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 Tools annual

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 Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

It will be argued here that the cosmological constant problem exists becauseof the way the vacuum is defined in quantum field theory. It has been known forsome time that for QFT to be gauge invariant certain terms--such as part of thevacuum polarization tensor--must be eliminated either explicitly or by someform of regularization followed by renormalization. It has recently been shownthat lack of gauge invariance is a result of the way the vacuum is defined, andredefining the vacuum so that the theory is gauge invariant may also offer asolution to the cosmological constant problem.

The Vacuum and the Cosmological Constant Problem