Publications (20)
On duality of color and kinematics in (A)dS momentum space
Soner Albayrak, Savan Kharel, David Meltzer
We explore color-kinematic duality for tree-level AdS/CFT correlators in momentum space. We start by studying the bi-adjoint scalar in AdS at tree-level as an illustrative example.…
Detectors in weakly-coupled field theories
Simon Caron-Huot, Murat Kologlu, Petr Kravchuk +2
We initiate a study of asymptotic detector operators in weakly-coupled field theories. These operators describe measurements that can be performed at future null infinity in a coll…
The Inflationary Wavefunction from Analyticity and Factorization
David Meltzer
We study the analytic properties of tree-level wavefunction coefficients in quasi-de Sitter space. We focus on theories which spontaneously break dS boost symmetries and can produc…
Unitarity Methods in AdS/CFT
David Meltzer, Eric Perlmutter, Allic Sivaramakrishnan
We develop a systematic unitarity method for loop-level AdS scattering amplitudes, dual to non-planar CFT correlators, from both bulk and boundary perspectives. We identify cut ope…
CFT Unitarity and the AdS Cutkosky Rules
David Meltzer, Allic Sivaramakrishnan
We derive the Cutkosky rules for conformal field theories (CFTs) at weak and strong coupling. These rules give a simple, diagrammatic method to compute the double-commutator that a…
Non-Abelian Binding Energies from the Lightcone Bootstrap
Daliang Li, David Meltzer, David Poland
We analytically study the lightcone limit of the conformal bootstrap for 4-point functions containing scalars charged under global symmetries. We show the existence of large spin d…
Conformal Collider Physics from the Lightcone Bootstrap
Daliang Li, David Meltzer, David Poland
We analytically study the lightcone limit of the conformal bootstrap equations for 4-point functions containing global symmetry currents and the stress tensor in 3d CFTs. We show t…
The Lorentzian inversion formula and the spectrum of the 3d O(2) CFT
Junyu Liu, David Meltzer, David Poland +1
We study the spectrum and OPE coefficients of the three-dimensional critical O(2) model, using four-point functions of the leading scalars with charges 0, 1, and 2 (, , and…
Beyond : Gravitational Couplings to Matter and the Stress Tensor OPE
David Meltzer, Eric Perlmutter
We derive constraints on the operator product expansion of two stress tensors in conformal field theories (CFTs), both generic and holographic. We point out that in large CFTs…
A Proof of the Conformal Collider Bounds
Diego M. Hofman, Daliang Li, David Meltzer +2
In this paper, we prove that the "conformal collider bounds" originally proposed by Hofman and Maldacena hold for any unitary parity-preserving conformal field theory (CFT) with a…
Dispersion Formulas in QFTs, CFTs, and Holography
David Meltzer
We study momentum space dispersion formulas in general QFTs and their applications for CFT correlation functions. We show, using two independent methods, that QFT dispersion formul…
AdS/CFT Unitarity at Higher Loops: High-Energy String Scattering
David Meltzer
What is the space of weakly-coupled, gravitational theories which contain massive, higher-spin particles? This class of theories is highly constrained and it is conjectured their u…
Model-Dependence of Minimal-Twist OPEs in Holographic CFTs
A. Liam Fitzpatrick, Kuo-Wei Huang, David Meltzer +2
Following recent work on heavy-light correlators in higher-dimensional conformal field theories (CFTs) with a large central charge , we clarify the properties of stress tensor…
Bounds on Triangle Anomalies in (3+1)d
Ying-Hsuan Lin, David Meltzer, Shu-Heng Shao +1
How many charged degrees of freedom are necessary to accommodate a certain amount of 't Hooft anomaly? Using the conformal bootstrap for the four-point function of flavor current m…
The Inversion Formula and 6j Symbol for 3d Fermions
Soner Albayrak, David Meltzer, David Poland
In this work we study the symbol of the conformal group for fermionic operators. In particular, we study 4-point functions containing two fermions and two scalars and als…
Conformal Bootstrap in the Regge Limit
Daliang Li, David Meltzer, David Poland
We analytically solve the conformal bootstrap equations in the Regge limit for large N conformal field theories. For theories with a parametrically large gap, the amplitude is domi…
More Analytic Bootstrap: Nonperturbative Effects and Fermions
Soner Albayrak, David Meltzer, David Poland
We develop the analytic bootstrap in several directions. First, we discuss the appearance of nonperturbative effects in the Lorentzian inversion formula, which are exponentially su…
Catapult Dynamics and Phase Transitions in Quadratic Nets
David Meltzer, Min Chen, Junyu Liu
Neural networks trained with gradient descent can undergo non-trivial phase transitions as a function of the learning rate. In \cite{lewkowycz2020large} it was discovered that wide…
Bootstrapping Mixed Correlators in 4D SCFTs
Daliang Li, David Meltzer, Andreas Stergiou
The numerical conformal bootstrap is used to study mixed correlators in superconformal field theories (SCFTs) in spacetime dimensions. Systems of four-point f…
Higher Spin ANEC and the Space of CFTs
David Meltzer
We study the positivity properties of the leading Regge trajectory in higher-dimensional, unitary, conformal field theories (CFTs). These conditions correspond to higher spin gener…