158 citations · 529 across the 21 of their papers we have counts for
16 papers · 1 filter
Holographic algebras at null infinity
Chang-Han Chen, Geoff Penington, Gautam Satishchandran +1
We construct an algebra of observables associated to a cut of null infinity in asymptotically flat spacetimes. The Bondi mass associated with a sharp cut of future null infinity is…
Uniqueness of null-local modular flow
Gautam Satishchandran, Jonathan Sorce
In arXiv:2306.01837, it was conjectured that one can engineer a large class of quantum field theory states for which the modular flow on a spacelike slice is "instantaneously local…
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…
Horizons and Soft Quantum Information
Daine L. Danielson, Gautam Satishchandran
It was recently shown that black holes decohere any quantum superpositions in their vicinity. This decoherence is mediated by soft radiation through the horizon, and can be underst…
Black Holes, Entanglement and Decoherence
Gautam Satishchandran
It was recently shown that a black hole (or any Killing horizon) will decohere any quantum superposition in their vicinity. I review three distinct but equivalent arguments that il…
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…
Local Description of Decoherence of Quantum Superpositions by Black Holes and Other Bodies
Daine L. Danielson, Gautam Satishchandran, Robert M. Wald
It was previously shown that if an experimenter, Alice, puts a massive or charged body in a quantum spatial superposition, then the presence of a black hole (or more generally any…
Infrared finite scattering theory: Amplitudes and soft theorems
Kartik Prabhu, Gautam Satishchandran
Any non-trivial scattering with massless fields in four spacetime dimensions will generically produce an out-state with memory. Scattering with any massless fields violates the sta…
Infrared finite scattering theory: Scattering states and representations of the BMS group
Kartik Prabhu, Gautam Satishchandran
Any non-trivial scattering with any massless fields in four spacetime dimensions will generically produce an "out" state with memory which gives rise to infrared divergences in the…
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…
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…
Killing Horizons Decohere Quantum Superpositions
Daine L. Danielson, Gautam Satishchandran, Robert M. Wald
We recently showed that if a massive (or charged) body is put in a quantum spatial superposition, the mere presence of a black hole in its vicinity will eventually decohere the sup…
Black Holes Decohere Quantum Superpositions
Daine L. Danielson, Gautam Satishchandran, Robert M. Wald
We show that if a massive body is put in a quantum superposition of spatially separated states, the mere presence of a black hole in the vicinity of the body will eventually destro…
Infrared Finite Scattering Theory in Quantum Field Theory and Quantum Gravity
Kartik Prabhu, Gautam Satishchandran, Robert M. Wald
Infrared (IR) divergences arise in scattering theory with massless fields and are manifestations of the memory effect. There is nothing singular about states with memory, but they…
Cosmography of KNdS Black Holes and Isentropic Phase Transitions
James McInerney, Gautam Satishchandran, Jennie Traschen
We present a new analysis of Kerr-Newman-deSitter black holes in terms of thermodynamic quantities that are defined in the observable portion of the universe; between the black hol…