University of Cambridge > Talks.cam > Cosmology Lunch > Vacuum Destabilisation by Dense Astrophysical Objects

  Browse A-Z

Log in

Googledetails Microsoftdetails

🔐 Log In

Information on

Subscribing to talksdetails Finding a talkdetails Adding a talkdetails Disseminating talksdetails Help and Documentationdetails

ℹ️ Information

Vacuum Destabilisation by Dense Astrophysical Objects

Download to your calendar using vCal

If you have a question about this talk, please contact Tasos Avgoustidis .

We describe how dense matter environments source a contribution to moduli potentials and analyse the conditions required to initiate either decompactification or a local shift in moduli vevs. This introduces the possibility that dense objects may destabilise the vacuum. We consider astrophysical objects such as neutron stars and cosmic strings as well as cosmological and black hole singularities. We find that neutron stars cannot destabilise realistic Planck coupled moduli, which would require objects many orders of magnitude denser. However gravitational collapse, either in matter-dominated universes or in black hole formation, inevitably leads to a destabilisation of the compact volume causing a super-inflationary expansion of the extra dimensions.

This talk is part of the Cosmology Lunch series.

This talk is included in these lists:

Note that ex-directory lists are not shown.

Other lists

Average on weekdays: 9224.49767712 kWh Wolfson Seminar South, Trinity College Average on weekdays: 9011.16502463 kWh

Other talks

Quantum graphs with a time asymmetry: spectral optimization and spectral statistics Group Work From lab to clinic: an introduction to translational research External Seminar - Jenn Brophy TBC Group Presentation 1 Cooperation for Nature
 

© 2006-2025 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity