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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We consider early time cosmic evolution in string gas cosmology dominated byopen strings attached to D-branes. After reviewing statistical properties ofopen strings in D-brane backgrounds, we use dilaton-gravity equations todetermine the string frame fields. Although, there are distinctions in theHagedorn regime thermodynamics and dilaton coupling as compared to closedstrings, it seems difficult to avoid Jeans instability and assume thermalequilibrium simultaneously, which is already a known problem for closedstrings. We also examine characteristics of a possible subsequent large radiusregime in this setup.

Open Strings on D-Branes and Hagedorn Regime in String Gas Cosmology