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 Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

The Thermofield Dynamics (TFD) formalism is considered. In this context, aLorentz-breaking scalar field theory is introduced. In contrast to theMatsubara formalism, the best-known approach to introducing the temperatureeffect, TFD is a real-time formalism and is a topological field theory. Whilein Matsubara the temperature effects are introduced as a consequence of acompactification of the field in a finite interval on the time axis, in the TFDthis effect emerges through a condensed state related to the Bogoliubovtransformation. An advantage of the TFD formalism is that different topologies,which lead to different effects, can be chosen. Here, three differenttopologies are considered. Then the Stefan-Boltzmann law and Casimir effect atzero and non-zero temperature are calculated. This is a unique feature of TFD,which allows us to treat different phenomena in the same way.

TFD formalism: applications to the scalar field in a Lorentz-violating theory