Xinan Zhou

Negative Rank Relations for Giant Graviton Correlators

Qi Chen, Zhongjie Huang, Xinan Zhou

We study correlation functions of giant and dual giant gravitons in $N = 4$ super Yang--Mills theory. Although the two objects correspond to rather different D3 brane config…

Pre-Strings Lectures on Holographic Correlators and Analytic Bootstrap

Xinan Zhou

Over the past decade, the bootstrap strategy has transformed the computation of holographic correlators and revealed structures suggesting an emerging scattering amplitude program…

Quantum Gravity Corrections to Giant Graviton Correlators

Junding Chen, Xi-Er Du, Hynek Paul +1

We compute the leading quantum gravity correction to the correlation function of two maximal giant gravitons and two light supergravitons in the stress tensor multiplet in the supe…

Cosmological Correlators Using Tensor Networks

Ujjwal Basumatary, Aninda Sinha, Xinan Zhou

We develop a nonperturbative tensor-network framework for computing cosmological correlators in de Sitter space and use it to test the proposal that suitably defined in-in correlat…

Defect Approach to Giant Graviton Dynamics

Junding Chen, Yunfeng Jiang, Xinan Zhou

We develop a framework of zero dimensional defects for analyzing light-light-heavy-heavy (LLHH) correlators in conformal field theories. We specifically apply this formalism to cor…

hep-th2025

Notes on flat-space limit of holographic defect correlators in position space

Qi Chen, Yi-Xiao Tao, Xinan Zhou

We study the large AdS radius limit of correlation functions in holographic defect CFTs. For two-point functions of operators inserted away from the defect, we derive a position sp…

hep-th2025

Giant Graviton Correlators as Defect Systems

Junding Chen, Yunfeng Jiang, Xinan Zhou

We consider correlation functions of two maximal giant gravitons and two light $\frac{1}{2}$ -BPS operators in 4d $N = 4$ SYM. Viewed as two-point correlators in the presenc…

hep-th2025★ 1 cited

Dissecting supergraviton six-point function with lightcone limits and chiral algebra

Vasco Goncalves, Maria Nocchi, Xinan Zhou

We develop a bootstrap strategy to obtain the six-point function of supergravitons in $A d S_{5} \times S^{5}$ from symmetry constraints and consistency conditions. Compared to previous b…

Meson correlators in 4d $N = 2$ SCFTs and hints for 8d structures at weak coupling

Xi-Er Du, Zhongjie Huang, Bo Wang +2

We study correlators of $\frac{1}{2}$ -BPS mesons in two examples of 4d SQCDs with $N = 2$ superconformal symmetry in the planar limit. We focus on the weakly coupled regime…

Flat-space limit of defect correlators and stringy AdS form factors

Luis F. Alday, Xinan Zhou

We study AdS form factors, given by the Mellin representation for CFT correlators of local operators in the presence of extended defects. We propose a formula for taking (and expan…

On the Regge behaviour of the AdS Virasoro-Shapiro Amplitude

Luis F. Alday, Maria Nocchi, Clément Virally +1

We compute the AdS Virasoro-Shapiro amplitude in the Regge limit, in terms of the CFT data of the exchanged operators in the leading Regge trajectory. To any order in the small cur…

Correlators of $N = 4$ SYM on real projective space at strong coupling

Xinan Zhou

We consider type IIB supergravity on a $Z_{2}$ quotient of AdS $_{5} \times$ S $^{5}$ as the holographic dual of strongly coupled 4d $N = 4$ SYM on $RP^{4}$ space wit…

Unitarity Method for Holographic Defects

Junding Chen, Aleix Gimenez-Grau, Hynek Paul +1

We initiate the study of loop-level holographic correlators in the presence of defects. We present a unitarity method which constructs loop corrections from lower order data. As an…

Defect two-point functions in 6d (2,0) theories

Junding Chen, Aleix Gimenez-Grau, Xinan Zhou

We consider correlation functions in 6d $(2, 0)$ theories of two $\frac{1}{2}$ -BPS operators inserted away from a $\frac{1}{2}$ -BPS surface defect. In the large central charge limit…

Simplicity of AdS Super Yang-Mills at One Loop

Zhongjie Huang, Bo Wang, Ellis Ye Yuan +1

We perform a systematic bootstrap analysis of four-point one-loop Mellin amplitudes for super gluons in $AdS_{5} \times S^{3}$ with arbitrary Kaluza-Klein weights. The…

Six-Point AdS Gluon Amplitudes from Flat Space and Factorization

Luis F. Alday, Vasco Gonçalves, Maria Nocchi +1

We present a powerful new approach to compute tree-level higher-point holographic correlators. Our method only exploits the flat-space limit, where we point out a novel and importa…

Aspects of higher-point functions in BCFT $_{d}$

Junding Chen, Xinan Zhou

We study three-point correlation functions of scalar operators in conformal field theories with boundaries and interfaces. We focus on two cases where there are one bulk and two bo…