…
Alpha states demystified: Towards microscopic models of AdS holography
Andreas Blommaert, Luca V. Iliesiu, Jorrit Kruthoff
We continue our study of factorizing theories of dilaton gravity, characterized by a universal bilocal interaction. All such factorizing theories can be shown to have discrete spec…
Gravity factorized
Andreas Blommaert, Luca V. Iliesiu, Jorrit Kruthoff
We find models of two-dimensional gravity that resolve the factorization puzzle and have a discrete spectrum, whilst retaining a semiclassical description. A novelty of these model…
Gravity without averaging
Andreas Blommaert, Jorrit Kruthoff
We present a gravitational theory that interpolates between JT gravity, and a gravity theory with a fixed boundary Hamiltonian. For this, we consider a matrix integral with the ins…
Free fermion entanglement with a semitransparent interface: the effect of graybody factors on entanglement islands
Jorrit Kruthoff, Raghu Mahajan, Chitraang Murdia
We study the entanglement entropy of free fermions in 2d in the presence of a partially transmitting interface that splits Minkowski space into two half-spaces. We focus on the cas…
Building Tensor Networks for Holographic States
Pawel Caputa, Jorrit Kruthoff, Onkar Parrikar
We discuss a one-parameter family of states in two-dimensional holographic conformal field theories which are constructed via the Euclidean path integral of an effective theory on…
Classifying boundary conditions in JT gravity: from energy-branes to -branes
Akash Goel, Luca V. Iliesiu, Jorrit Kruthoff +1
We classify the possible boundary conditions in JT gravity and discuss their exact quantization. Each boundary condition that we study will reveal new features in JT gravity relate…
Diving into a holographic superconductor
Sean A. Hartnoll, Gary T. Horowitz, Jorrit Kruthoff +1
Charged black holes in anti-de Sitter space become unstable to forming charged scalar hair at low temperatures . This phenomenon is a holographic realization of sup…
Gravitational duals to the grand canonical ensemble abhor Cauchy horizons
Sean A. Hartnoll, Gary T. Horowitz, Jorrit Kruthoff +1
The gravitational dual to the grand canonical ensemble of a large holographic theory is a charged black hole. These spacetimes -- for example Reissner-Nordström-AdS -- can have…
Density matrices in quantum gravity
Tarek Anous, Jorrit Kruthoff, Raghu Mahajan
We study density matrices in quantum gravity, focusing on topology change. We argue that the inclusion of bra-ket wormholes in the gravity path integral is not a free choice, but i…
On the flow of states under
Jorrit Kruthoff, Onkar Parrikar
We study the deformation of two dimensional quantum field theories from a Hamiltonian point of view, focusing on aspects of the theory in Lorentzian signature. Our…
JT gravity at finite cutoff
Luca V. Iliesiu, Jorrit Kruthoff, Gustavo J. Turiaci +1
We compute the partition function of Jackiw-Teitelboim (JT) gravity at finite cutoff in two ways: (i) via an exact evaluation of the Wheeler-DeWitt wave-functional in radial q…
Holographic flows from CFT to the Kasner universe
Alexander Frenkel, Sean A. Hartnoll, Jorrit Kruthoff +1
The Schwarzschild singularity is known to be classically unstable. We demonstrate a simple holographic consequence of this fact, focusing on a perturbation that is uniform in bound…
Bootstrapping Matrix Quantum Mechanics
Xizhi Han, Sean A. Hartnoll, Jorrit Kruthoff
Large matrix quantum mechanics is central to holographic duality but not solvable in the most interesting cases. We show that the spectrum and simple expectation values in thes…
Hamiltonian deformations in quantum mechanics, , and SYK
David J. Gross, Jorrit Kruthoff, Andrew Rolph +1
Motivated by , we introduce and study a wide class of solvable deformations of quantum-mechanical theories. These deformations map the Hamiltonian to a function of itself.…
Bulk entanglement entropy for photons and gravitons in AdS
Alexandre Belin, Nabil Iqbal, Jorrit Kruthoff
We study quantum corrections to holographic entanglement entropy in AdS/CFT; these are given by the bulk entanglement entropy across the Ryu-Takayanagi surface for all fiel…
deformed CFT as a non-critical string
Nele Callebaut, Jorrit Kruthoff, Herman Verlinde
We present a new exact treatment of deformed 2D CFT in terms of the worldsheet theory of a non-critical string. The transverse dimensions of the non-critical string are…
in AdS and Quantum Mechanics
David J. Gross, Jorrit Kruthoff, Andrew Rolph +1
Quantum field theory in zero spatial dimensions has a rich infrared landscape and a universal ultraviolet, inverting the usual Wilsonian paradigm. For holographic theories this imp…