Bulletin of the American Physical Society
Prairie Section Fall 2022 Meeting
Volume 67, Number 12
Thursday–Saturday, October 13–15, 2022; University of South Dakota, Sioux Falls, SD
Session K02: Parallel Session IV |
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Chair: Jason Ho, Dordt University Room: University of South Dakota FADM 162 |
Saturday, October 15, 2022 10:45AM - 10:57AM |
K02.00001: The binding energy and the trapping cross-section of cluster dipole states in a high purity germanium detector operated at cryogenic temperature. Sanjay Bhattarai, Dongming Mei, Rajendra Panth, Wenzhao Wei, Mathbar S Raut We have studied the charge trapping in germanium detectors at 5.2 K and calculated the binding energy of cluster dipole states and the electric field dependent trapping cross section. Two planar detectors, a p-type and a n-type detector are used in this study. Detectors are operated in two different modes: the first method is to deplete the detector at 77k and then decrease temperature to 5.2K and the second method is directly to decrease the detector temperature to 5.2 k and then apply different bias voltages. It is found that the binding energy of cluster dipole states is lower in the second method than in the first method. It indicates the different charge states to begin with in the detector. The binding energy of the trapped charge carriers in cluster dipole states is found in the range of ~5-8 meV. |
Saturday, October 15, 2022 10:57AM - 11:09AM |
K02.00002: Demonstrating a Quantum Permutation Algorithm with Higher Qubit Near-term Intermediate Scale Quantum Processors Ashley Blackwell, Sanjaya Lohani, Amirali Khannejad, Onur Danaci, Manny Gomez, Ryan T Glasser, Brian T Kirby, Thomas A Searles The Quantum Permutation Algorithm (QPA) determines the parity of a cyclic permutation in a single measurement. The original quantum permutation algorithm uses a quantum Fourier transform and its inverse to compute probabilities. This operator seems central to many quantum algorithms; however, Yalcinkaya and Gedik (2017) have shown that substituting simpler transforms for the quantum Fourier transform and its inverse can improve QPA performance. In this presentation, we consider the implementation of this modified QPA algorithm using NISQ machines and measure the impact of the quantum volume on our implementation. We construct circuits using qiskit and implement them on IBM's qasm simulator and a series of NISQ hardware with various qubit orderings. In particular, using both 5- and 7-qubit machines, we implement 2, 3, 4, and 5-qubit permutation circuits and execute each circuit 8192 times to collect statistics. We find that the optimized QPA shows improved performance over previous studies for 3-qubit circuits and higher. Further, we explicitly determine the required quantum volume to realize the QPA effectively for higher dimensional systems. |
Saturday, October 15, 2022 11:09AM - 11:21AM |
K02.00003: Visualizing Spinors in Augmented Reality Timothy D Wiser, Nel Daues Spin-one-half particles have unintuitive transformation properties under changes of coordinates: It takes two full rotations to return a spinor wavefunction to its original value. Here we apply the rapidly evolving techniques of augmented reality to develop a quasi-physical model of a spinor. We describe the connection between augmented reality, quaternions, and spinor transformations, and present a prototype mobile application as a proof-of-concept for future educational use. |
Saturday, October 15, 2022 11:21AM - 11:33AM |
K02.00004: Structural, Magnetic and Electronic Properties of CoFeVGe and related compounds Parashu R Kharel, Zachary Lehmann, Gavin M Baker, Lukas Stuelke, Shah Valloppilly, Paul M Shand, Pavel Lukashev Half-metallic Heusler alloys are of high interest to the material research community due to their potential application in spintronic devices. We have carried out a combined theoretical and experimental investigation of both stoichiometric and nonstoichiometric CoFeVGe alloys, where CoFeVGe, Co1.25Fe0.75VGe, Co0.75Fe1.25VGe, and CoFe0.75VGe bulk alloys have been investigated. Our first principles calculations suggest that all four alloys show ferromagnetic order, where CoFeVGe, Co1.25Fe0.75VGe, and Co0.75Fe1.25VGe are highly spin polarized with spin polarization values of over 80%. However, the spin polarization value of CoFe0.75VGe is only about 60%. We have synthesized all four alloy samples using arc melting and high-vacuum annealing at 600 oC for 48 hours. The room temperature x-ray diffraction of these samples exhibits a cubic crystal structure with disorder. All the samples show single magnetic transitions at their Curie temperatures, where the Curie temperature and high field (3T) magnetization are 288 K and 42 emu/g; 305 K and 1.5 emu/g; 238 K and 39 emu/g; and 306 K and 35 emu/g for CoFeVGe, Co1.25Fe0.75VGe, Co0.75Fe1.25VGe, and CoFe0.75VGe, respectively. The observed magnetic and electronic band properties indicate that the investigated materials have potential for near room temperature magnetic applications desiring low magnetization and high spin polarization. |
Saturday, October 15, 2022 11:33AM - 11:45AM |
K02.00005: Designing a Novel Data Analysis Framework for the MINER Experiment Joseph Mammo Mitchel Institute Neutrino Experiment at Reactor (MINER) is a novel experiment that utilizes kg-scale cryogenic germanium and silicon detectors placed a few meters from a 1 MW research grade nuclear reactor core to look for Coherent Elastic Neutrino Nucleus Scattering (CEvNS). The detectors—designed to be sensitive to the very low energy deposition of CEvNS—are placed very close to the reactor core to maximize neutrino flux. MINER aims to take advantage of the higher neutrino flux rate from the reactor to detect CEvNS and probe for new physics beyond the Standard Model. I will start my talk by briefly describing the MINER experiment. Then, I present my data analysis work along with a new way to improve the chi-square cut used to reject poorly fit events. |
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