103 citations · 561 across the 33 of their papers we have counts for
33 papers
Timelike Entanglement from Spacetime Density Matrices: A Lattice Realization
Hao-yu Wang, Wu-zhong Guo
We investigate timelike entanglement in quantum field theory using spacetime density matrices and provide a microscopic lattice realization. For a two-dimensional free real scalar…
Quantum information loss
James Fullwood, Wu-zhong Guo, Boyu Yang
We introduce a measure of information loss for any quantum process that may be modeled by a prepare-evolve-measure scenario: Alice prepares an ensemble of states that gets sent via…
Selecting Complex Extremal Surfaces with the Kontsevich--Segal--Witten Criterion
Wu-zhong Guo
Complex extremal surfaces naturally arise in holographic observables associated with timelike subregions in AdS/CFT and with holographic observables in dS/CFT, but their integratio…
Non-Hermitian spacetime and generalized thermofield double formalism
Wu-zhong Guo, Tao Liu
In this paper, we explore the non-Hermitian transition matrix and its gravity dual. States in quantum field theories or gravity theories are typically prepared using Euclidean path…
Pseudoentropy sum rule by analytical continuation of the superposition parameter
Wu-zhong Guo, Yao-zong Jiang, Jin Xu
In this paper, we establish a sum rule that connects the pseudoentropy and entanglement entropy of a superposition state. Through analytical continuation of the superposition param…
Relation between time- and spacelike entanglement entropy
Wu-zhong Guo, Song He, Yu-Xuan Zhang
In this study, we establish a connection between timelike and spacelike entanglement entropy. We show that timelike entanglement entropy is closely related to spacelike entanglemen…
Parameter dependence of entanglement spectra in quantum field theories
Wu-zhong Guo, Jin Xu
In this paper, we explore the characteristics of reduced density matrix spectra in quantum field theories. Previous studies mainly focus on the function $\mathcal{P}(λ):=\sum_i δ(λ…
Pseudo entropy and pseudo-Hermiticity in quantum field theories
Wu-zhong Guo, Yaozong Jiang
In this paper, we explore the concept of pseudo Rényi entropy within the context of quantum field theories (QFTs). The transition matrix is constructed by applying operators situat…
Sum rule for the pseudo-Rényi entropy
Wu-zhong Guo, Jiaju Zhang
By generalizing the density matrix to a transition matrix between two states, represented as and , one can define the pseudoentropy analogous to the entangle…
Constructible reality condition of pseudo entropy via pseudo-Hermiticity
Wu-zhong Guo, Song He, Yu-Xuan Zhang
As a generalization of entanglement entropy, pseudo entropy is not always real. The real-valued pseudo entropy has promising applications in holography and quantum phase transition…
On the real-time evolution of pseudo-entropy in 2d CFTs
Wu-zhong Guo, Song He, Yu-Xuan Zhang
In this work, we study the real-time evolution of pseudo-(Rényi) entropy, a generalization of entanglement entropy, in two-dimensional conformal field theories (CFTs). We focus on…
Position and momentum operators for a moving particle in bulk
Wu-zhong Guo
In this paper we explore how to describe a bulk moving particle in the dual conformal field theories (CFTs). One aspect of this problem is to construct the dual state of the moving…
The area operator and fixed area states in conformal field theories
Wu-zhong Guo
The fixed area states are constructed by gravitational path integrals in previous studies.In this paper we show the dual of the fixed area states in conformal field theories (CFTs)…
Entanglement spectrum of geometric states
Wu-zhong Guo
The reduced density matrix of a given subsystem, denoted by , contains the information on subregion duality in a holographic theory. We may extract the information by using th…
Correlations in geometric states
Wu-zhong Guo
In this paper we explore the correlations in the geometric states. Here the geometric state means the state in CFTs that can be effectively described by classical geometry in the b…
Entanglement of Purification and Projective Measurement in CFT
Wu-zhong Guo
We investigate entanglement of purification in conformal field theory. By using Reeh-Schlieder theorem, we construct a set of the purification states for , where i…
Rényi entropy at large energy density in 2D CFT
Wu-zhong Guo, Feng-Li Lin, Jiaju Zhang
We investigate the Rényi entropy and entanglement entropy of an interval with an arbitrary length in the canonical ensemble, microcanonical ensemble and primary excited states at l…
Note on ETH of descendant states in 2D CFT
Wu-zhong Guo, Feng-Li Lin, Jiaju Zhang
We investigate the eigenstate thermalization hypothesis (ETH) of highly excited descendant states in two-dimensional large central charge conformal field theory. We use operato…
Distinguishing Black Hole Microstates using Holevo Information
Wu-zhong Guo, Feng-Li Lin, Jiaju Zhang
We use the Holevo information in a two-dimensional conformal field theory (CFT) with a large central charge to distinguish microstates from the underlying thermal state. Hologr…
Non-geometric States in a Holographic Conformal Field Theory
Wu-zhong Guo, Feng-Li Lin, Jiaju Zhang
In the AdS/CFT correspondence, we find some conformal field theory (CFT) states that have no bulk description by the Bañados geometry. We elaborate the constraints for a CF…
Entanglement entropy in (1+1)D CFTs with multiple local excitations
Wu-zhong Guo, Song He, Zhu-Xi Luo
In this paper, we use the replica approach to study the Rényi entropy of generic locally excited states in (1+1)D CFTs, which are constructed from the insertion of multiple p…
Quantum measurement in two-dimensional conformal field theories: Application to quantum energy teleportation
Wu-Zhong Guo, Feng-Li Lin
We construct a set of quasi-local measurement operators in 2D CFT, and then use them to proceed the quantum energy teleportation (QET) protocol and show it is viable. These measure…
Entanglement Properties of Boundary State and Thermalization
Wu-zhong Guo
We discuss the regularized boundary state on two aspects in both 2D CFT and higher dimensional free field theory. One is its entanglement and correlation pr…
On New Proposal for Holographic BCFT
Chong-Sun Chu, Rong-Xin Miao, Wu-Zhong Guo
This paper is an extended version of our short letter on a new proposal for holographic boundary conformal field, i.e., BCFT. By using the Penrose-Brown-Henneaux (PBH) transformati…