340 citations · 574 across the 14 of their papers we have counts for
15 papers
Bound States in 2d Yukawa Theory from Hamiltonian Truncation
Olivier Delouche, Kara Farnsworth, Francesco Riva
We study the spectrum of two-dimensional Yukawa theory using Hamiltonian truncation, with a focus on bound states. We extend the framework of Hamiltonian truncation effective theor…
Hidden Conformal Symmetry of the Discrete Series Scalars in dS
Kara Farnsworth, Kurt Hinterbichler, Samanta Saha
In dimensional de Sitter space, a scalar field has an infinite tower of special tachyonic mass values at which enhanced shift symmetries appear. After modding out by these shif…
Scale and Conformal Invariance on (A)dS
Kara Farnsworth, Kurt Hinterbichler, Ondrej Hulik
We examine the question of scale versus conformal invariance on maximally symmetric curved backgrounds and study general 2-derivative conformally invariant free theories of vectors…
Double Kerr-Schild spacetimes and the Newman-Penrose map
Kara Farnsworth, Michael Graesser, Gabriel Herczeg
The Newman-Penrose map, which is closely related to the classical double copy, associates certain exact solutions of Einstein's equations with self-dual solutions of the vacuum Max…
Scale vs. Conformal Invariance at the IR Fixed Point of Quantum Gravity
Kara Farnsworth, Kurt Hinterbichler, Ondrej Hulik
We examine the question of scale vs. conformal invariance for the linearized Einstein-Hilbert action, which describes the IR fixed point of quantum gravity. In , although th…
Hamiltonian Truncation Effective Theory
Timothy Cohen, Kara Farnsworth, Rachel Houtz +1
Hamiltonian truncation is a non-perturbative numerical method for calculating observables of a quantum field theory. The starting point for this method is to truncate the interacti…
Twistor Space Origins of the Newman-Penrose Map
Kara Farnsworth, Michael L. Graesser, Gabriel Herczeg
Recently, we introduced the "Newman-Penrose map," a novel correspondence between a certain class of solutions of Einstein's equations and self-dual solutions of the vacuum Maxwell…
On the Conformal Symmetry of Exceptional Scalar Theories
Kara Farnsworth, Kurt Hinterbichler, Ondrej Hulik
The DBI and special galileon theories exhibit a conformal symmetry at unphysical values of the spacetime dimension. We find the Lagrangian form of this symmetry. The special confor…
The Newman-Penrose Map and the Classical Double Copy
Gilly Elor, Kara Farnsworth, Michael L. Graesser +1
Gauge-gravity duality is arguably our best hope for understanding quantum gravity. Considerable progress has been made in relating scattering amplitudes in certain gravity theories…
Weyl versus Conformal Invariance in Quantum Field Theory
Kara Farnsworth, Markus A. Luty, Valentina Prilepina
We argue that conformal invariance in flat spacetime implies Weyl invariance in a general curved background metric for all unitary theories in spacetime dimensions . We…
The Final SDSS High-Redshift Quasar Sample of 52 Quasars at z>5.7
Linhua Jiang, Ian D. McGreer, Xiaohui Fan +14
We present the discovery of nine quasars at identified in the Sloan Digital Sky Survey (SDSS) imaging data. This completes our survey of quasars in the SDSS footp…
Positive Energy Conditions in 4D Conformal Field Theory
Kara Farnsworth, Markus A. Luty, Valentina Prilepina
We argue that all consistent 4D quantum field theories obey a spacetime-averaged weak energy inequality , where is the size of the smearing r…
Scale Invariance, Conformality, and Generalized Free Fields
Anatoly Dymarsky, Kara Farnsworth, Zohar Komargodski +2
This paper addresses the question of whether there are 4D Lorentz invariant unitary quantum field theories with scale invariance but not conformal invariance. An important loophole…
Scale Invariance plus Unitarity Implies Conformal Invariance in Four Dimensions
Kara Farnsworth, Markus A. Luty, Valentina Prelipina
We give a non-perturbative proof that any 4D unitary and Lorentz-invariant quantum field theory with a conserved scale current is in fact conformally invariant. We show that any sc…
SDSS J094604.90+183541.8: A Gravitationally Lensed Quasar at z=4.8
Ian D. McGreer, Patrick B. Hall, Xiaohui Fan +6
We report the discovery of a gravitationally lensed quasar identified serendipitously in the Sloan Digital Sky Survey (SDSS). The object, SDSS J094604.90+183541.8, was initially ta…