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SUMMARY:Quantum Vacuum and Gravitation: Testing General Relativity in Cosm
ology
DTSTART;VALUE=DATE-TIME:20170313T070000Z
DTEND;VALUE=DATE-TIME:20170324T180000Z
DTSTAMP;VALUE=DATE-TIME:20191208T065945Z
UID:indico-event-72@indico.mitp.Uni-Mainz.DE
DESCRIPTION:General Relativity has successfully passed all experimental te
sts\, including the spectacular recent detection of gravitational waves by
LIGO\, a century after their prediction. Yet Einstein’s classical theor
y remains unreconciled to quantum theory.\n\nQuantum theory and gravity co
me into closest contact in two areas also at the forefront of observationa
l cosmology and astrophysics\, namely in the physics of the accelerating u
niverse and of gravitational collapse to a ‘black hole.’ The paradoxes
that beset both arise only when quantum vacuum fluctuations in gravitatio
n are considered.\n\nTaken at face value\, present observations imply that
some 72% of the energy in the universe is attributable to the energy of t
he vacuum itself\, with a negative pressure p = - ρ. Elucidating the natu
re and dynamics of this vacuum dark energy and the cosmological ‘constan
t’ is widely recognized as the most pressing problem of cosmology and fu
ndamental physics today.\n\nThe final state of gravitational collapse is t
he second circumstance where quantum vacuum fluctuations in gravity again
come into play. As in cosmology\, difficulties appear at this interface\,
for example in the ‘information paradox’ posed by the enormous Bekenst
ein-Hawking entropy supposedly associated with a black hole. The resolutio
n of these and related paradoxes and the true nature of the interior of a
‘black hole’ remain very much open questions.\n\nIn the next few years
we are poised to realize an enormous increase in observational informatio
n about the Universe’s Large Scale Structure\, as well as potentially di
rect evidence for or against black hole horizons in tests of strong field
gravity. The SDSS-BOSS baryon acoustic oscillation survey\, the Atacama Co
smology Telescope\, numerous weak lensing surveys\, and the Dark Energy Su
rvey will greatly expand our knowledge of structure in the Universe. Imagi
ng and X-ray spectroscopic observations of accreting black holes with curr
ent and future instruments will lead to the first direct test of the ‘no
-hair’ theorem of spinning black holes. LIGO is expected to provide evid
ence of many more detections of gravitational waves from compact sources t
hat will test GR in the strong-field and near horizon limit. The Event Hor
izon Telescope is closing in on the first images of the near horizon regio
n of the supermassive object Sgr A* in the center of the Galaxy. As in cos
mology\, we are entering an era when a fundamental conundrum at the heart
of reconciling quantum physics with Einstein’s theory will become illumi
nated at long last by observational data.\n\nThis intensive two week progr
am at the MITP seeks to bring a select group of theoretical physicists wit
h expertise in Quantum Field Theory and General Relativity\, together with
observational cosmologists and astrophysicists\, in order to develop new
approaches to these longstanding problems in the Quantum Vacuum and Gravit
ation Theory\, with the goal of confronting viable theoretical ideas to th
e wealth of observational data that is now becoming available.\n\nSpecific
Topics to be considered are:\n\n\n Role of Scalar and Non-scalar field
s in Cosmology\n \n Trace Anomaly Induced Effective Action and Dynam
ics\n \n \n Non-ideal Cosmological Fluids and Bulk Viscosity\n
\n \n Spatially Inhomogeneous Cosmology\n \n \n Dynamical
Vacuum Energy\n \n \n Primordial Non-Gaussianity and Large Scale
Structure\n \n \n Anomalies in the CMB and Hubble expansion\n
\n \n Quantum Effects at ‘Black Hole’ Horizons and Interiors\n
\n \n Gravitational Waves\n \n \n Strong Field Astrophysi
cal Tests of General Relativity\n \n\n\nThe Scientific Program will be
posted shortly.\n\nThe Distinguished Participants in the Program include:\
n\n\n Akhmedov\, E.\n Antoniadis\, I.\n Argullo\, I.\n Bartelm
ann\, M.\n Barvinsky\, A.\n Bertacca\, D.\n Buonanno\, A.\n Bu
rgess\, C. P.\n Crocce\, H. M.\n Dimastrogiovanni\, E.\n Durrer\,
R.\n Fabris\, J.\n Fasiello\, M.\n Finelli\, F.\n Frolov\, V.
\n Glavan\, D.\n Heisenberg\, L.\n Kiefer\, C.\n Maroto\, A. L
opez\n Mazumdar\, A.\n Pani\, P.\n Prokopec\, T.\n Raveri\, M.
\n Reuter\, M.\n Schwarz\, D.\n Serreau\, J.\n Starkman\, G.\n
Starobinsky\, A. A.\n Tolley\, A.\n Trodden\, M.\n Wijewardha
na\, R.\n Yunes\, N.\n Zhitnitsky\, A.\n\n\nhttps://indico.mitp.uni-
mainz.de/event/72/
LOCATION:Mainz Institute for Theoretical Physics\, Johannes Gutenberg Univ
ersity 02.430
URL:https://indico.mitp.uni-mainz.de/event/72/
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