Bulletin of the American Physical Society
Spring 2012 Meeting of the APS Ohio-Region Section
Volume 57, Number 4
Friday–Saturday, April 13–14, 2012; Columbus, Ohio
Session F2: Gravitation and Fields |
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Chair: Christopher Orban, Ohio State University Room: Physics Research Building 1009 |
Saturday, April 14, 2012 8:00AM - 8:12AM |
F2.00001: Cosmic Microwave Background Radiation (CMB) explained using Modern Einstein (Gedanken) Laboratory Experiments Charles Sven Three explanations presented: two old school, unsupported by physics, and a brand new one that best explains all the NASA CMB observations, further incorporates many current experiments conducted by Stanford - SLAC National Accelerator Laboratory among other equivalent organizations, including a very simple setup that may be reproduced in any laboratory designed by the author. [Preview Abstract] |
Saturday, April 14, 2012 8:12AM - 8:24AM |
F2.00002: The Arithmetic of events and a new theory of Gravitation Malek Abbasi Of fundamental importance in physics is the concept of event. This study tries; first, to provide a mathematical background showing how must deal with these events and based on what laws the watches, another important concept used frequently in this research, record them. Armed, then, with this mathematical background, the Gravitational Clouds Theory, a novel theory of gravitation concerning the role of the matter and energy in the universe, is proposed. This completely new theory leads to miscellanies results some of which are: the second Einstein's postulate; the well known identity E = mc2; the time-dilation phenomenon and Fitzgerald-Lorentz contraction. This theory will also explain why indeed we never feel the speed of the Earth, what is the origin of Dark matter-energy and many other extraordinary results associated with cosmology. [Preview Abstract] |
Saturday, April 14, 2012 8:24AM - 8:36AM |
F2.00003: Coherent Perfect Rotation Michael Crescimanno, Nathan Dawson, James Andrews Two classes of conservative, linear, optical rotary effects (optical activity and Faraday rotation) are distinguished by their behavior under time reversal. In analogy with coherent perfect absorption, where counterpropagating light fields are controllably converted into other degrees of freedom, we show that in a linear-conservative medium only time-odd (Faraday) rotation is capable of coherent perfect rotation, by which we mean the complete transfer of counterpropagating coherent light fields into their orthogonal polarization. This highlights the necessity of time reversal odd processes (not just absorption) and coherence in perfect mode conversion and may inform device design. [Preview Abstract] |
Saturday, April 14, 2012 8:36AM - 8:48AM |
F2.00004: Convergence of a Quantum Particle Swarm Optimizer Tyler Stay, Cavendish McKay We examine the convergence of a quantum mechanical particle swarm optimizer (QPSO). A number of possible convergence criteria are examined, including a number of measures of swarm width. In contrast with classical particle swarm optimization algorithms, where measures must be taken to prevent swarm explosion, QPSO can suffer from swarm collapse, reducing the effective population size. We present a method for avoiding swarm collapse which is inspired by both by the statistics of interacting fermions as well as the global optimization method simulated annealing. [Preview Abstract] |
Saturday, April 14, 2012 8:48AM - 9:00AM |
F2.00005: Ab-initio Modeling of Ultra-Intense Laser-Matter Interactions with Cone-coupled Wire Targets Chris Orban, Vladimir Ovchinnikov, Kramer Akli, Douglass Schumacher, Milad Fatenejad, Donald Lamb Current experiments with ultra-intense lasers can potentially yield valuable information on the fast-ignition (FI) approach to achieving high-yield fusion in the laboratory. Using the Particle-In-Cell code LSP and the radiation-hydrodynamics code FLASH, we present simulations that self-consistently model the irradiation of Al cone targets coupled to Cu wires at the Titan laser based at Lawrence Livermore National Laboratory. Our novel approach ensures that the nanosecond time-scale pre-irradiation of the target by leakage light ahead of the main laser pulse is modeled in its full complexity by the FLASH code. By using these results as initial conditions for LSP simulations, the picosecond time-scale interaction of the main pulse with the target can be self-consistently modeled as well. This coupling of the codes has revealed valuable insights into the experimental results, and yield interesting ramifications for the Fast-Ignition route to fusion energy. [Preview Abstract] |
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