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Infinite Symmetry Algebras in Four-Dimensional Conformal Field Theories
Elizabeth Himwich, Monica Pate
In generic interacting four-dimensional Lorentzian conformal field theories, an infinite set of universal light-ray operators constructed from the stress tensor is shown to generat…
Light-ray Operators and the Algebra
Elizabeth Himwich, Monica Pate
A universal class of light-ray operators formed from null integrals of the stress tensor is constructed in generic interacting Lorentzian conformal field theories in four spacetime…
Generating Hodges' Graviton MHV Formula with an Ward Identity
Alfredo Guevara, Elizabeth Himwich, Noah Miller
Hodges' formula expresses the tree-level all-multiplicity Einstein gravity MHV amplitude as a matrix determinant. In this work, we prove that Hodges' determinant is generated by an…
Shadow Celestial Operator Product Expansions
Elizabeth Himwich, Monica Pate
The linearized massless wave equation in four-dimensional asymptotically flat spacetimes is known to admit two families of solutions that transform in highest-weight representation…
Sphere free energy of scalar field theories with cubic interactions
Simone Giombi, Elizabeth Himwich, Andrei Katsevich +2
The dimensional continuation approach to calculating the free energy of -dimensional Euclidean CFT on the round sphere has been used to develop its expansion for a n…
in 4D Gravitational Scattering
Elizabeth Himwich, Monica Pate
In four-dimensional asymptotically flat spacetimes, an infinite tower of soft graviton modes is known to generate the symmetry algebra of at tree-level. Here w…
Self-Dual Black Holes in Celestial Holography
Erin Crawley, Alfredo Guevara, Elizabeth Himwich +1
We construct two-dimensional quantum states associated to four-dimensional linearized rotating self-dual black holes in signature Klein space. The states are comprised of g…
Celestial Operator Product Expansions and Symmetry for All Spins
Elizabeth Himwich, Monica Pate, Kyle Singh
The operator product expansion of massless celestial primary operators of arbitrary spin is investigated. Poincaré symmetry is found to imply a set of recursion relations on the op…
Holographic Symmetry Algebras for Gauge Theory and Gravity
Alfredo Guevara, Elizabeth Himwich, Monica Pate +1
All 4D gauge and gravitational theories in asymptotically flat spacetimes contain an infinite number of non-trivial symmetries. They can be succinctly characterized by generalized…
The Soft -Matrix in Gravity
Elizabeth Himwich, Sruthi A. Narayanan, Monica Pate +2
The gravitational -matrix defined with an infrared (IR) cutoff factorizes into hard and soft factors. The soft factor is universal and contains all the IR and collinea…
Uplifting AdS3/CFT2 to Flat Space Holography
Adam Ball, Elizabeth Himwich, Sruthi A. Narayanan +2
Four-dimensional (4D) flat Minkowski space admits a foliation by hyperbolic slices. Euclidean AdS3 slices fill the past and future lightcones of the origin, while dS3 slices fill t…
A Note on the Subleading Soft Graviton
Elizabeth Himwich, Zahra Mirzaiyan, Sabrina Pasterski
We show that the soft part of the charge generating infinitesimal superrotations can be expressed, in harmonic gauge, in terms of metric components evaluated at the boundaries of n…
Celestial Current Algebra from Low's Subleading Soft Theorem
Elizabeth Himwich, Andrew Strominger
The leading soft photon theorem implies that four-dimensional scattering amplitudes are controlled by a two-dimensional (2D) Kac-Moody symmetry that acts on the celestial sp…