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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Marina Cortes


PIRSA:20010091  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Towards inclusion of biology in cosmology
Speaker(s): Marina Cortes
Abstract: Cosmologists wish to explain how our universe, in all its complexity, could ever have come about. This is the problem of initial conditions and the first step towards its solution is the assessment of the universe’s entropy today. It is widely agreed upon that the entropy of vacuum energy, given b... read more
Date: 28/01/2020 - 11:00 am

PIRSA:19110104  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Towards inclusion of biology in cosmology
Speaker(s): Marina Cortes
Abstract: Cosmologists wish to explain how our universe, in all its complexity, could ever have come about. For that, we assess the number degrees of freedom in our Universe now. This plays the role of entropy in thermodynamics of the Universe, and reveals the magnitude of the problem of initial conditions to... read more
Date: 22/11/2019 - 2:00 pm

PIRSA:19070075  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Why is time always moving forwards and never backwards?
Speaker(s): Marina Cortes
Abstract: Why is the future different from the past? The most poignant property about the world around us is that time is always moving forward, yet, as odd as it may seem, our current theories of physics cannot account for this property. In all of fundamental physics, the future and the past are entirely sim... read more
Date: 23/07/2019 - 10:30 am
Collection: ISSYP 2019

PIRSA:19050031  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Our time-symmetric lifestyle
Speaker(s): Marina Cortes
Abstract: Fundamental physics traditionally views the dynamical laws governing the world as time reversal invariant. The evident arrow of time of nature is then held to be an accident, emerging as we coarse grain and originating in the improbable choice of initial conditions. The main pillar which supports th... read more
Date: 14/05/2019 - 11:00 am

PIRSA:16060110  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The origin of arrows of time II cont.
Abstract:
Date: 27/06/2016 - 4:30 pm
Collection: Time in Cosmology

PIRSA:16060109  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The origin of arrows of time II
Abstract:
Date: 27/06/2016 - 2:00 pm
Collection: Time in Cosmology

PIRSA:16060107  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Welcome and Opening Remarks
Abstract:
Date: 27/06/2016 - 10:00 am
Collection: Time in Cosmology

PIRSA:14020139  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Our Lopsided Universe
Speaker(s): Marina Cortes
Abstract: After a short introduction to open inflation and the observed large-scale cosmic microwave anomalies, which have been confirmed by the Planck satellite, I'll argue that the anomalies are naturally explained in the context of a marginally-open, negatively curved universe. I'll look in particular at t... read more
Date: 11/02/2014 - 11:00 am

PIRSA:07120018  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Can We Detect Dynamics in Dark Energy?
Speaker(s): Marina Cortes
Abstract: We highlight the unexpected impact of nucleosynthesis on the detectability of tracking quintessence dynamics at late times, showing that dynamics may be invisible until Stage-IV dark energy experiments (DUNE, JDEM, LSST, SKA). Nucleosynthesis forces |wŒ(0)| <0.2 for the models we consider and strongly limits potential deviations from _LCDM . Surprisingly, the standard CPL parametrisation, w(z) = w0 +waz/(1+z), cannot match the nucleosynthesis bound for minimally coupled tracking scalar fields. Given that such models are arguably the best-motivated alternatives to a cosmological constant these results may significantly impact future cosmological survey design and imply that dark energy may be dynamical even if we do not detect any dynamics in the next decade.
Date: 03/12/2007 - 3:15 pm
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