189 citations · 1.1k across the 42 of their papers we have counts for
33 papers · 1 filter
Proof of the entropic -theorem
Jonah Kudler-Flam
We prove an entropic -theorem in two dimensions by constructing a -function from the mutual information between spacelike separated wedges, defined through the relative entro…
The cosmological necklace problem
Andreas Blommaert, Jonah Kudler-Flam, Vladimir Narovlansky +1
We investigate 3d de Sitter axion wormhole which contribute to the no-boundary density matrix. We identify "cosmological necklace" solutions: an infinite series of Euclidean saddle…
Wormholes and Averaging over N
Jonah Kudler-Flam, Edward Witten
The gravitational path integral produces an asymptotic expansion in , a fact which is puzzling in the case of observables that are expected to fluctuate wildly. Wormholes appe…
Generalized Entropy is von Neumann Entropy II: The complete symmetry group and edge modes
Marc S. Klinger, Jonah Kudler-Flam, Gautam Satishchandran
We consider the algebra of observables of perturbative quantum gravity in the exterior of a stationary black hole or the static patch of de Sitter spacetime. It was previously argu…
Emergent Mixed States for Baby Universes and Black Holes
Jonah Kudler-Flam, Edward Witten
We examine the behavior of sequences of states in the large limit of AdS/CFT duality in cases in which the bulk duals involve baby universes or black holes. Such sequences gene…
Stringy algebras, stretched horizons, and quantum-connected wormholes
Aidan Herderschee, Jonah Kudler-Flam
While the supergravity limit of AdS/CFT has been extensively explored, the regime in which stringy dynamics dominate, characterized by the emergence of an infinite tower of higher-…
It costs nothing to teleport information into a black hole
Jonah Kudler-Flam, Geoff Penington
It is often claimed that adding a qubit to a black hole requires energy so that the extra Bekenstein-Hawking entropy can accommodate the qubit. In this essay,…
Absolute entropy and the observer's no-boundary state
Andreas Blommaert, Jonah Kudler-Flam, Erez Y. Urbach
We investigate the no-boundary proposal for closed universes with an observer. We argue that the observer's no-boundary state is the identity operator on the physical Hilbert space…
Vacua and infrared radiation in de Sitter quantum field theory
Jonah Kudler-Flam, Kartik Prabhu, Gautam Satishchandran
We analyze the asymptotic behavior of quantum fields and perturbative quantum gravity in de Sitter space. We show that the necessary and sufficient condition for the existence of a…
How to Minimize the Decoherence Caused by Black Holes
Daine L. Danielson, Jonah Kudler-Flam, Gautam Satishchandran +1
We consider an experimentalist, Alice, who creates a quantum superposition of a charged or massive body outside of a black hole (or, more generally, in the presence of a Killing ho…
Entanglement Negativity and Replica Symmetry Breaking in General Holographic States
Xi Dong, Jonah Kudler-Flam, Pratik Rath
The entanglement negativity is a useful measure of quantum entanglement in bipartite mixed states. In random tensor networks (RTNs), which are related to fixed-a…
A covariant regulator for entanglement entropy: proofs of the Bekenstein bound and QNEC
Jonah Kudler-Flam, Samuel Leutheusser, Adel A. Rahman +2
While von Neumann entropies for subregions in quantum field theory universally contain ultraviolet divergences, differences between von Neumann entropies are finite and well-define…
A Modified Cosmic Brane Proposal for Holographic Renyi Entropy
Xi Dong, Jonah Kudler-Flam, Pratik Rath
We propose a new formula for computing holographic Renyi entropies in the presence of multiple extremal surfaces. Our proposal is based on computing the wave function in the basis…
Bridging two quantum quench problems -- local joining quantum quench and Möbius quench -- and their holographic dual descriptions
Jonah Kudler-Flam, Masahiro Nozaki, Tokiro Numasawa +2
We establish an equivalence between two different quantum quench problems, the joining local quantum quench and the Möbius quench, in the context of -dimensional conformal f…
Generalized Black Hole Entropy is von Neumann Entropy
Jonah Kudler-Flam, Samuel Leutheusser, Gautam Satishchandran
It was recently shown that the von Neumann algebras of observables dressed to the mass of a Schwarzschild-AdS black hole or an observer in de Sitter are Type II, and thus admit wel…
Rényi mutual information in quantum field theory, tensor networks, and gravity
Jonah Kudler-Flam, Laimei Nie, Akash Vijay
We explore a large class of correlation measures called the Rényi mutual informations (RMIs). Unlike the commonly used notion of RMI involving linear combinations of Rényi en…
On Quantum Information Before the Page Time
Jonah Kudler-Flam, Yuya Kusuki
While recent progress in the black hole information problem has shown that the entropy of Hawking radiation follows a unitary Page curve, the quantum state of Hawking radiation pri…
Rényi Mutual Information in Quantum Field Theory
Jonah Kudler-Flam
We study a proper definition of Rényi mutual information (RMI) in quantum field theory as defined via the Petz Rényi relative entropy. Unlike the standard definition, the RMI we co…
Large and Small Corrections to the JLMS Formula from Replica Wormholes
Jonah Kudler-Flam, Pratik Rath
The JLMS formula relates the bulk and boundary relative entropies and is fundamental to the holographic dictionary, providing justification for entanglement wedge reconstruction. W…
Mixed-state entanglement and information recovery in thermalized states and evaporating black holes
Shreya Vardhan, Jonah Kudler-Flam, Hassan Shapourian +1
We study the universal behavior of quantum information-theoretic quantities in thermalized isolated quantum many-body systems and evaporating black holes. In particular, we study a…
Bound entanglement in thermalized states and black hole radiation
Shreya Vardhan, Jonah Kudler-Flam, Hassan Shapourian +1
We study the mixed-state entanglement structure of chaotic quantum many-body systems at late times using the recently developed . A rich entangl…
Negativity Spectra in Random Tensor Networks and Holography
Jonah Kudler-Flam, Vladimir Narovlansky, Shinsei Ryu
Negativity is a measure of entanglement that can be used both in pure and mixed states. The negativity spectrum is the spectrum of eigenvalues of the partially transposed density m…
Distinguishing Random and Black Hole Microstates
Jonah Kudler-Flam, Vladimir Narovlansky, Shinsei Ryu
This is an expanded version of the short report [Phys. Rev. Lett. 126, 171603 (2021)], where the relative entropy was used to distinguish random states drawn from the Wishart ensem…
Relative Entropy of Random States and Black Holes
Jonah Kudler-Flam
We study the relative entropy of highly excited quantum states. First, we sample states from the Wishart ensemble and develop a large-N diagrammatic technique for the relative entr…