Asymmetric Localization Of Light By Second-Harmonic Generation,
2022
The University of Texas Rio Grande Valley
Asymmetric Localization Of Light By Second-Harmonic Generation, Hamed Ghaemi-Dizicheh, Amir Targholizadeh, Bao-Feng Feng, Hamidreza Ramezani
Physics & Astronomy Faculty Publications
We introduce a nonlinear photonic system that enables asymmetric localization and unidirectional transfer of an electromagnetic wave through the second-harmonic generation process. Our proposed scattering setup consists of a noncentrosymmetric nonlinear slab with nonlinear susceptibility χ(2) placed to the left side of a one-dimensional periodic linear photonic crystal with an embedded defect. We engineered the linear lattice to allow the localization of a selected frequency 2ω⋆ while frequency ω⋆ is in the gap. Thus in our proposed scattering setup, a left-incident coherent transverse electric wave with frequency ω⋆ partially converts to frequency 2ω⋆ and becomes localized at the defect layer …
Exploring The Effect Of Baryons On The Radial Distribution Of Satellite Galaxies With Gama And Illustristng,
2022
University of Louisville
Exploring The Effect Of Baryons On The Radial Distribution Of Satellite Galaxies With Gama And Illustristng, Stephen D. Riggs, Jon Loveday, Peter A. Thomas, Annalisa Pillepich, Dylan Nelson, Benne W. Holwerda
Faculty and Staff Scholarship
We explore the radial distribution of satellite galaxies in groups in the Galaxy and Mass Assembly (GAMA) survey and the IllustrisTNG simulations. Considering groups with masses 12.0≤log10(Mh/h−1M⊙)<14.8" role="presentation" style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; font-variant: inherit; font-stretch: inherit; line-height: normal; font-family: inherit; vertical-align: baseline; display: inline; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">12.0≤log10(Mh/h−1M⊙)<14.812.0≤log10(Mh/h−1M⊙)<14.8 at z < 0.267, we find a good agreement between GAMA and a sample of TNG300 groups and galaxies designed to match the GAMA selection. Both display a flat profile in the centre of groups, followed by a decline that becomes steeper towards the group edge, and normalized profiles show no dependence on group mass. Using matched satellites from TNG and dark matter-only TNG-Dark runs we investigate the effect of baryons on satellite radial location. At z = 0, we find that the matched subhaloes from the TNG-Dark runs display a much flatter radial profile: namely, satellites selected above a minimum stellar mass exhibit both smaller halocentric distances and longer survival times in the full-physics simulations compared to their dark-matter only analogues. We then divide the TNG satellites into those which possess TNG-Dark counterparts and those which do not, and develop models for the radial positions of …
Resource Estimation For Quantum Simulation Algorithms,
2022
University of New Mexico - Main Campus
Resource Estimation For Quantum Simulation Algorithms, Changhao Yi
Physics & Astronomy ETDs
A major application of quantum computers is simulating other quantum systems that are intractable to simulate classically. The broad family of algorithms for this problem go by the name of quantum simulation. Product formulas provide resource efficient and practical methods to simulate Hamiltonian dynamics. In this thesis, we study the resource estimation of quantum simulation by product formula from two aspects. First, we provide a detailed analysis of the algorithm itself. Using the effective Hamiltonian perspective, we successfully reduce the circuit complexity of quantum phase estimation and digital adiabatic simulation. Second, we analyze the performance of dynamical decoupling, a widely-used …
Surpassing The Standard Quantum Limit Using An Optical Spring,
2022
Louisiana State University and Agricultural and Mechanical College
Surpassing The Standard Quantum Limit Using An Optical Spring, Torrey Cullen
LSU Doctoral Dissertations
In 1916, Albert Einstein predicted the existence of gravitational waves based on his new theory of general relativity. He predicted an accelerating mass with a non-zero quadrupole moment would emit energy in the form of gravitational waves. Often referred to as ripples in space-time, gravitational waves are extremely small by the time reach Earth, potentially having traveled hundreds of megaparsecs. It is common for these ripples in space-time to stretch and squeeze matter 1000 times smaller than the width of a proton.
