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Biology And Management Of The Rice Stink Bug (Hemiptera: Pentatomidae) In Rice, Oryza Sativa (Poales: Poaceae), Santhi Bhavanam, Blake Wilson, Bryce Blackman, Michael Stout Jan 2021

Biology And Management Of The Rice Stink Bug (Hemiptera: Pentatomidae) In Rice, Oryza Sativa (Poales: Poaceae), Santhi Bhavanam, Blake Wilson, Bryce Blackman, Michael Stout

Faculty Publications

The rice stink bug, Oebalus pugnax (Fabricius), is the most important late-season insect pest of rice in the southern United States. Nymphs and adults feed on rice grains, resulting in losses in yield and grain quality. Aspects of the biology, ecology, life history, and chemical ecology have been investigated in southern rice producing states but several outstanding questions remain. Standard economic threshold levels (ETLs) based on sweep net sampling for rice stink bug have been established depending on grain development stage and geographic location. However, recent studies on the relationship between rice stink bug densities, feeding damage, and its economic …

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Pest Management Needs And Limitations For Corn Earworm (Lepidoptera: Noctuidae), An Emergent Key Pest Of Hemp In The United States, Kadie E. Britt, Thomas P. Kuhar, Whitney Cranshaw, Christopher T. Mccullough, Sally V. Taylor, Benjamin R. Arends, Hannah Burrack, Melissa Pulkoski, David Owens, Tigist A. Tolosa, Simon Zebelo, Katelyn A. Kesheimer, Olufemi S. Ajayi, Michelle Samuel-Foo, Jeffrey A. Davis, Nathan Arey, Hélène Doughty, Joanne Jones, Marguerite Bolt, Bradley J. Fritz, Jerome F. Grant, Julian Cosner, Melissa Schreiner Jan 2021

Pest Management Needs And Limitations For Corn Earworm (Lepidoptera: Noctuidae), An Emergent Key Pest Of Hemp In The United States, Kadie E. Britt, Thomas P. Kuhar, Whitney Cranshaw, Christopher T. Mccullough, Sally V. Taylor, Benjamin R. Arends, Hannah Burrack, Melissa Pulkoski, David Owens, Tigist A. Tolosa, Simon Zebelo, Katelyn A. Kesheimer, Olufemi S. Ajayi, Michelle Samuel-Foo, Jeffrey A. Davis, Nathan Arey, Hélène Doughty, Joanne Jones, Marguerite Bolt, Bradley J. Fritz, Jerome F. Grant, Julian Cosner, Melissa Schreiner

Faculty Publications

Corn earworm, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae), has emerged as an injurious insect pest to hemp, Cannabis sativa L., a crop newly reintroduced to the United States. Growing hemp presents a potential alternative economic opportunity for farmers but can be challenging with a market that is unstable and just developing. One of the most notable production challenges is managing corn earworm, an insect pest that is particularly damaging when it feeds on flower buds produced in cannabinoid varieties, creating extensive bud tunneling and wounds that allow entry of pathogens that can aid development and presence of bud rot. Damage to …

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Identification And Biology Of Common Caterpillars In U.S. Soybean, Erin W. Hodgson, Robert L. Koch, Jeffrey A. Davis, Dominic Reisig, Silvana V. Paula-Moraes Jan 2021

Identification And Biology Of Common Caterpillars In U.S. Soybean, Erin W. Hodgson, Robert L. Koch, Jeffrey A. Davis, Dominic Reisig, Silvana V. Paula-Moraes

Faculty Publications

Soybean is an established crop with a high production value in the United States. The insects that utilize soybean as a food source have changed drastically over the last 20 yr. Much of the extension literature summarizing pest species distribution and abundance is out of date. This article provides profiles for five common soybean caterpillars, including description, life cycle, and injury to plants.

