Bulletin of the American Physical Society
2013 Annual Fall Meeting of the APS Ohio-Region Section
Volume 58, Number 9
Friday–Saturday, October 4–5, 2013; Cincinnati, Ohio
Session E4: Applied, AMO, Nuclear, Quantum Computing |
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Room: Braunstein Hall 316 |
Saturday, October 5, 2013 8:00AM - 8:12AM |
E4.00001: Spontaneous Movement of Water Droplets on Copper and Aluminum Surfaces Using Surface Tension Gradients Muidh Alheshibri, Nathaniel Rogers, Khalid Eid, Andrew Sommers We report a simple technique to move water droplets on hydrophobic Cu surfaces containing a hydrophilic Al background. A surface tension gradient due to a wedge shape creates a significant net driving force which moves the droplets towards the end of the wedge that contains more Al surface area. Droplet motion has been observed on both horizontal surfaces and surfaces oriented vertically against gravity. It was found that the speed depends on the head angle of the triangle and the contact angles of the droplet on the Al and Cu regions. Furthermore, the effect of the surface patterning and oxidation of the metal on water droplet behavior has also been studied. \\[4pt] Reference: \\[0pt] M.H. Alheshibri et al. \textit{Appl. Phys. Lett. }\textbf{102}, 174103 (2013) [Preview Abstract] |
Saturday, October 5, 2013 8:12AM - 8:24AM |
E4.00002: Optical wave evolution in nano-structured plastic films Michael Baker, Michael Crescimanno To model the transport of light through a microlens made out of microlayered film from the NSF Science and Technology Center for Layered Polymeric Systems (Case Western Reserve University, lead institution), we employ the transfer matrix method to determine the amplitude of the transmitted wave at each layer of the film. The results highlight the profound dispersive effects in and around the reflection band. [Preview Abstract] |
Saturday, October 5, 2013 8:24AM - 8:36AM |
E4.00003: Theoretical evaluation of layered microlens optics Michael Crescimanno, Michael Baker We combine basic physical optics theory with the transfer matrix analysis of optical transport in microlayered plastics to address subtleties in the chromatic response of microlenses made from these materials. In particular this method explains the len's behavior in and around the reflection band of the material. [Preview Abstract] |
Saturday, October 5, 2013 8:36AM - 8:48AM |
E4.00004: Photoluminescence Excitation studies of Coupled Quantum Dots under simultaneous Resonant and Non-Resonant Excitation Ramana Thota, Eric Stinaff, Allan Bracker, Daniel Gammon In this report we used two photon optical excitation studies to investigate the charge states of various excitons found in the optical spectra of coupled In$_{\mathrm{1-x}}$Ga$_{\mathrm{x}}$As quantum dots (CQDs) grown by molecular beam epitaxy, This experiment is performed by using micro-photoluminescence excitation technique, where we keep the excitation energy of one laser fixed at the energy of wetting layer (non resonant excitation) and tuning the excitation energy of the other laser through the states of quantum dot (resonant excitation). This study may help identifying enhanced states of various charge excitons, which are possibly useful for generating on demand entangle photon pairs with CQDs. [Preview Abstract] |
Saturday, October 5, 2013 8:48AM - 9:00AM |
E4.00005: Chopper Optimization for NPDGamma Experiment Md Latiful Kabir, Christopher Crawford The NPDGamma experiment at the spallation neutron source is set up to probe the hadronic weak interaction by measuring parity-violating gamma ray asymmetry in the capture of polarized cold neutrons on protons. In the experiment choppers are used, for example, to allow neutrons of desired wave length, maximize spin flipper efficiency, remove wraparound and minimize depolarization. Then it becomes a challenge to ensure high neutron flux but fulfilling all the above requirements. To address the issue we came up with a model spectrum using an analytical chopper which enables us to optimize the choppers by varying chopper location, opening angle and opening phase to get desired neutron flux. [Preview Abstract] |
Saturday, October 5, 2013 9:00AM - 9:12AM |
E4.00006: Physics of string of information at high speeds, time complexity and time dilation Ahmad Reza Estakhr In computer science, the time complexity of an algorithm quantifies the amount of time taken by an algorithm to run as a function of the length of the string representing the input (1). According to Time dilation, two working clocks (one of them work natural and the other one work at speed of string) will report different times after different speeds. time of the clock that work at speed of string $v_s$ is called proper time and its relation to natural time is $d\tau_s = dt\gamma^{-1}$ where the $\gamma$ is Lorentz factor $\gamma=\frac {1}{\sqrt{1-\frac {v_s^2}{c^2}}}$ , and where the speed of string is speed of light $d\tau_=0$, that which means there is no Time complexity from string viewpoint at speed of light, even in the worst-case time complexity. ref: 1. Sipser, Michael (2006). Introduction to the Theory of Computation. Course Technology Inc. ISBN 0-619-21764-2 [Preview Abstract] |
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