Working Paper 26
Directed Null Transport: Point-to-Point Light Convergence Across Geometries, Dimensions, and Media
October 2026
Abstract
Which geometries direct a broad family of light rays from one point to another with synchronized arrival? A survey of point-to-point null-geodesic convergence across general relativity, optical geometry, and laboratory analogues, with a proved obstruction lemma for wormhole refocusing and a new invertibility hierarchy for light-transport reconstruction.
Keywords
general relativity, null geodesics, wormholes, gravitational lensing, optical geometry, Maxwell fish-eye, isochronous refocusing, inverse problems