Bulletin of the American Physical Society
2014 Annual Fall Meeting of the APS Ohio-Region Section
Volume 59, Number 13
Friday–Saturday, October 24–25, 2014; Portsmouth, Ohio
Session B1: Quantum and Atomic Physics |
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Chair: James Simmons, Shawnee State University Room: University Center 215 |
Friday, October 24, 2014 1:30PM - 1:42PM |
B1.00001: Quantum Dynamics of Time-Dependent Optomechanical Systems! Amy Kerst, Jean-Francois S. VanHuele, Manuel Berrondo Optomechanical quantum control theory is used in experimental research and various electronic technologies. The ability to construct apparatus on the mesoscopic scale and observe quantum effects has created a need for analytic methods that can accurately predict the time-evolution of these quantum systems. We present such a method, focusing on the time-evolution of driven optical and mechanical oscillators coupled through radiation pressure. We specify the circumstances under which the method yields exact results and propose a mean field theory for when it does not. We explore the behavior of the optomechanical systems as a function of their parameters and the form of the driving forces. [Preview Abstract] |
Friday, October 24, 2014 1:42PM - 1:54PM |
B1.00002: Testing Lorentz and CPT symmetry in Penning traps Yunhua Ding, Alan Kostelecky The Standard Model is phenomenologically successful in explaining particles and the complex nongravitational interactions between them. The CPT theorem, linking Lorentz and CPT symmetry, is a key property of this theory. However, some attempts to unify quantum physics with gravity suggest that tiny departures from Lorentz invariance could arise in nature and produce signals in high-precision experiments. In this talk, a theoretical analysis is performed of Penning-trap experiments confining a single charged particle or its antiparticle. Comparative measurements of cyclotron and anomaly frequencies in the electron-positron system are studied to determine the sensitivity to possible effects from CPT and Lorentz violation. [Preview Abstract] |
(Author Not Attending)
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B1.00003: Optical Switching Using Coherent Perfect Polarization Rotation in a One Dimensional Photonic Crystal Chuanhong Zhou, James Andrews, Michael Crescimanno We report a high efficiency optical switch using coherent perfect polarization rotation effect (CPR) in a one dimensional photonic crystal (PC). The two-port device uses a counter-propagating control beam and is designed such that most light energy is located in the Faraday-active layers, significantly enhancing the polarization rotation and thus decreasing the size of the optical switch. CPR leads to high rotation efficiency in the optical switch due to the absence of reflected light. We show that more than 98{\%} energy can be switched in direction and polarization by simply changing the phase of the control beam. This technique has promising applications in photonic circuits, computation, memory and photonic logic gates. [Preview Abstract] |
Friday, October 24, 2014 2:06PM - 2:18PM |
B1.00004: Lorentz-Violating Electromagnetostatics Joshua Foster, V.A. Kostelecky, Ralf Lehnert The Standard-Model Extension (SME) is a general effective field theory for Lorentz and CPT violation incorporating both the Standard Model and General Relativity. The SME provides a framework for experimental searches for Lorentz violation and for the investigation of new physics. In the static limit of Lorentz-violating electrodynamics, unusual mixing of electrostatic and magnetostatic effects occur. This talk investigates some aspects of Lorentz-violating electromagnetostatics, emphasizing modifications to multipole expansions of conventional electrostatics. [Preview Abstract] |
Friday, October 24, 2014 2:18PM - 2:30PM |
B1.00005: Model Independent Analysis of the Proton Magnetic Radius Joydeep Roy The Proton is a fundamental constituent of matter. In contrast to other fundamental particles like the electron, it is an extended object and has a finite size that can be inferred with some degree of accuracy from several measurements. The electric radius can be extracted from electron-proton scattering experiments,($r_E^p = 0.871\pm 0.009 $ fm) and Lamb shift in Muonic Hydrogen($r_E^p = 0.84184\pm 0.0006 $ fm). The reason of this discrepancy between these values is still unknown and an open issue till date. In the literature there also exist several values of the proton magnetic radius extracted using several model-dependent methods. We use constraints from the analytic behavior of form factors to determine the proton magnetic radius in a model-independent way. Using existing datasets of electron-proton scattering we find $r_M^p = 0.91^{+0.03}_{-0.06}\pm 0.02 $ fm. When we include electron-neutron scattering data and $\pi\pi \rightarrow N\overline{N} $ data, we find $r_M^p = 0.87^{+0.04}_{-0.05}\pm 0.01 $ fm and $r_M^p = 0.87^{+0.02}_{-0.02} $ fm respectively. We also extracted the neutron magnetic radius as $r_M^n = 0.89^{+0.03}_{-0.03} $ fm combining all three datasets. [Preview Abstract] |
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