Bulletin of the American Physical Society
2006 APS March Meeting
Monday–Friday, March 13–17, 2006; Baltimore, MD
Session G1b: Special Prize Session |
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Chair: Charles Clark, National Institute of Standards and Technology Room: Baltimore Convention Center Ballroom IV |
Tuesday, March 14, 2006 8:00AM - 9:48AM |
G1b.00001: BREAK
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Tuesday, March 14, 2006 9:48AM - 10:24AM |
G1b.00002: Prize to a Faculty Member for Research in an Undergraduate Institution Recipient: Laser Scattering in Turbid Media Invited Speaker: Light scattering in random media is an interesting research area from a fundamental and practical point of view. On the theoretical side, the precise relationship between the Maxwell, Boltzmann and diffusion descriptions are presently not very well understood. We have examined the validity of these three approaches based on numerical solution techniques. On the practical side, an improved understanding of this interaction has the potential to lead to new medical imaging devices based on lasers. We will report on our first experimental data and discuss how they can be modeled by Monte-Carlo simulations. Major portions of this research involved several undergraduate students who performed computer simulations and laboratory measurements. This work has been supported by funds from NSF and Research Corporation. S. Menon, Q. Su and R. Grobe, Phys. Rev. Lett. 94, 153904 (2005). S. Menon, Q. Su and R. Grobe, Opt. Lett. 30, 1542-1544 (2005). [Preview Abstract] |
Tuesday, March 14, 2006 10:24AM - 11:00AM |
G1b.00003: Prize to a Faculty Member for Research in an Undergraduate Institution Recipient: Computational Quantum Field Theory Invited Speaker: I will give an overview on recent attempts to solve the time-dependent Dirac equation for the electron-positron field operator. These numerical solutions permit a first temporally and spatially resolved insight into the mechanisms of how an electron-positron pair can be created from vacuum in a very strong force field. This approach has helped to illuminate a wide range of controversial questions. Some of these questions arise for complicated physical situations such as how an electron scatters off a supercritical potential barrier (Klein paradox). This requires the application of quantum field theory to study the combined effect of the pair-production due to the supercriticality of the potential together with the scattering at the barrier involving the Pauli-principle. Other phenomena include Schr\"{o}dinger's Zitterbewegung and the localization problem for a relativistic particle. This work has been supported by the NSF and Research Corporation. P. Krekora, K. Cooley, Q. Su and R. Grobe, Phys. Rev. Lett. 95, 070403 (2005). P. Krekora, Q. Su and R. Grobe, Phys. Rev. Lett. 93, 043004 (2004). P. Krekora, Q. Su and R. Grobe, Phys. Rev. Lett. 92, 040406 (2004). [Preview Abstract] |
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