4 papers
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…
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…
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 from symmetry constraints and consistency conditions. Compared to previous b…
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…