Simon Fraser University
SFU Cosmology Seminars

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Tuesday, 10 September 2013, 14:00 in P8445B

Prof. Andrei Frolov (SFU)

Intermittent non-Gaussianity

I will talk about phase transitions and entropy production at the end of inflation in the early universe. Dynamics of preheating can convert isocurvature modes of light fields generated during inflation into curvature fluctuations imprinted in observable CMB temperature anisotropy. Curvature fluctuations thus produced are typically non-Gaussian, and caustics in phase space evolution can lead to intermittent patterns on the sky. I will discuss their observational signatures, and our efforts to construct local non-Gaussianity estimators to map out such signal in real data.

Seminars in 2013:

2013-09-10 14:00 in P8445B - Andrei Frolov (SFU): Intermittent non-Gaussianity
2013-09-20 14:30 in AQ3150 - Christopher Stubbs (Harvard University): The dark energy crisis in the longer term (physics colloquium)
2013-10-01 14:00 in P8445B - Ali Narimani (UBC): Minimal parameterizations for modified gravity
2013-10-04 14:30 in AQ3150 - Joseph Polchinski (KITP): The black hole information paradox, alive and kicking (physics colloquium)
2013-10-08 14:00 in P8445B - Yin-Zhe Ma (UBC): Cosmic peculiar velocity field
2013-10-22 14:00 in P8445B - Alireza Hojjati (SFU): Cosmology with strong lensing time delays
2013-10-29 14:00 in P8445B - Levon Pogosian (SFU): Primordial magnetism in CMB polarization
2013-11-01 14:30 in AQ3150 - Neil Turok (Perimeter Institute): On quantum tunnelling (physics colloquium)
2013-11-12 14:00 in P8445B - Jun-Qi Guo (SFU): Spherical collapse in f(R) gravity
2013-11-19 14:00 in P8445B - Jes Ford (UBC): Weighing galaxy clusters with weak lensing magnification
2014-01-28 14:00 in P8445B - Ivan Agullo (Louisiana State University): Conformal anomaly and primordial magnetic fields
2014-03-04 14:00 in P8445B - Thomas Kephart (Vanderbilt University): Helicity conservation and generalized Beltrami fields
2014-04-08 14:00 in P8445B - Zhiqi Huang (CITA, University of Toronto): Inflation trajectories after Planck and BICEP2
2014-05-06 16:00 in Saywell 10081 - Rocky Kolb (University of Chicago): The Quantum and the Cosmos (public lecture)
2014-08-15 14:00 in P8445B - Dmitri Pogosyan (University of Alberta): Topology of the Universe from Planck CMB data

[ See complete seminar archives | iCal feed ]

Modified by Andrei Frolov <frolov@sfu.ca> on 2023-11-01