342 citations · 769 across the 19 of their papers we have counts for
19 papers · 1 filter
Holographic codes and bulk RG flows
Xi Dong, Donald Marolf, Pratik Rath
We consider the coarse-graining of holographic quantum error correcting codes under a generalized notion of bulk renormalization-group flow. In particular, we study the renormaliza…
Geometric Entropies and their Hamiltonian Flows
Xi Dong, Donald Marolf, Pratik Rath
In holographic theories, the Hubeny-Rangamani-Takayanagi (HRT) area operator plays a key role in our understanding of the emergence of semiclassical Einstein-Hilbert gravity. When…
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…
Null states and time evolution in a toy model of black hole dynamics
Xi Dong, Maciej Kolanowski, Xiaoyi Liu +2
Spacetime wormholes can provide non-perturbative contributions to the gravitational path integral that make the actual number of states in a gravitational system much smaller…
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…
Constrained HRT Surfaces and their Entropic Interpretation
Xi Dong, Donald Marolf, Pratik Rath
Consider two boundary subregions and that lie in a common boundary Cauchy surface, and consider also the associated HRT surface for . In that context, the constrai…
Algebras and Hilbert spaces from gravitational path integrals: Understanding Ryu-Takayanagi/HRT as entropy without AdS/CFT
Eugenia Colafranceschi, Xi Dong, Donald Marolf +1
Recent works by Chandrasekaran, Penington, and Witten have shown in various special contexts that the quantum-corrected Ryu-Takayanagi (RT) entropy (or its covariant Hubeny-Rangama…
Holographic Tensor Networks with Bulk Gauge Symmetries
Xi Dong, Sean McBride, Wayne W. Weng
Tensor networks are useful toy models for understanding the structure of entanglement in holographic states and reconstruction of bulk operators within the entanglement wedge. They…
Holographic entanglement from the UV to the IR
Xi Dong, Grant N. Remmen, Diandian Wang +2
In AdS/CFT, observables on the boundary are invariant under renormalization group (RG) flow in the bulk. In this paper, we study holographic entanglement entropy under bulk RG flow…
A Tale of Two Butterflies: An Exact Equivalence in Higher-Derivative Gravity
Xi Dong, Diandian Wang, Wayne W. Weng +1
We prove the equivalence of two holographic computations of the butterfly velocity in higher-derivative theories with Lagrangian built from arbitrary contractions of curvature tens…
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…
Replica Wormholes and Holographic Entanglement Negativity
Xi Dong, Sean McBride, Wayne W. Weng
Recent work has shown how to understand the Page curve of an evaporating black hole from replica wormholes. However, more detailed information about the structure of its quantum st…
Real-time gravitational replicas: Low dimensional examples
Sean Colin-Ellerin, Xi Dong, Donald Marolf +2
We continue the study of real-time replica wormholes initiated in arXiv:2012.00828. Previously, we had discussed the general principles and had outlined a variational principle for…
Real-time gravitational replicas: Formalism and a variational principle
Sean Colin-Ellerin, Xi Dong, Donald Marolf +2
This work is the first step in a two-part investigation of real-time replica wormholes. Here we study the associated real-time gravitational path integral and construct the variati…
An Alternative Method for Extracting the von Neumann Entropy from Renyi Entropies
Eric D'Hoker, Xi Dong, Chih-Hung Wu
An alternative method is presented for extracting the von Neumann entropy from for integer in a quantum system with dens…
One-loop universality of holographic codes
Xi Dong, Donald Marolf
Recent work showed holographic error correcting codes to have simple universal features at . In particular, states of fixed Ryu-Takayanagi (RT) area in such codes are assoc…
Flat entanglement spectra in fixed-area states of quantum gravity
Xi Dong, Daniel Harlow, Donald Marolf
We use the Einstein-Hilbert gravitational path integral to investigate gravitational entanglement at leading order . We argue that semiclassical states prepared by a Euclid…
Modular Flow as a Disentangler
Yiming Chen, Xi Dong, Aitor Lewkowycz +1
In holographic duality, the entanglement entropy of a boundary region is proposed to be dual to the area of an extremal codimension-2 surface that is homologous to the boundary reg…
The Gravity Dual of Renyi Entropy
Xi Dong
A remarkable yet mysterious property of black holes is that their entropy is proportional to the horizon area. This area law inspired the holographic principle, which was later rea…