Laser interferometer observatories were first built in the 1990s in the US and Europe, and as sensitivity improvements …
Search For The Radiative Penguin Decays B0 → Ks0 Ks0 Γ In The Belle Experiment,
2022
Kyungpook National University
Search For The Radiative Penguin Decays B0 → Ks0 Ks0 Γ In The Belle Experiment, H. B. Jeon, K. H. Kang, H. Park, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, F. Bernlochner, M. Bessner, V. Bhardwaj, B. Bhuyan
Faculty and Student Publications
We report results from the first search for the rare penguin-dominated decay mode B0→KS0KS0γ, which can result from the production of tensor mesons f(1270) and f′(1525) in association with a photon. The search uses the full data sample of 772×106 BB¯ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No statistically significant signals are observed in the KS0KS0 invariant mass range 1 GeV/c2
Challenging Predictions Of Inflationary Models With Cmb Data,
2022
Indian Institute of Science Education and Research
Challenging Predictions Of Inflationary Models With Cmb Data, Richik Bhattacharya, Atanu Debnath, Esha Sajjanhar, Shravani Sardeshpande, Pablo Tenorio Hernández, José Ricardo Torres Heredia
2022 REYES Proceedings
Cosmic inflation offers the best known explanations for many of the observed features of the Universe, such as its flatness. An imprint of the qualities of this mechanism is left in the cosmic microwave background (CMB), which can be instrumental to confirm inflation. Unfortunately, there is a plethora of inflationary models, which are a priori in the same footing. It is conceivable that contrasting the predictions of the various models with the measured values of the parameters of CMB data and other cosmological observables shall allow one to single out the successful theory of inflation. In this work we provide …
Search For Z′ →Μ+Μ- In The Lμ-Lτ Gauge-Symmetric Model At Belle,
2022
The University of Tokyo
Search For Z′ →Μ+Μ- In The Lμ-Lτ Gauge-Symmetric Model At Belle, T. Czank, I. Jaegle, A. Ishikawa, I. Adachi, K. Adamczyk, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, F. Bernlochner, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal
Faculty and Student Publications
We search for a new gauge boson Z′ that couples only to heavy leptons and their corresponding neutrinos in the process e+e-→Z′(→μ+μ-)μ+μ-, using a 643 fb-1 data sample collected by the Belle experiment at or near the ϒ(1S,2S,3S,4S,5S) resonances at the KEKB collider. While previous searches for Z′ performed a data-based estimation of the initial state radiation effect, our search for the Z′ is the first to include effects due to initial state radiation in the signal simulated samples that were used in estimating the detection efficiency. No signal is observed in the Z′ mass range of 0.212-10 GeV/c2, and …
B ¯ →D (∗)ℓ X ¯ Decays In Effective Field Theory With Massive Right-Handed Neutrinos,
2022
University of Mississippi
B ¯ →D (∗)ℓ X ¯ Decays In Effective Field Theory With Massive Right-Handed Neutrinos, Alakabha Datta, Hongkai Liu, Danny Marfatia
Faculty and Student Publications
We calculate the complete differential decay distributions for the B meson decays, B¯→D(∗)ℓX¯, to a massive right-handed (RH) neutrino in the low-energy effective field theory (LEFT) framework. We find that a massive RH neutrino does not introduce any new angular structures compared to the massless case, but can cause significant distortions in angular observables. We study the phenomenology of low-energy four-fermion operators permitted by the standard model effective field theory (SMEFT) extended with RH neutrinos (SMNEFT). We show that to explain the positive value of the difference in forward-backward asymmetries, ΔAFBAFBμ-AFBe, tentatively inferred from Belle data, the RH neutrino must …