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Current Distribution And Population Persistence Of Five Lepidopteran Pests In U.S. Soybean, Anders S. Huseth, Robert L. Koch, Dominic Reisig, Jeffrey A. Davis, Silvana V. Paula-Moraes, Erin W. Hodgson Jan 2021

Current Distribution And Population Persistence Of Five Lepidopteran Pests In U.S. Soybean, Anders S. Huseth, Robert L. Koch, Dominic Reisig, Jeffrey A. Davis, Silvana V. Paula-Moraes, Erin W. Hodgson

Faculty Publications

The distribution of lepidopteran pests in soybean (Glycine max (L.) Merr.) is a current knowledge gap limiting accurate prioritization of Integrated Pest Management (IPM) research. Regional characterizations of lepidopteran distribution in soybean are now more than 25 yr old. The goal of this study was to generate a contemporary assessment of the distribution and population persistence of lepidopteran soybean pests. To understand which species are currently infesting soybean and their persistence, we conducted a survey of soybean entomologists with responsibility for approximately 33.6 million hectares of production in 31 U.S. states. Soybean entomologists were asked questions about presence of lepidopteran …

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Climate Mismatch Between Introduced Biological Control Agents And Their Invasive Host Plants: Improving Biological Control Of Tropical Weeds In Temperate Regions, Nathan E. Harms, Ian A. Knight, Paul D. Pratt, Angelica M. Reddy, Abhishek Mukherjee, Ping Gong, Julie Coetzee, S. Raghu, Rodrigo Diaz Jan 2021

Climate Mismatch Between Introduced Biological Control Agents And Their Invasive Host Plants: Improving Biological Control Of Tropical Weeds In Temperate Regions, Nathan E. Harms, Ian A. Knight, Paul D. Pratt, Angelica M. Reddy, Abhishek Mukherjee, Ping Gong, Julie Coetzee, S. Raghu, Rodrigo Diaz

Faculty Publications

Many weed biological control programs suffer from large-scale spatial variation in success due to restricted distributions or abundances of agents in temperate climates. For some of the world’s worst aquatic weeds, agents are established but overwintering conditions limit their survival in higher latitudes or elevations. The resulting need is for new or improved site-or region-specific biological control tools. Here, we review this challenge with a focus on low-temperature limitations of agents and propose a roadmap for improving success. Investigations across spatial scales, from global (e.g., foreign exploration), to local (selective breeding), to individual organisms (molecular modification), are discussed. A combination …

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Revision Of The Genus Schoenlandella (Hymenoptera, Braconidae, Cardiochilinae) In The New World, With A Potential Biological Control Agent For A Lepidopteran Pest Of Bitter Gourd (Momordica Charantia L.), Ilgoo Kang, Michael J. Sharkey, Rodrigo Diaz Jan 2021

Revision Of The Genus Schoenlandella (Hymenoptera, Braconidae, Cardiochilinae) In The New World, With A Potential Biological Control Agent For A Lepidopteran Pest Of Bitter Gourd (Momordica Charantia L.), Ilgoo Kang, Michael J. Sharkey, Rodrigo Diaz

Faculty Publications

Schoenlandella Cameron, 1905 is the second largest genus of Cardiochilinae. Most members are recorded from the Old World, with a small number of species in the New World. Herein, the New World species of Schoenlandella are revised based on morphological data. This work entails a description of a new species: S. montserratensis Kang, sp. nov. and potential lepidopteran host information of the new species associated with bitter gourds on the Caribbean Island of Montserrat. Schoenlandella diaphaniae (Marsh, 1986) and S. gloriosa Mercado & Wharton, 2003 are re-described, and a key to species of New World Schoenlandella is provided. The taxonomic …

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Host Genotype And Tissue Type Determine Dwv Infection Intensity, Hannah J. Penn, Michael Simone-Finstrom, Sarah Lang, Judy Chen, Kristen Healy Jan 2021

Host Genotype And Tissue Type Determine Dwv Infection Intensity, Hannah J. Penn, Michael Simone-Finstrom, Sarah Lang, Judy Chen, Kristen Healy

Faculty Publications

Varroa mite-vectored viruses such as Deformed wing virus (DWV) are of great concern for honey bee health as they can cause disease in individuals and increase colony mortality. Two genotypes of DWV (A and B) are prevalent in the United States and may have differential virulence and pathogenicity. Honey bee genetic stocks bred to resist Varroa mites also exhibit differential infection responses to the Varroa mite-vectored viruses. The goal of this project was to determine if interactions between host genotype could influence the overall infection levels and dissemination of DWV within honey bees. To do this, we injected DWV isolated …

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“An Emergency Job Well Done”: Friends Of Freedom Libraries And The Mississippi Freedom Libraries, Suzanne Marie Stauffer Jan 2021

“An Emergency Job Well Done”: Friends Of Freedom Libraries And The Mississippi Freedom Libraries, Suzanne Marie Stauffer

Faculty Publications

No abstract provided.

