Bulletin of the American Physical Society
2008 Joint Spring Meeting of the Texas Sections of APS, AAPT, and Zone 13 of SPS
Volume 53, Number 1
Thursday–Saturday, March 6–8, 2008; Corpus Christi, Texas
Session APS1: Atomic, Molecular, Optical and General Physics |
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Chair: Mirley Balasubramanya, Texas A and M Corpus Christi Room: Omni Corpus Christi Hotel Marina Tower Padre A |
Friday, March 7, 2008 10:30AM - 10:42AM |
APS1.00001: Light/Gravity Conversion Equation Paul Gill This abstract is focused on detailing my groundbreaking development of the relationship of light and gravity that incorporates a precise insight of how perception and consciousness are involved in the fabric of our dimension. \underline {Equation}: 2g e\^{}K = (E$\phi $/B$\phi )$* $\alpha $ *$\smallint $\^{o} dt (bounded by positive and negative infinity) g = gravition E$\phi $ = electrical energy flux B$\phi $ = magnetic energy flux $\alpha \quad =$ photon K = force of perception \^{o} = `void and action' vector field (unit basis LCU or links of consciousness) This is an equation that not only identifies the linkage of light to gravity, but also incorporates the force of perception as a mechanism of manifestation from the void and action field of consciousness. The equation explains how a pair of gravitons are effected by the force of perception and carried via magnetic energy outward in a phase change of electrical form of the photon bounded by time. The `material' for this energy movement is a LCU that is bound to a specific time period across a vector field. One can view gravity as being manifest by the photon transform. The graviton and photon are composed of LCUs. These LCUs combines to form a unit of electromagnetic energy in wave from a void and action vector field. [Preview Abstract] |
Friday, March 7, 2008 10:42AM - 10:54AM |
APS1.00002: Spectroscopic Analysis of Nd$^{3+}$:Y$_{2}$O$_{3}$ Nanocrystals for Photonic and Biomedical Applications Robert C. Dennis, Kelly L. Nash, John B. Gruber, Dhiraj K. Sardar Spectroscopic properties are investigated for Nd$^{3+}$ in nanocrystalline Nd$^{3+}$:Y$_{2}$O$_{3}$. Room temperature absorption intensities of Nd$^{3+}$(4$f^{3})$ transitions in synthesized Nd$^{3+}$:Y$_{2}$O$_{3}$ nanocrystals have been analyzed using the Judd-Ofelt (J-O) approach in order to obtain the phenomenological intensity parameters. The J-O intensity parameters are used to calculate the spontaneous emission probabilities, radiative lifetimes, and branching ratios of the Nd$^{3+}$ transitions from the upper multiplet manifolds to the corresponding lower-lying multiplet manifolds $^{2S+1}L_{J}$ of Nd$^{3+}$(4$f^{3})$. A comparison between the spectroscopic properties of the Nd$^{3+}$ nanocrystals suspended in epoxy, Chitosan, and 2-hydoxyethyl methacrylate (HEMA) has been performed. This study suggests that synthesized Nd$^{3+}$:Y$_{2}$O$_{3}$ nanocrystals could be an excellent alternative to single-crystal Ho$^{3+}$:Y$_{2}$O$_{3}$ for various photonic applications, in particularly biosensors, when used in the near infrared (0.8 to 0.9 $\mu $m ) region. *This research was supported in part by the National Science Foundation Grant No. DMR-0602649 and the NSF-sponsored CBST at UC Davis under the cooperative agreement No. PHY-0120999. [Preview Abstract] |
Friday, March 7, 2008 10:54AM - 11:06AM |
APS1.00003: Digital Micromirror Device (DMD) Holographic Data Storage Update and Optical Analysis Daniel Bullock, Toni Sauncy, Charles Allen The current working and proposed designs for holographic data storage are based on the transmission hologram, and most of them are considering the use of a Digital Micromirror Device (DMD) as the object using the array of bits. This research project is to consider the use of reflection holography in the system for the simplicity usually associated with holograms of that type. However, issues arise in the practical application of reflection holographic data storage when minification and multiple layering are considered. Other issues include eliminating incidental writing and automating the optics to write an entire disc. The nature of these complications and the theoretical solutions are discussed in this presentation. [Preview Abstract] |
Friday, March 7, 2008 11:06AM - 11:18AM |
APS1.00004: Principle of Least Action and Approximations in Quantum Mechanics Donald Kobe A Lagrangian together with the Principle of Least Action (PLA) is a unifying approach used in all areas of physics to derive their fundamental equations. In quantum mechanics this approach can be used to derive the Schr\"odinger equation. The PLA may also be used to obtain approximate equations in quantum mechanics by using time-dependent trial wave functions. For a system with a time-independent Hamiltonian the PLA can be reduced to the Rayleigh-Ritz variational principle of time-independent quantum mechanics. For a system of many bosons a trial wave function that is a product of time-dependent single particle wave functions may be used in the PLA to obtain the time-dependent Gross-Pitaeveski equation, which is useful in describing a Bose- Einstein condensate. For a system of many fermions a trial wave function that is a product of time-dependent single particle orbitals may be used in the PLA to obtain the time-dependent Hartree-Fock equations, which are useful in atomic and nuclear physics. [Preview Abstract] |
Friday, March 7, 2008 11:18AM - 11:30AM |
APS1.00005: Semiclassical electron-radiation-ion dynamics: past successes and future extensions Roland Allen, Meng Gao, Petra Sauer, Yusheng Dou Treatments of photochemical reactions that employ ``potential energy surfaces'' and are based on the Born-Oppenheimer approximation have various limitations: (i) They typically include only about 2 nuclear degrees of freedom which are postulated to be most important. (ii) They typically put electons into an assumed intial state rather than properly treating the excitation of the molecule. (iii) They typically do not include a proper treatment of the de-excitation of the molecule at avoided crossings near conical intersections. For this reason we have used the complementary technique of semiclassical electron-radiation-ion dynamics (SERID), in which the position operator for each nuclear coordinate is replaced by its expectation value in the Heisenberg equation of motion. One is thus averaging over the various terms in the Born-Oppenheimer expansion of the total wavefunction for nuclei and electrons. Here we review some results which demonstrate the ultity of SERID, and we also discuss how it can be extended to (1) include ionization and (2) treat the time evolution of particular terms in the Born-Oppenheimer expansion, so that its principal limitation is circumvented. [Preview Abstract] |
Friday, March 7, 2008 11:30AM - 11:42AM |
APS1.00006: A Classical Theory of Blackbody Radiation James Espinosa, James Woodyard It has been over one hundred years that Max Planck introduced the concept of the quantum to resolve the blackbody radiation problem, thereby beginning the destruction of Newtonian physics. In most modern physics textbooks, authors mention Lord Rayleigh's failed attempt to apply electromagnetic wave theory, resulting in the famous ultraviolet catastrophe. A few textbooks mention Wien's attempt to explain the blackbody spectrum with a corpuscular model of light and show its close agreement with experiment. We will discuss an almost unknown classical development by Hugh Callendar in 1913 that correctly describes blackbody radiation. This discussion will explore the possible reasons for this Newtonian model being ignored by his contemporaries. [Preview Abstract] |
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