Transit Timing Variations For Au Microscopii B And C,
2022
Swarthmore College
Transit Timing Variations For Au Microscopii B And C, J. M. Wittrock, S. Dreizler, M. A. Reefe, B. M. Morris, P. P. Plavchan, P. J. Lowrance, B.-O. Demory, J. G. Ingalls, E. A. Gilbert, T. Barclay, B. L. Cale, K. A. Collins, K. I. Collins, I. J. M. Crossfield, D. Dragomir, J. D. Eastman, M. El Mufti, D. Feliz, J. Gagné, E. Gaidos, P. Gao, C. S. Geneser, L. Hebb, C. E. Henze, K. D. Horne, J. M. Jenkins, Eric L.N. Jensen, S. R. Kane, L. Kaye, E. Martioli, T. A. Monsue, E. Pallé, E. V. Quintana, D. J. Radford, V. Roccatagliata, J. E. Schlieder, R. P. Schwarz, A. Shporer, K. G. Stassun, C. Stockdale, T.-G. Tan, A. M. Tanner, A. Vanderburg, L. D. Vega, S. Wang
Physics & Astronomy Faculty Works
We explore the transit timing variations (TTVs) of the young (22 Myr) nearby AU Mic planetary system. For AU Mic b, we introduce three Spitzer (4.5 μm) transits, five TESS transits, 11 LCO transits, one PEST transit, one Brierfield transit, and two transit timing measurements from Rossiter–McLaughlin observations; for AU Mic c, we introduce three TESS transits. We present two independent TTV analyses. First, we use EXOFASTv2 to jointly model the Spitzer and ground-based transits and obtain the midpoint transit times. We then construct an O − C diagram and model the TTVs with Exo-Striker. Second, we reproduce our …
Improved Orbital Constraints And Hα Photometric Monitoring Of The Directly Imaged Protoplanet Analog Hd 142527 B,
2022
Johns Hopkins University
Improved Orbital Constraints And Hα Photometric Monitoring Of The Directly Imaged Protoplanet Analog Hd 142527 B, William O. Balmer, Katherine B. Follette, Laird M. Close, Jared R. Males, Robert J. De Rosa, Jeá I. Adams Redai, Alex Watson, Alycia J. Weinberger, Katie M. Morzinski, Julio Morales, Kimberly Ward-Duong, Laurent Pueyo
Astronomy: Faculty Publications
Companions embedded in the cavities of transitional circumstellar disks have been observed to exhibit excess luminosity at Hα, an indication that they are actively accreting. We report 5 yr (2013-2018) of monitoring of the position and Hα excess luminosity of the embedded, accreting low-mass stellar companion HD 142527 B from the MagAO/VisAO instrument. We use pyklip, a Python implementation of the Karhunen-Loeve Image Processing algorithm, to detect the companion. Using pyklip forward modeling, we constrain the relative astrometry to 1-2 mas precision and achieve sufficient photometric precision (±0.2 mag, 3% error) to detect changes in the Hα contrast of the …
Galactic Component Mapping Of Galaxy Ugc 2885 By Machine Learning Classification,
2022
University of Louisville
Galactic Component Mapping Of Galaxy Ugc 2885 By Machine Learning Classification, Robin J. Kwik, Jinfei Wang, Pauline Barmby, Benne Holwerda
Faculty and Staff Scholarship
Automating classification of galaxy components is important for understanding the formation and evolution of galaxies. Traditionally, only the larger galaxy structures such as the spiral arms, bulge, and disc are classified. Here we use machine learning (ML) pixel-by-pixel classification to automatically classify all galaxy components within digital imagery of massive spiral galaxy UGC 2885. Galaxy components include young stellar population, old stellar population, dust lanes, galaxy center, outer disc, and celestial background. We test three ML models: maximum likelihood classifier (MLC), random forest (RF), and support vector machine (SVM). We use high-resolution Hubble Space Telescope (HST) digital …
Infrared Search For N-Butane And Trans-2-Butene In Titan’S Atmosphere,
2022
Florida Institute of Technology
Infrared Search For N-Butane And Trans-2-Butene In Titan’S Atmosphere, Brendan Steffens
Theses and Dissertations