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An Assessment Of The Relationship Between Sweetener Prices And High Fructose Corn Syrup Deliveries In The United States, P. Lynn Kennedy, Pablo A. Garcia-Fuentes, Gustavo F.C. Ferreira Jan 2021

An Assessment Of The Relationship Between Sweetener Prices And High Fructose Corn Syrup Deliveries In The United States, P. Lynn Kennedy, Pablo A. Garcia-Fuentes, Gustavo F.C. Ferreira

Faculty Publications

This paper uses an application of the Bertrand model to explain the relationship between HFCS deliveries and the prices of HFCS-42 and sugar. It finds that the HFCS deliveries and the prices of HFCS-42 and refined sugar are cointegrated over the period 1994:q1-2020:q1. The main results, based on the estimated long-run elasticities, show that a one percent increase in the price of HFCS-42 decreases HFCS deliveries by 0.153 percent. One implication of this result is that it would be helpful for the HFCS industry to prevent large increases in the HFCS price, which would prevent large decreases in HFCS deliveries …

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Sugar Recovery Rates In Louisiana, Florida, And Australia (1901–2018): Sugarcane Varietal Development And Cultural Practices, P. Lynn Kennedy, Andrew Schmitz, Fangyi Zhang Jan 2021

Sugar Recovery Rates In Louisiana, Florida, And Australia (1901–2018): Sugarcane Varietal Development And Cultural Practices, P. Lynn Kennedy, Andrew Schmitz, Fangyi Zhang

Faculty Publications

Australia, Florida, and Louisiana are dominant sugar producers. We use piecewise regression to compare the growth in sugar recovery rates. To discuss sugarcane (Saccharum officinarum L.) varietal development and cultural practices, we consider two scenarios: the entire period 1901 to 2018 and two subperiods using country-specific breakpoints. The overall annual increase in the sugar recovery rate for all three regions ranged between 0.0180% for Australia and 0.0525% for Florida. In the first subperiod, Florida (0.2380%, 1928–1941) and Australia (0.1233%, 1901–1927) have the greatest annual gains, but in the second subperiod, Louisiana experiences the greatest annual gains (0.0813%, 1969–2018), followed by …

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Kentucky Soybean Farmers' Supportiveness Of Two Integrated Pest And Pollinator Management Tactics, Hannah J. Penn, Jerrod Penn, Michael Cunningham-Minnick, Wuyang Hu Jan 2021

Kentucky Soybean Farmers' Supportiveness Of Two Integrated Pest And Pollinator Management Tactics, Hannah J. Penn, Jerrod Penn, Michael Cunningham-Minnick, Wuyang Hu

Faculty Publications

Beneficial insect conservation in agriculture is often studied in the context of integrated pest management (IPM). For instance, vegetative field edges provide habitat and changing the timing of insecticidal sprays decreases risk for pollinators and natural enemies of insect pests. However, the attitudes and confidence of U.S. growers towards IPM implementation in traditional row crops remain understudied. We developed an online survey using a convenience sample and surveyed Kentucky soybean growers to understand their current pest and general management practices, beliefs about sources of insect pests/weeds, and attitudes towards pollinators. We also asked about their willingness to implement two management …

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Populations Of Helicoverpa Zea (Boddie) In The Southeastern United States Are Commonly Resistant To Cry1ab, But Still Susceptible To Vip3aa20 Expressed In Mir 162 Corn, Ying Niu, Isaac Oyediran, Wenbo Yu, Shucong Lin, Marcelo Dimase, Sebe Brown, Francis P.F. Reay-Jones, Don Cook, Dominic Reisig, Ben Thrash, Xinzhi Ni, Silvana V. Paula-Moraes, Yan Zhang, Jeng Shong Chen, Zhimou Wen, Fangneng Huang Jan 2021

