High Energy Physics News & Events

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From Hubble to Bubble - gravitational waves from phase transitions after inflation

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Speaker
Andreas Mantziris (University of Porto)
Event date
Venue
Hybrid: Sala Sousa Pinto and Zoom
Event type

The prospect of a stochastic gravitational wave (GW) background from the primordial universe offers a promising new window for cosmology and fundamental physics.

Numerical evolution of well-posed field theories with anisotropic scaling

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Speaker
Marcelo Rubio (SISSA, Trieste)
Event date
Venue
On-site: Room TBD
Event type
Dynamical equations exhibiting an anisotropic scaling between space 
and time admit a dispersive nature, as they contain higher-order spatial derivatives, 
but remain second order in time.

Signatures of domain wall networks: from gravitational waves to primordial black holes

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Speaker
Ricardo Ferreira (University of Coimbra)
Event date
Venue
Hybrid: Sala Sousa Pinto and Zoom
Event type

The Domain Wall (DW) problem is the fact that DW networks that result from the spontaneous breaking of discrete symmetries tend to dominate the universe's energy budget.
However, if the symmetry is not exact the network annihilates and the problem turns into a virtue, as the network tends to be an abundant component before its collapse, and is thus easier to probe.