This dissertation constitutes a study of the possible presence of trace hydrocarbons, namely n-butane (n-C4H10) and trans-2-butene (trans-2-C4H8) in Titan’s atmosphere. These molecules, both of which bear specific connections of interest to Titan’s astrobiological potential, are predicted by photochemical models to occur at detectable abundances within Titan’s atmosphere. In spite of this, neither has been detected to date, by any means. For this work, both of these molecules were characterized in the laboratory by obtaining a comprehensive set of highresolution, infrared cross section measurements at cold temperatures appropriate for Titan. In the case of n-butane, a pseudoline list (i.e. an …
Climatology Of Deep O+ Dropouts In The Night-Time F-Region In Solar Minimum Measured By A Langmuir Probe Onboard The International Space Station,
2022
Embry-Riddle Aeronautical University
Climatology Of Deep O+ Dropouts In The Night-Time F-Region In Solar Minimum Measured By A Langmuir Probe Onboard The International Space Station, Shantanab Debchoudhury, Aroh Barjatya, Joseh I. Minow, Victoria N. Coffey, Linda N. Parker
Publications
The Floating Potential Measurement Unit (FPMU) onboard the International Space Station includes a Wide sweeping Langmuir Probe (WLP) that has been operating in the F-region of the ionosphere at ∼400 km since 2006. While traditional Langmuir probe estimates include critical plasma parameters like electron density and temperature, we have also extracted the O+ percentage from the total ion constituents. This O+ composition dataset from the recent minimum in the Solar Cycle 24 reveals orbits with dropouts in O+ to below 80% of the total background ion density at ISS orbital altitudes. The observed O+ percentages during these dropouts are much …
Beyond The Local Volume. Ii. Population Scaleheights And Ages Of Ultracool Dwarfs In Deep Hst/Wfc3 Parallel Fields,
2022
University of Louisville
Beyond The Local Volume. Ii. Population Scaleheights And Ages Of Ultracool Dwarfs In Deep Hst/Wfc3 Parallel Fields, Christian Aganze, Adam J. Burgasser, Mathew Malkan, Christopher A. Theissen, Roberto A. Tejada Arevalo, Chih-Chun Hsu, Daniella C. Bardalez Gagliuffi, Russell E. Ryan Jr., Benne Holwerda
Faculty and Staff Scholarship
Ultracool dwarfs (UCDs) represent a significant proportion of stars in the Milky Way, and deep samples of these sources have the potential to constrain the formation history and evolution of low-mass objects in the Galaxy. Until recently, spectral samples have been limited to the local volume (d < 100 pc). Here, we analyze a sample of 164 spectroscopically characterized UCDs identified by Aganze et al. in the Hubble Space Telescope (HST) WFC3 Infrared Spectroscopic Parallel Survey (WISPS) and 3D-HST. We model the observed luminosity function using population simulations to place constraints on scaleheights, vertical velocity dispersions, and population ages as a function of spectral type. Our star counts are consistent with a power-law mass function and constant star formation history for UCDs, with vertical scaleheights of 249 pc for late-M dwarfs, 153 pc for L dwarfs, and 175 pc for T dwarfs. Using spatial and velocity dispersion relations, these scaleheights correspond to disk population ages of 3.6 Gyr for late-M dwarfs, 2.1 Gyr for L dwarfs, and 2.4 Gyr for T dwarfs, which are consistent with prior simulations that predict that L-type dwarfs are on average a younger and less dispersed population. There is an additional 1–2 Gyr systematic uncertainty on these ages due to variances in age-velocity relations. We use our population simulations to predict the UCD yield in the James Webb Space Telescope PASSAGES survey, a similar and deeper survey to WISPS and 3D-HST, and find that it will produce a comparably sized UCD sample, albeit dominated by thick disk and halo sources.
