English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The relation between two time physics (2T-physics) and the ordinary one timeformulation of physics (1T-physics) is similar to the relation between a3-dimensional object moving in a room and its multiple shadows moving on wallswhen projected from different perspectives. The multiple shadows as seen byobservers stuck on the wall are analogous to the effects of the 2T-universe asexperienced in ordinary 1T spacetime. In this paper we develop some of thequantitative aspects of this 2T to 1T relationship in the context of fieldtheory. We discuss 2T field theory in d+2 dimensions and its shadows in theform of 1T field theories when the theory contains Klein-Gordon, Dirac andYang-Mills fields, such as the Standard Model of particles and forces. We showthat the shadow 1T field theories must have hidden relations among themselves.These relations take the form of dualities and hidden spacetime symmetries. Asubset of the shadows are 1T field theories in different gravitationalbackgrounds (different space-times) such as the flat Minkowski spacetime, theRobertson-Walker expanding universe, AdS(d-k) x S(k) and others, includingsingular ones. We explicitly construct the duality transformations among thisconformally flat subset, and build the generators of their hidden SO(d,2)symmetry. The existence of such hidden relations among 1T field theories, whichcan be tested by both theory and experiment in 1T-physics, is part of theevidence for the underlying d+2 dimensional spacetime and the unifying2T-physics structure.

Dualities among 1T-Field Theories with Spin, Emerging from a Unifying 2T-Field Theory