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1. Holographic thermal correlators revisited

   https://doi.org/10.1007/JHEP11(2021)139  

   Krishna, Hare; Rodriguez-Gomez, D. (November 2021, Journal of High Energy Physics)

   A bstract We study 2-point correlation functions for scalar operators in position space through holography including bulk cubic couplings as well as higher curvature couplings to the square of the Weyl tensor. We focus on scalar operators with large conformal dimensions. This allows us to use the geodesic approximation for propagators. In addition to the leading order contribution, captured by geodesics anchored at the insertion points of the operators on the boundary and probing the bulk geometry thoroughly studied in the literature, the first correction is given by a Witten diagram involving both the bulk cubic coupling and the higher curvature couplings. As a result, this correction is proportional to the VEV of a neutral operator O k and thus probes the interior of the black hole exactly as in the case studied by Grinberg and Maldacena [13]. The form of the correction matches the general expectations in CFT and allows to identify the contributions of T n O k (being T n the general contraction of n energy-momentum tensors) to the 2-point function. This correction is actually the leading term for off-diagonal correlators (i.e. correlators for operators of different conformal dimension), which can then be computed holographically in this way. 

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2. Flux correlators and semiclassics

   https://doi.org/10.1007/JHEP03(2024)067  

   Firat, Eren; Monin, Alexander; Rattazzi, Riccardo; Walters, Matthew T (March 2024, Journal of High Energy Physics)

   A<sc>bstract</sc> We consider correlators for the flux of energy and charge in the background of operators with large global U(1) charge in conformal field theory (CFT). It has recently been shown that the corresponding Euclidean correlators generically admit a semiclassical description in terms of the effective field theory (EFT) for a conformal superfluid. We adapt the semiclassical description to Lorentzian observables and compute the leading large charge behavior of the flux correlators in general U(1) symmetric CFTs. We discuss the regime of validity of the large charge EFT for these Lorentzian observables and the subtleties in extending the EFT approach to subleading corrections. We also consider the Wilson-Fisher fixed point ind= 4 −ϵdimensions, which offers a specific weakly coupled realization of the general setup, where the subleading corrections can be systematically computed without relying on an EFT. 

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3. Multipoint correlators in multifield cosmology

   Panagopoulos, George; Silverstein, Eva (March 2020, ArXivorg)

   null (Ed.)
4. Spectral determinants for twist field correlators

   https://doi.org/10.1103/PhysRevD.97.086008  

   Belitsky, A. V. (April 2018, Physical Review D)
5. Exploring non-linear correlators on AGP

   https://doi.org/10.1063/5.0039618  

   Khamoshi, Armin; Chen, Guo P.; Henderson, Thomas M.; Scuseria, Gustavo E. (February 2021, The Journal of Chemical Physics)