Bulletin of the American Physical Society
Fall 2020 Meeting of the APS New England Section
Volume 65, Number 21
Friday–Saturday, November 6–7, 2020; Virtual
Session F01: Contributed: Others |
Hide Abstracts |
Chair: Hashini Mohottala, University of Hartford |
Saturday, November 7, 2020 2:00PM - 2:15PM |
F01.00001: Controlled not connectivity in the Clifford group Reilly Ratcliffe, Oscar Perdomo The Clifford group is the set of gates generated by CZ gates and the two local gates P $=$ \textbraceleft \textbraceleft 1,0\textbraceright ,\textbraceleft 0,i\textbraceright \textbraceright and H, the 2 by 2 Hadamard gate. It is known that, for a two qubit system, the Clifford group C$_{\mathrm{2}}$ is a subgroup of order 92160 of the group of 4 by 4 unitary matrices. It is also known that the local Clifford gates LC$_{\mathrm{2}}$ is a subgroup of order 4608 of the group C$_{\mathrm{2}}$. In order to better understand the set C$_{\mathrm{2}}$, we make two matrices U$_{\mathrm{1}}$ and U$_{\mathrm{2}}$ in C$_{\mathrm{2}}$ equivalent if U$_{\mathrm{1}} \quad =$ V U$_{\mathrm{2}}$ for some V $\in $ LC$_{\mathrm{2}}$. We show that this equivalence relation splits C$_{\mathrm{2}}$ into 20 orbits, O$_{\mathrm{1}}$, . . . ,O$_{\mathrm{20}}$, each with 4608 elements. Moreover, for each orbit O$_{\mathrm{i}}$, CZO$_{\mathrm{i}}$ intersects 9 different orbits O$_{\mathrm{i1}}$, . . . ,O$_{\mathrm{i9}}$ where O$_{\mathrm{ij}}$ does not equal O$_{\mathrm{i}}$ and with CZO$_{\mathrm{i}} \quad \cap $ O$_{\mathrm{ij}}$ containing 512 matrices for each j $=$ 1, 2, . . . , 9. The link \underline {https://www.youtube.com/watch?v}$=$\underline {lcYtB2tnXFw} leads you to a YouTube video that explains the most important results in this paper. [Preview Abstract] |
Saturday, November 7, 2020 2:15PM - 2:30PM |
F01.00002: Dynamics of Bose-Einstein Recondensation in Higher Bands Vaibhav Sharma, Sayan Choudhury, Erich Mueller Motivated by recent experiments, we explore the kinetics of Bose-Einstein condensation in the upper band of a double well optical lattice. These experiments engineer a non-equilibrium situation in which the highest energy state in the band is macroscopically occupied. The system subsequently relaxes and the condensate moves to the lowest energy state. We model this process, finding that the kinetics occurs in three phases: The condensate first evaporates, forming a highly non-equilibrium gas with no phase coherence. Energy is then redistributed among the noncondensed atoms. Finally the atoms recondense. We calculate the time-scales for each of these phases, and explain how this scenario can be verified through future experiments. [Preview Abstract] |
Saturday, November 7, 2020 2:30PM - 2:45PM |
F01.00003: Energy-momentum tensor, D-term and long-range forces: a case study in a classical model of the proton Mira Varma, Peter Schweitzer The prospects of accessing information on the hadronic form factors of the energy-momentum tensor (EMT) have attracted a lot of interest in literature. This concerns especially the D-term form factor D(t) with its appealing interpretation in terms of internal forces. With the focus on hadron structure, so far theoretical and model studies concentrated on strongly interacting systems with short-range forces. Not considered so far were long-range forces like electromagnetic interaction, which is thought to play a negligible role for the balance of forces inside the proton. But the long-range nature of electromagnetic forces introduces features that were not encountered before. We use a case study in a classical model of the proton to show how the presence of long-range forces alters some notions which can be taken for granted in short-range systems. The important conclusion is that a more careful definition of the D-term may be required when long-range forces are present. [Preview Abstract] |
Saturday, November 7, 2020 2:45PM - 3:00PM |
F01.00004: Mathematical Models for Living Forms in Medical Physics Submodel 1: The Information Processing from Teeth to Nerves Christina Pospisil This talk continues the presentation at APS March Meeting 2019 and APS April Meeting 2019. In this part of the project the first submodel is presented. The information processing from teeth to the nerves. Information processing is modeled via p-waves passing through the tooth layers enamel and dentin. Odontoblasts located in the liquid in the tubules of the tooth dentin layer perform finally the transformation into electrical information (an electrical signal) that passes along nerves. The presentation was scheduled for the APS March Meeting 2020 Conference (the APS March Meeting 2020 Conference got canceled because of Covid-19), the presentation was given at the APS April Meeting 2020 Conference. [Preview Abstract] |
