EDITORS' SUGGESTION
It was conjectured that a particular two-dimensional gravity, Jackiw–Teitelboim (JT) gravity, is dual to a single-trace one-matrix Random Matrix Model (RMM). The authors extend this duality to JT gravity minimally coupled to a free massive scalar field and a single-trace two-matrix model. They study in detail the matching of genus zero one- and two-boundary expectation values in the matrix model to the gravitational disk correlators.
Daniel Louis Jafferis, David K. Kolchmeyer, Baur Mukhametzhanov, and Julian Sonner
Phys. Rev. D 108, 066015 (2023)
EDITORS' SUGGESTION
Due to non-linearities, the two body problem in tensor-scalar theory with kinetic screening is notoriously difficult to solve. In this work, the authors present an analytical solution to this problem and validate it with numerical simulations. They demonstrate that the efficiency of the screening depends on the mass ratio of the two bodies.
Mateja Bošković and Enrico Barausse
Phys. Rev. D 108, 064033 (2023)
EDITORS' SUGGESTION
The self-force problem in gravity is an approach to the two-body problem in which the mass ratio is extreme enough that the smaller-mass body can be usefully treated as a test particle to the lowest order in the mass ratio. In this paper, frequency domain methods, which are particularly suited for bound orbital motion, are developed in an innovative way so that they can be applied to study hyperbolic scattering in the “toy” problem of a scalar charge. Frequency domain methods as developed here may prove to be a promising approach to the full gravitational self-force problem.
Christopher Whittall and Leor Barack
Phys. Rev. D 108, 064017 (2023)