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 construct an exact time-dependent solution in $D=4$, ${\cal N}=4$ gaugedsupergravity, where the gauge fields of the $U(1)\times U(1)$ subgroup of the$SO(4)$ carry independent conserved charges. The solution describes a decayingwhite hole that settles down to the final state as a static charged black hole.We analyze the global structure and lift the solution back to $D=11$supergravity. We further extend the theory by adding an extra term in thescalar potential and obtain a more general class of collapse solutions. Theresult constitutes a charged generalization of the Roberts solution and thedynamical scalar-hairy black hole solutions that have been very recently foundby us. The generalized Roberts solutions demonstrate that a scalar coupled togravity can be unstable even when it is confined by a scalar potential with afixed point.

Exact Collapse Solutions in D=4, N=4 Gauged Supergravity and Their Generalizations