Science Investigation 7.2: Measure, or set upper
limits on, the spectral shape of the cosmological stochastic
GW background.
Operational Requirement 7.2: Probe a broken
power-law stochastic background from the early Universe as
predicted, for example, by first order phase
transitions ...
Electroweak phase transition
Process by which the Higgs 'switched on'
In the Standard Model it is a crossover
Possible in extensions that it would be first
order
➥ colliding bubbles then make gravitational waves
Tiny walls to giant bubbles
⬇︎ ?
Fitting everything in is hard
Research goals
Next few years: GW Cosmology for
LISA
Cutting-edge simulations of the
very early universe
Microscale (Monte Carlo), macroscale (hydro)
Dark and visible sectors
After that: The Energy and Gravity Frontiers
Electroweak phase transition and
beyond: CEPC (2030-), ILC (2035-)
Finnish role in European GW missions:
Einstein Telescope (2030-), LISA (2034-)
Complementarity between GW and
colliders
Helsinki: dense matter, early universe, black
holes
Cosmological sources of gravitational waves
A multiscale computational problem
David Weir [he/him/his]
-
davidjamesweir
PROFI-4 Seminars, 28.11.2019
saoghal.net/slides/profi
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