Populations Of Helicoverpa Zea (Boddie) In The Southeastern United States Are Commonly Resistant To Cry1ab, But Still Susceptible To Vip3aa20 Expressed In Mir 162 Corn, Ying Niu, Isaac Oyediran, Wenbo Yu, Shucong Lin, Marcelo Dimase, Sebe Brown, Francis P.F. Reay-Jones, Don Cook, Dominic Reisig, Ben Thrash, Xinzhi Ni, Silvana V. Paula-Moraes, Yan Zhang, Jeng Shong Chen, Zhimou Wen, Fangneng Huang

Faculty Publications

AbstractsThe corn earworm, Helicoverpa zea (Boddie), is a major pest targeted by pyramided Bacillus thuringiensis (Bt) corn and cotton in the U.S. Cry1Ab is one of the first insecticidal toxins used in Bt crops, while Vip3A is a relatively new toxin that has recently been incorporated into Cry corn with event MIR 162 and Cry cotton varieties to generate pyramided Bt traits targeting lepidopteran pests including H. zea. The objectives of this study were to determine the current status and distribution of the Cry1Ab resistance, and evaluate the susceptibility to Vip3Aa20 expressed in MIR 162 corn in H. zea in …

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Dominance And Fitness Costs Of Insect Resistance To Genetically Modified Bacillus Thuringiensis Crops, Fangneng Huang Jan 2021

Dominance And Fitness Costs Of Insect Resistance To Genetically Modified Bacillus Thuringiensis Crops, Fangneng Huang

Faculty Publications

Evolution of resistance to genetically modified Bacillus thuringiensis (Bt) crops in pest populations is a major threat to the sustainability of the technology. Incidents of field resistance that have led to control problems of Bt crops or significantly reduced susceptibility of individual Bt proteins in pyramided plants have increased dramatically across the world, especially in recent years. Analysis of globally published data showed that 61.5% and 60.0% of the cases of resistance with major alleles that allowed homozygous resistant genotypes to survival on Bt crops were functionally non-recessive and did not involve fitness costs, respectively. Dominance levels (DFLs) measured on …

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Biology, Ecology, And Management Of Key Sorghum Insect Pests, Olabimpe O. Okosun, Kerry C. Allen, James P. Glover, Gadi V.P. Reddy Jan 2021

Biology, Ecology, And Management Of Key Sorghum Insect Pests, Olabimpe O. Okosun, Kerry C. Allen, James P. Glover, Gadi V.P. Reddy

Faculty Publications

Sorghum, Sorghum bicolor L. Moench (Poaceae), is a highly valued crop cultivated worldwide, with the grain and stover being of equal importance in some developing countries. Sorghum can produce high yields even under adverse environmental conditions, however, damage from insect pests at various stages of the plant's development can reduce its productivity, impacting low-income farmers in developing countries. Important sorghum insect pests include leaf-sucking species, leaf-feeding species, stalk or stem borers, pests of the panicle and of the stored grain. Modern control strategies include cultural controls, biological control, pesticides (chemical, botanicals, or microbial), and host plant resistance. An integrated approach …

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First Record Of Native Entomopathogenic Nematodes From Montana Agroecosystems, Ramandeep K. Sandhi, Ratnasri Pothula, Satyendra K. Pothula, Byron J. Adams, Gadi V.P. Reddy Jan 2021

First Record Of Native Entomopathogenic Nematodes From Montana Agroecosystems, Ramandeep K. Sandhi, Ratnasri Pothula, Satyendra K. Pothula, Byron J. Adams, Gadi V.P. Reddy

