C15061 - Noncommutative Geometry and PhysicsNoncommutative Geometry and Physics
http://pirsa.org/podcast/C15061
Science2020http://blogs.law.harvard.edu/tech/rssen-caSat, 25 Jan 2020 07:47:35 -0500Sat, 25 Jan 2020 07:47:35 -0500G180help@perimeterinstitute.capirsa.org<![CDATA[Nonassociative geometry, Hom-associative algebras, and cyclic homology]]>Mohammad Hassanzadeh
http://streamer2.perimeterinstitute.ca/mp3/15090056.mp3
Sciencehttp://streamer2.perimeterinstitute.ca/mp3/15090056.mp3Sat, 12 Sep 2015 09:45:00 -0400<![CDATA[The classification of well behaved simple C*-algebras]]>George Elliott
http://streamer2.perimeterinstitute.ca/mp3/15090057.mp3
Sciencehttp://streamer2.perimeterinstitute.ca/mp3/15090057.mp3Sat, 12 Sep 2015 10:30:00 -0400<![CDATA[Random non-commutative geometries]]>
http://streamer2.perimeterinstitute.ca/mp3/15090058.mp3
Sciencehttp://streamer2.perimeterinstitute.ca/mp3/15090058.mp3Sat, 12 Sep 2015 11:30:00 -0400<![CDATA[The standard model of particle physics as a non-commutative differential graded algebra]]>Latham Boyle
http://streamer2.perimeterinstitute.ca/mp3/15090059.mp3
Sciencehttp://streamer2.perimeterinstitute.ca/mp3/15090059.mp3Sat, 12 Sep 2015 12:15:00 -0400<![CDATA[Spectral Action Models of Gravity and Packed Swiss Cheese Cosmology]]>We consider the spectral action as an action functional for modified gravity on a spacetime that exhibits a fractal structure modeled on an Apollonian packing of 3-spheres (packed swiss cheese) or on a fractal arrangements of dodecahedral spaces. The contributions in the asymptotic expansion of the spectral action, that arise from the real poles of the zeta function, include the Einstein-Hilbert action with cosmological term and conformal and Gauss-Bonnet gravity terms. We show that these contributions are affected by the presence of fractality, which modifies the corresponding effective gravitational and cosmological constants, while an additional term appears in the action, which is entirely due to fractality. This term is further affected by a contribution of oscillatory terms coming from the poles of the zeta function that are off the real line, which are also a property specific to fractals. We show that the shape of the slow-roll potential obtained by scalar perturbations of the Dirac operators is also affected by the presence of fractality. The talk is based on joint work with Adam Ball.
]]>Matilde Marcolli
http://streamer2.perimeterinstitute.ca/mp3/15090060.mp3
Sciencehttp://streamer2.perimeterinstitute.ca/mp3/15090060.mp3Sat, 12 Sep 2015 14:30:00 -0400<![CDATA[Zeta regularized determinants and Quillen's metric in noncommutative geometry]]>Masoud Khalkhali
http://streamer2.perimeterinstitute.ca/mp3/15090061.mp3
Sciencehttp://streamer2.perimeterinstitute.ca/mp3/15090061.mp3Sat, 12 Sep 2015 15:15:00 -0400<![CDATA[The Planck scale and spectral geometry]]>Achim Kempf
http://streamer2.perimeterinstitute.ca/mp3/15090062.mp3
Sciencehttp://streamer2.perimeterinstitute.ca/mp3/15090062.mp3Sat, 12 Sep 2015 16:15:00 -0400<![CDATA[Numerical spectral geometry]]>Mikhail Panine
http://streamer2.perimeterinstitute.ca/mp3/15090063.mp3
Sciencehttp://streamer2.perimeterinstitute.ca/mp3/15090063.mp3Sat, 12 Sep 2015 17:00:00 -0400<![CDATA[Relative locality and Non commutative geometry]]>Laurent Freidel
http://streamer2.perimeterinstitute.ca/mp3/15090064.mp3
Sciencehttp://streamer2.perimeterinstitute.ca/mp3/15090064.mp3Sat, 12 Sep 2015 17:15:00 -0400