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X-WR-CALNAME:Observing the Big Bang
X-ORIGINAL-URL:https://cosmology.nl
X-WR-CALDESC:Events for Observing the Big Bang
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TZID:Europe/Amsterdam
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TZOFFSETFROM:+0100
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DTSTART:20190331T010000
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DTSTART:20191027T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Amsterdam:20190510T120000
DTEND;TZID=Europe/Amsterdam:20190510T170000
DTSTAMP:20261103T051828
CREATED:20190309T074337Z
LAST-MODIFIED:20190503T133537Z
UID:407-1557489600-1557507600@cosmology.nl
SUMMARY:Leuven Spring 2019
DESCRIPTION:Leuven\, May 10th. The meeting will take place at Mgr. Sencie Instituut (MSI1)\, Erasmusplein 2\, 3000 Leuven . \nProgram \n13:00 – 14:00: Talk by Matthias Bartelmann (Heidelberg University) \nTitle: An analytic approach to non-linear cosmic structure formation\n \nAbstract: \n Numerical simulations of cosmic structure formation are impressively  successful. However\, they have practical and conceptual disadvantages: they  are computationally expensive and thus not very flexible; and they reproduce\,  but do not explain\, the universal properties of cosmic structures. I will  present a new analytic approach to cosmic structures\, which is based on a non- equilibrium statistical field theory for Hamiltonian particle systems. Its  main advantage is that it avoids the notorious shell-crossing problem by  construction and thus allows to enter deeply into the non-linear regime. I  will sketch the concepts of the theory and show the results of several  applications\, e.g. to the cosmological standard model\, axionic dark matter\,  and modified theories of gravity. \n14:00 – 15:00: Talk by Nicola Tamanini(AEI Potsdam) \nTitle: Cosmology with gravitational wave standard sirens: current results and future prospectives\n \nAbstract: \nI will introduce the concept of standard siren\, reviewing the methodologies that one can apply to probe the cosmic expansion using gravitational wave observations. I will then outline the gravitational wave sources that can be used as standard sirens for both Earth-based (LIGO/Virgo) and space-based (LISA) detectors\, pointing out for which of them an electromagnetic counterpart is expected to be observed. I will then discuss the constraints on the Hubble constant recently obtained from GW170817\, which represents the very first standard siren ever discovered\, and discuss future cosmological prospects for LIGO/Virgo. Finally I will present cosmological forecasts for LISA\, which will be able to probe the expansion of the universe at high redshift. \n15:00 – 15:30: Coffee \n15:30 – 16:30: Talk by Marjorie Schillo (Uppsala University) \nTitle: Accelerated expansion from decaying AdS\n \nAbstract: \nI will discuss a recent construction wherein an effective de Sitter spacetime appears as a non-supersymmetric AdS vacuum decays into the\nsupersymmetric vacuum.  Four-dimensional observers are localized on a\nspherical brane which nucleates to facilitate the decay.  The expansion of\nthe brane bubble then leads to an effective four-dimensional de Sitter\nspace.  This construction side-steps the difficulties of constructing\nscale-separated de Sitter vacua or inflating spacetimes in traditional flux\ncompactifications.  I will discuss new developments concerning\nfour-dimensional phenomenology and the embedding of the scenario in string\ntheory. \n 
URL:https://cosmology.nl/event/leuven-spring-2019/
LOCATION:Mgr. Sencie Instituut (MSI1)\, Erasmusplein 2\, Leuven\, 3000\, Belgium
CATEGORIES:THC meeting
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