Faculty Publications

A total of 30 different agricultural fields in the Golden Triangle Region of Montana, USA were surveyed, and 150 soil samples were evaluated for the presence of entomopathogenic nematodes (EPNs). The authors isolated EPNs from 10% of the collected samples. The recovered isolates were identified as Steinernema feltiae and Heterorhabditis bacteriophora by using morphological and molecular analysis. Steinernema feltiae was found from two fields, Kalispell (S. feltiae 1) and Choteau (S. feltiae 2). Steinernema feltiae (1 and 2) differed significantly from each other in terms of morphological characters for infective juveniles (distance from anterior end to excretory pore and nerve …

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Biology, Ecology, And Management Strategies For Pea Aphid (Hemiptera: Aphididae) In Pulse Crops, Ramandeep Kaur Sandhi, Gadi V.P. Reddy Jan 2021

Biology, Ecology, And Management Strategies For Pea Aphid (Hemiptera: Aphididae) In Pulse Crops, Ramandeep Kaur Sandhi, Gadi V.P. Reddy

Faculty Publications

Pea aphid, Acyrthospihon pisum (Harris) (Hemiptera: Aphididae), is one of the key pests of pulse crops worldwide. The aphid has a broad host range, infesting crops such as faba bean, lupin, alfalfa, lentil, chickpea, grass pea, and pea. This broad host range with a complex life cycle and ability to quickly adapt to new environmental conditions make it difficult to control this pest. Different studies focusing on the biology, ecology, and management practices of A. pisum, along with case studies conducted on different integrated pest management strategies such as host plant resistance, cultural, genetic, biological, and chemical control are reviewed …

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On-Farm Evaluation Of Regenerative Land-Use Practices In A Semi-Arid Pasture Agroecosystem In West Texas, Usa, Lindsey Slaughter, Sanjit Deb, Somsubhra Chakraborty, Bin Li, Noura Bakr, Bryanna Edwards, David Weindorf Jan 2021

On-Farm Evaluation Of Regenerative Land-Use Practices In A Semi-Arid Pasture Agroecosystem In West Texas, Usa, Lindsey Slaughter, Sanjit Deb, Somsubhra Chakraborty, Bin Li, Noura Bakr, Bryanna Edwards, David Weindorf

Faculty Publications

Continually rising scarcity in water and nutrient resources, especially in semi-arid agricultural systems, combined with increased frequency of extreme weather events such as drought, contribute to a growing need for resilient and regenerative agricultural ecosystems. However, evaluating a myriad of combinations of producer-led sustainable management practices in on-farm research remains challenging. Few studies have elucidated spatial variability in measured soil properties across the study area due to logistical and economic constraints. As such, this study aimed to: 1) establish soil health assessment and landscape variability data immediately after land-use change to a sustainable pasture management system, and 2) delineate relationships …

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A Multivariate Multiple Third-Variable Effect Analysis With An Application To Explore Racial And Ethnic Disparities In Obesity, Qingzhao Yu, Bin Li Jan 2021

A Multivariate Multiple Third-Variable Effect Analysis With An Application To Explore Racial And Ethnic Disparities In Obesity, Qingzhao Yu, Bin Li

Faculty Publications

Third-Variable effect refers to the intervening effect from a third variable (called mediators or confounders) to the observed relationship between an exposure and an outcome. The general multiple third-variable effect analysis method (TVEA) allows consideration of multiple mediators/confounders (MC) simultaneously and the use of linear and nonlinear predictive models for estimating MC effects. Previous studies have found that compared with non-Hispanic White population, Blacks and Hispanic Whites suffered disproportionally more with obesity and related chronic diseases. In this paper, we extend the general TVEA to deal with multivariate/multi-categorical predictors and multivariate response variables. We designed algorithms and an R package …

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Characterization Of Swine Behavior And Production Using Measurements Collected Via Indoor Positioning System, Shaun Perisho, Alen Hajnal Jan 2021

Characterization Of Swine Behavior And Production Using Measurements Collected Via Indoor Positioning System, Shaun Perisho, Alen Hajnal

Faculty Publications

© 2020 Legislative and market initiatives are requiring that gestating sows move from individual housing to group settings. Little information is known about coping of individual sows in these more socially complex environments and thus the impact of different behaviors on sow reproductive success was investigated. The movements of 70 sows during periods of reintroduction into large pen gestational housing following insemination was measured using Smartbow indoor positioning technology (Smartbow, Smartbow GmbH, Weibern, Austria) that tracked animal location and accelerations. Principle component analysis (PCA) was used to establish composite variables characterizing each animal's behavioral response to social reintroduction and revealed …

