Events at Physics |
Events During the Week of June 5th through June 12th, 2011
Monday, June 6th, 2011
- Condensed Matter Theory Group Seminar
- The Casimir effect in two dimensions and the Weyl problem
- Time: 10:00 am
- Place: 5280 Chamberlin
- Speaker: Luke Langsjoen, University of Virginia
- Abstract: A field theoretical technique for a massless scalar field is used to calculate the Casimir energy of the modes removed by the introduction of a smooth, Dirichlet boundary into two dimensional space. There are formally divergent, cutoff dependent parts of the Casimir energy that are disregarded as unphysical in many treatments of the Casimir effect. However, we show that these contributions are related to geometric properties of the boundary and may be physically relevant. These formally divergent contributions are shown to be closely related to the Weyl problem of the asymptotic distribution of the eigenvalues of the Laplacian. Our results explain why formal regularization techniques fail in even dimension, and we correct the sign of the vacuum induced coefficient of linear tension given in previous treatments. <br>
- Host: Maxim Vavilov & Robert Joynt
Tuesday, June 7th, 2011
- Atomic Physics Seminar
- Preparation and counting of atoms in micro-traps
- Time: 11:00 am
- Place: 5280 Chamberlin
- Speaker: Mikkel Andersen, University of Otago
- Host: Thad Walker
Wednesday, June 8th, 2011
- No events scheduled
Thursday, June 9th, 2011
- No events scheduled
Friday, June 10th, 2011
- No events scheduled