25 citations · 67 across the 11 of their papers we have counts for
11 papers
Quantum Properties of Non-Dirichlet Boundary Conditions in Gravity
Patrick Draper, Manthos Karydas, Hao Zhang
The Euclidean path integral for gravity is enriched by the addition of boundaries, which provide useful probes of thermodynamic properties. Common boundary conditions include Diric…
The thermal representation of conformal ladder integrals
Manthos Karydas, Songyuan Li, Anastasios C. Petkou +1
We present the details of a recently discovered representation of conformal four-point ladder integrals as thermal one-point functions in scalar field theories. We show that the co…
On the geometric origin of the energy-momentum tensor improvement terms
Damianos Iosifidis, Manthos Karydas, Anastasios Petkou +1
In a flat background, the canonical energy momentum tensor of Lorentz and conformally invariant matter field theories can be improved to a symmetric and traceless tensor that gives…
On the quantum mechanics of entropic forces
Daniel Carney, Manthos Karydas, Thilo Scharnhorst +2
It was conjectured thirty years ago that gravity could arise from the entropic re-arrangement of information. In this paper, we offer a set of microscopic quantum models which real…
Response of interferometers to the vacuum of quantum gravity
Daniel Carney, Manthos Karydas, Allic Sivaramakrishnan
It has recently been suggested that exotic quantum gravity effects could lead to large vacuum fluctuations, potentially observable with realistic detectors. Experiments are current…
Breakdown of Field Theory in Near-Horizon Regions
Tom Banks, Patrick Draper, Manthos Karydas
We discuss back-reaction in the semiclassical treatment of quantum fields near a black hole. When the state deviates significantly from Hartle-Hawking, simple energetic considerati…
Conformal graphs as twisted partition functions
Manthos Karydas, Songyuan Li, Anastasios C. Petkou +1
We show that a class of -loop conformal ladder graphs correspond to twisted partition functions of free massive complex scalars in dimensions. The graphs arise as four-…
Path Integral Factorization and the Gravitational Effective Action
Patrick Draper, Szilard Farkas, Manthos Karydas
We discuss the factorization and continuity properties of fields in the Euclidean gravitational path integral with higher dimension operators constructed from powers of the Riemann…
Vacuum Decay in Time-Dependent Backgrounds
Patrick Draper, Manthos Karydas, Hao Zhang
We develop semiclassical methods for studying bubble nucleation in models with parameters that vary slowly in time. Introducing a more general rotation of the time contour allows a…
Weyl-Ambient Geometries
Weizhen Jia, Manthos Karydas, Robert G. Leigh
Weyl geometry is a natural extension of conformal geometry with Weyl covariance mediated by a Weyl connection. We generalize the Fefferman-Graham (FG) ambient construction for conf…
Obstruction Tensors in Weyl Geometry and Holographic Weyl Anomaly
Weizhen Jia, Manthos Karydas
Recently a generalization of the Fefferman-Graham gauge for asymptotically locally AdS spacetimes, called the Weyl-Fefferman-Graham (WFG) gauge, has been proposed. It was shown tha…