796 citations · 2.3k across the 17 of their papers we have counts for
19 papers
A Semiclassical Entanglement Wedge in Double-Scaled SYK
Xi Dong, Jiuci Xu
We study the entanglement structure of partially entangled thermal states in double-scaled SYK , allowing flavor degrees of freedom carried by matter insertions to be in an arbitra…
Modular flow and the area operator
Xi Dong, Donald Marolf, Pratik Rath
In the context of the AdS/CFT correspondence, the Jafferis-Lewkowycz-Maldacena-Suh (JLMS) formula relates the boundary modular Hamiltonian to the HRT area operator and the correspo…
The JLMS formula in a large code with approximate error correction
Xi Dong, Donald Marolf, Pratik Rath
Gauge/gravity duality is often described as a quantum error correcting code. However, as seen in the Jafferis-Lewkowycz-Maldacena-Suh (JLMS) formula, exact quantum error correction…
Phase transitions in 3D gravity and fractal dimension
Xi Dong, Shaun Maguire, Alexander Maloney +1
We show that for three dimensional gravity with higher genus boundary conditions, if the theory possesses a sufficiently light scalar, there is a second order phase transition wher…
Entropy, Extremality, Euclidean Variations, and the Equations of Motion
Xi Dong, Aitor Lewkowycz
We study the Euclidean gravitational path integral computing the Renyi entropy and analyze its behavior under small variations. We argue that, in Einstein gravity, the extremality…
Deriving covariant holographic entanglement
Xi Dong, Aitor Lewkowycz, Mukund Rangamani
We provide a gravitational argument in favour of the covariant holographic entanglement entropy proposal. In general time-dependent states, the proposal asserts that the entangleme…
Linearity of Holographic Entanglement Entropy
Ahmed Almheiri, Xi Dong, Brian Swingle
We consider the question of whether the leading contribution to the entanglement entropy in holographic CFTs is truly given by the expectation value of a linear operator as is sugg…
AdS/CFT and the Little Hierarchy Problem
Xi Dong, Daniel Z. Freedman, Yue Zhao
The AdS/CFT correspondence is applied to a close analogue of the little hierarchy problem in , . The new mechanism requires a Maxwell field that gauges a $U(1)…
Generalized Gravitational Entropy from Total Derivative Action
Xi Dong, Rong-Xin Miao
We investigate the generalized gravitational entropy from total derivative terms in the gravitational action. Following the method of Lewkowycz and Maldacena, we find that the gene…
Bulk Locality and Quantum Error Correction in AdS/CFT
Ahmed Almheiri, Xi Dong, Daniel Harlow
We point out a connection between the emergence of bulk locality in AdS/CFT and the theory of quantum error correction. Bulk notions such as Bogoliubov transformations, location in…
Explicitly Broken Supersymmetry with Exactly Massless Moduli
Xi Dong, Daniel Z. Freedman, Yue Zhao
There is an avatar of the little hierarchy problem of the MSSM in 3-dimensional supersymmetry. We propose a solution to this problem in AdS based on the AdS/CFT correspondence.…
Mock Modular Mathieu Moonshine Modules
Miranda C. N. Cheng, Xi Dong, John F. R. Duncan +3
We construct super vertex operator algebras which lead to modules for moonshine relations connecting the four smaller sporadic simple Mathieu groups with distinguished mock modular…
Holographic Reconstruction of General Bulk Surfaces
Bartlomiej Czech, Xi Dong, James Sully
We propose a reconstruction of general bulk surfaces in any dimension in terms of the differential entropy in the boundary field theory. In particular, we extend the proof of Headr…
Constraints on RG Flows from Holographic Entanglement Entropy
Sera Cremonini, Xi Dong
We examine the RG flow of a candidate c-function, extracted from the holographic entanglement entropy of a strip-shaped region, for theories with broken Lorentz invariance. We clar…
Holographic Entanglement Entropy for General Higher Derivative Gravity
Xi Dong
We propose a general formula for calculating the entanglement entropy in theories dual to higher derivative gravity where the Lagrangian is a contraction of Riemann tensors. Our fo…
Holographic entanglement beyond classical gravity
Taylor Barrella, Xi Dong, Sean A. Hartnoll +1
The Renyi entropies and entanglement entropy of 1+1 CFTs with gravity duals can be computed by explicit construction of the bulk spacetimes dual to branched covers of the boundary…
Mathieu Moonshine and N=2 String Compactifications
Miranda C. N. Cheng, Xi Dong, John F. R. Duncan +3
There is a `Mathieu moonshine' relating the elliptic genus of K3 to the sporadic group M_{24}. Here, we give evidence that this moonshine extends to part of the web of dualities co…
Aspects of holography for theories with hyperscaling violation
Xi Dong, Sarah Harrison, Shamit Kachru +2
We analyze various aspects of the recently proposed holographic theories with general dynamical critical exponent z and hyperscaling violation exponent . We first find the basic…
Analytic Coleman-De Luccia Geometries
Xi Dong, Daniel Harlow
We present the necessary and sufficient conditions for a Euclidean scale factor to be a solution of the Coleman-De Luccia equations for some analytic potential , with a Loren…