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marcus
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A week from today there will be two Loop talks at Perimeter, which we can expect to have available as online PIRSA video.
http://www.perimeterinstitute.ca/en/Scientific/Seminars/Seminars_Overview/?next=1338177600/
The first, at 2PM, will be the PI Colloquium talk, given by Eugenio Bianchi. Here's the Pirsa link:
http://pirsa.org/12050053
Then at 4PM there will be a QG seminar talk by Hal Haggard.
Haggard got his PhD in Loop QG from UC Berkeley last year and has been teaching courses in the Physics department at Berkeley for the past couple of semesters.
Here is the abstract and Pirsa link for his talk:
http://pirsa.org/12050084
Pentahedral Volume, Chaos, and Quantum Gravity
Speaker(s): Hal Haggard
Abstract: The space of convex polyhedra can be given a dynamical
structure. Exploiting this dynamics we have performed a Bohr-Sommerfeld
quantization of the volume of a tetrahedral grain of space, which is in
excellent agreement with loop gravity. Here we present investigations of the
volume of a 5-faced convex polyhedron. We give for the first time a
constructive method for finding these polyhedra given their face areas and
normals to the faces and find an explicit formula for the volume. This results
in new information about cylindrical consistency in loop gravity and a couple
of surprises about polyhedra. In particular, we are interested in discovering
whether the evolution generated by this volume is chaotic or integrable as this
will impact the interpretation of the spin network basis in loop gravity.
Date: 30/05/2012 - 4:00 pm
Later this summer, Haggard will be one of the invited speakers at the "Groups 29" (Group Theoretical Methods in Physics) conference mentioned in the previous post. He then takes up a 2-year postdoc fellowship at Marseille starting in September. Part of the prior work referred to in the abstract is research he co-authored with Bianchi.
http://www.perimeterinstitute.ca/en/Scientific/Seminars/Seminars_Overview/?next=1338177600/
The first, at 2PM, will be the PI Colloquium talk, given by Eugenio Bianchi. Here's the Pirsa link:
http://pirsa.org/12050053
Then at 4PM there will be a QG seminar talk by Hal Haggard.
Haggard got his PhD in Loop QG from UC Berkeley last year and has been teaching courses in the Physics department at Berkeley for the past couple of semesters.
Here is the abstract and Pirsa link for his talk:
http://pirsa.org/12050084
Pentahedral Volume, Chaos, and Quantum Gravity
Speaker(s): Hal Haggard
Abstract: The space of convex polyhedra can be given a dynamical
structure. Exploiting this dynamics we have performed a Bohr-Sommerfeld
quantization of the volume of a tetrahedral grain of space, which is in
excellent agreement with loop gravity. Here we present investigations of the
volume of a 5-faced convex polyhedron. We give for the first time a
constructive method for finding these polyhedra given their face areas and
normals to the faces and find an explicit formula for the volume. This results
in new information about cylindrical consistency in loop gravity and a couple
of surprises about polyhedra. In particular, we are interested in discovering
whether the evolution generated by this volume is chaotic or integrable as this
will impact the interpretation of the spin network basis in loop gravity.
Date: 30/05/2012 - 4:00 pm
Later this summer, Haggard will be one of the invited speakers at the "Groups 29" (Group Theoretical Methods in Physics) conference mentioned in the previous post. He then takes up a 2-year postdoc fellowship at Marseille starting in September. Part of the prior work referred to in the abstract is research he co-authored with Bianchi.
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