Saturday, November 7, 2020 3:00PM - 3:15PM |
F01.00005: The Search for Lightly Ionizing Particles in the LUX Detector Paul Terman The question of the nature of dark matter has become increasingly puzzling as more experiments exclude larger portions of the favored WIMP parameter space. Previous theoretical work has suggested the existence of Lightly Ionizing Particles (LIPs) with charge $e \cdot f$, where $e$ is the electron charge and $f < 1$. At least a part of the dark matter could consist of these LIPs. We seek to utilize data from the first underground WIMP search of the Large Underground Xenon (LUX) experiment, using a dual-phase xenon Time Projection Chamber (TPC), to search for LIPs in the range $f = 0.01$ to $0.3$. To accomplish the aforementioned search new methods of Geant4 based simulation and data processing have been implemented including the first use of pulse $chopping$ for merged signals in a dual-phase TPC and use of secondary pulse classification. [Preview Abstract] |
Saturday, November 7, 2020 3:15PM - 3:30PM |
F01.00006: Study on the Dynamics and Stabilities of DNA Intercalating Agents Using Computer Analysis Richard Kyung, Ethan Han In this paper, a computational gene editing software which is an open-source molecular editing program equipped with an auto-optimization feature was used. In the DNA intercalation, guanine benzopyrene intercalates in the array to form an adduct. The binding causes an alteration of the structure and replication proceeds to gene mutation. To assess the activity, dipole moment was calculated and checked how different values of electronegativity of different atoms in a molecule affect the stability of the system. This difference in electronegativity causes the shared pair of electrons to shift towards one atom, creating a slight difference in charge and activity. Also, electrostatic potential maps were found to show active parts of the molecule. Through this map, users can discover electron density, proton acidity, and how those affect the overall electron density and stability. [Preview Abstract] |
Saturday, November 7, 2020 3:30PM - 3:45PM |
F01.00007: The Propeller Regime of Binary White Dwarf Mergers Asia Haque, Binayyak Roy, Robert Fisher Merging white dwarf binaries are believed to be a possible~channel for the formation of Type Ia supernovae (SNe la). However, if the merger does not promptly result in a SN Ia, observations and theory point towards the production of a high field magnetic white dwarf (HFMWD) during the merger.~When the centrifugal force at the magnetospheric radius dominates the gravitational force, the magnetosphere drives an outflow in the propeller regime. Our work involves the multidimensional magnetohydrodynamical simulation of the propeller regime in~a binary white dwarf merger. We have used Lagrangian passive tracer particles in the astrophysical code framework FLASH 4 to demarcate the boundary of the white dwarf merger and the accretion disk. The analysis of the Lagrangian histories of these particles enables us to determine the mass accretion and mass outflow rates at a level not possible with purely Eulerian data. I conclude with implications for possible observable features of the propeller-driven merger outflows. [Preview Abstract] |
Saturday, November 7, 2020 3:45PM - 4:00PM |
F01.00008: An Idealized Scenario for Energy Generation by Nuclear Fusion David W. Kraft, Issa Dababneh We study nuclear fusion processes in a deuteron plasma under a combination of conditions such that, for a given energy input, a maximum energy output can be attained. Specifically we consider fusion processes initiated by the rapid adiabatic compression by a piston of a deuteron plasma contained in a well-insulated chamber. To exploit the n$^{\mathrm{2}}$ factor in the fusion reaction rate, we consider one mole of plasma which, at ambient temperature and pressure, provides a particle density of $\sim $ 10$^{\mathrm{19}}$ cm$^{\mathrm{-3}}$. Reaction rates are enhanced by the application of magnetic and electric fields to reduce the degrees of freedom of the plasma, thereby lowering its heat capacity and producing a higher temperature increase for a given energy input. Computations show that the combination of adiabatic operation, high particle density and reduced degrees of freedom can result in appreciable fusion rates at temperatures lower than those in magnetic confinement experiments. We consider both primary D-D and secondary D-T reactions. Conditions of energy break-even were found to occur at temperatures of the order of 10$^{\mathrm{6}}$ K. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700