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/

Zendy Plus

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

Zendy Tools

Zendy Open

The gauge symmetry is one of the most important concepts in modern physics,but there are two conflicting views on its meaning or interpretation. Thestandard view is that local gauge symmetry is the basis of the pursue offundamental particles and forces in nature. Another view is that the gaugesymmetry is not a symmetry of nature but just a redundancy in description.Naturally, both statements are nothing wrong, but one might feel that there isa slight conceptual conflict between the two points of view. Due to thesubtlety of the subject, however, little literature exists that discusses theroot of such an anxiety. In the present paper, by making full use of theanalytically solvable nature of the quantum Landau problem, we argue that thefamiliar gauge principle plays a critical role in unraveling a subtle mismatchbetween the two viewpoints above. We reveal that there exist two types ofquantities in gauge theories, which should clearly be discriminated. The firstare quantities, which look seemingly gauge-invariant but actually not, whereasthe second are genuinely gauge-invariant quantities, which correspond to directexperimental observables.

Is gauge symmetry vacuous or physical ? : Lessons from the Landau problem as a solvable quantum gauge theoretical system