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 geometric properties of General Relativity are reconsidered as aparticular nonlinear interaction of fields on a flat background where theperceived geometry and coordinates are "physical" entities that areinterpolated by a patchwork of observable bodies with a nonintuitiverelationship to the underlying fields. This more general notion of gauge inphysics opens an important door to put all fields on a similar standing butrequires a careful reconsideration of tensors in physics and the conventionalwisdom surrounding them. The meaning of the flat background and the inducedconserved quantities are discussed and contrasted with the "observable"positive definite energy and probability density in terms of the inducedphysical coordinates. In this context, the Dirac matrices are promoted todynamic proto-gravity fields and the keeper of "physical metric" information.Independent sister fields to the wavefunctions are utilized in a bilinearrather than a quadratic lagrangian in these fields. This construction greatlyenlarges the gauge group so that now proving causal evolution, relative to thephysical metric, for the gauge invariant functions of the fields requires boththe stress-energy conservation and probability current conservation laws.Through a Higgs-like coupling term the proto-gravity fields generate a welldefined physical metric structure and gives the usual distinguishing of gravityfrom electromagnetism at low energies relative to the Higgs-like coupling. Theflat background induces a full set of conservation laws but results in the needto distinguish these quantities from those observed by recording devices andobservers constructed from the fields.

Gauge Freedom and Relativity: A Unified Treatment of Electromagnetism, Gravity and the Dirac Field