Coexistence Of Extended And Localized States In The One-Dimensional Non-Hermitian Anderson Model,
2022
The University of Texas Rio Grande Valley
Coexistence Of Extended And Localized States In The One-Dimensional Non-Hermitian Anderson Model, Cem Yuce, Hamidreza Ramezani
Physics & Astronomy Faculty Publications
In one-dimensional Hermitian tight-binding models, mobility edges separating extended and localized states can appear in the presence of properly engineered quasiperiodical potentials and coupling constants. On the other hand, mobility edges do not exist in a one-dimensional Anderson lattice since localization occurs whenever a diagonal disorder through random numbers is introduced. Here we consider a nonreciprocal non-Hermitian lattice and show that the coexistence of extended and localized states appears with or without diagonal disorder in the topologically nontrivial region. We discuss that the mobility edges appear basically due to the boundary condition sensitivity of the nonreciprocal non-Hermitian lattice.
Table Of Contents,
2022
University of South Carolina
Table Of Contents
Journal of the South Carolina Academy of Science
No abstract provided.
Staerkel Planetarium Marking 35 Years Of Projecting The Stars,
2022
Parkland College
Staerkel Planetarium Marking 35 Years Of Projecting The Stars, Erik Johnson
Natural Science Faculty
Visitors to the Staerkel Planetarium are introduced to "Carl" when they walk in the dome. Some people mistake Carl for a telescope in an observatory, but Carl puts "stars" on the dome instead of collecting light from stars. "Carl" is the Carl Zeiss Model M 1015-star projector, an intricate piece of machinery that has been at Parkland College since the planetarium opened 35 years ago.
Complex Energies And The Lambert W Function,
2022
University of Western Ontario
Complex Energies And The Lambert W Function, A Das, B.G. Sidharth, K. Roberts, Sree Ram Valluri
Physics and Astronomy Publications
We apply the Lambert W function in the context of complex energy values in statistical systems of fermions and bosons. We derive the condition for the transformation connecting fermions and bosons. We discuss the physical significance of these results and investigate the conditions under which bosonization effects take place. The fermion and boson statistical and structural distributions discussed in this work suggest the possibility of their extensions to generalized Planck distributions.
Search For Multimessenger Signals In Nova Coincident With Ligo/Virgo Detections,
2022
University of South Carolina
Search For Multimessenger Signals In Nova Coincident With Ligo/Virgo Detections, M. A. Acero, P. Adamson, L. Aliaga, T. Alion, V. Alakhberdian, N. Anfimov, A. Antoshkin, L. Asquith, A. Aurisano, A. Back, C. Backhouse, M. Biard, N. Balashov, P. Baldi, B. A. Bambah, S. Bashar, K. Bays, S. Bending, R. Bernstein, V. Bhatnagar, Roberto Petti, Et. Al.
Faculty Publications
Using the NOvA neutrino detectors, a broad search has been performed for any signal coincident with 28 gravitational wave events detected by the LIGO/Virgo Collaboration between September 2015 and July 2019. For all of these events, NOvA is sensitive to possible arrival of neutrinos and cosmic rays of GeV and higher energies. For five (seven) events in the NOvA Far (Near) Detector, timely public alerts from the LIGO/Virgo Collaboration allowed recording of MeV-scale events. No signal candidates were found.
Narrowband Searches For Continuous And Long-Duration Transient Gravitational Waves From Known Pulsars In The Ligo-Virgo Third Observing Run,
2022
The University of Texas Rio Grande Valley
Narrowband Searches For Continuous And Long-Duration Transient Gravitational Waves From Known Pulsars In The Ligo-Virgo Third Observing Run, R. Abbott, T. D. Abbott, F. Acernese, K. Ackley, Teviet Creighton, Mario C. Diaz, Francisco Llamas, Soma Mukherjee, Volker Quetschke, Wenhui Wang
Physics & Astronomy Faculty Publications
Isolated neutron stars that are asymmetric with respect to their spin axis are possible sources of detectable continuous gravitational waves. This paper presents a fully coherent search for such signals from eighteen pulsars in data from LIGO and Virgo's third observing run (O3). For known pulsars, efficient and sensitive matched-filter searches can be carried out if one assumes the gravitational radiation is phase-locked to the electromagnetic emission. In the search presented here, we relax this assumption and allow both the frequency and the time derivative of the frequency of the gravitational waves to vary in a small range around those …