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Systematics Of A Neotropical Clade Of Dead-Leaf-Foraging Antwrens (Aves: Thamnophilidae; Epinecrophylla), Oscar Johnson, Jeffrey T. Howard, Robb T. Brumfield Jan 2021

Systematics Of A Neotropical Clade Of Dead-Leaf-Foraging Antwrens (Aves: Thamnophilidae; Epinecrophylla), Oscar Johnson, Jeffrey T. Howard, Robb T. Brumfield

Faculty Publications

© 2020 Elsevier Inc. The stipple-throated antwrens of the genus Epinecrophylla (Aves: Thamnophilidae) are represented by eight species primarily found in the lowlands of the Amazon Basin and the Guiana Shield. The genus has a long and convoluted taxonomic history, with many attempts made to address the taxonomy and systematics of the group. Here we employ massively parallel sequencing of thousands of ultraconserved elements (UCEs) to provide both the most comprehensive subspecies-level phylogeny of Epinecrophylla antwrens and the first population-level genetic analyses for most species in the genus. Most of our results are robust to a diversity of phylogenetic and …

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When Your Partner Cheats: Financial Infidelity In Committed Couples, Michael D. Mong, Hans Stadthagen-Gonzalez, Kenji Noguchi, Michelle M. Jeanfreau Jan 2021

When Your Partner Cheats: Financial Infidelity In Committed Couples, Michael D. Mong, Hans Stadthagen-Gonzalez, Kenji Noguchi, Michelle M. Jeanfreau

Faculty Publications

The present study evaluated the affective, behavioral, and cognitive responses of 203 participants who were queried about their romantic partners’ potential financial infidelity as well as their own. Results were analyzed through the lens of the ABC model (affect, behavior, cognition) and indicated that participants would be much more upset and less accepting if their romantic partner: filed for bankruptcy without their partner’s knowledge, gambled away money without telling their partner, lied to cover up a debt, kept a secret account, took out savings without consulting their partner, spent money on pornographic material without telling their partners, hid credit card …

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Review Of The Night Always Comes, Michael F. Russo Jan 2021

Review Of The Night Always Comes, Michael F. Russo

Faculty Publications

No abstract provided.

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Decay Of Information For The Kac Evolution, F. Bonetto, R. Han, M. Loss Jan 2021

Decay Of Information For The Kac Evolution, F. Bonetto, R. Han, M. Loss

Faculty Publications

We consider a system of M particles in contact with a heat reservoir of N≫ M particles. The evolution in the system and the reservoir, together with their interaction, is modeled via the Kac’s master equation. We chose the initial distribution with total energy N+ M and show that if the reservoir is initially in equilibrium, that is, if the initial distribution depends only on the energy of the particle in the reservoir, then the entropy of the system decays exponentially to a very small value. We base our proof on a similar property for the Information. A similar argument …

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Weyl Sums And The Lyapunov Exponent For The Skew-Shift Schrödinger Cocycle, Rui Han, Marius Lemm, Wilhelm Schlag Jan 2021

Weyl Sums And The Lyapunov Exponent For The Skew-Shift Schrödinger Cocycle, Rui Han, Marius Lemm, Wilhelm Schlag

Faculty Publications

We study the one-dimensional discrete Schrödinger operator with the skew-shift potential 2λ cos (2π((j/2)ω + jy C x)). This potential is long conjectured to behave like a random one, i.e., it is expected to produce Anderson localization for arbitrarily small coupling constants λ > 0. In this paper, we introduce a novel perturbative approach for studying the zero-energy Lyapunov exponent L(λ) at small λ. Our main results establish that, to second order in perturbation theory, a natural upper bound on L(λ) is fully consistent with L(λ) being positive and satisfying the usual Figotin–Pastur type asymptotics L.λ/ ~ C λ2 as λ …

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On The Highly Connected Dyadic, Near-Regular, And Sixth-Root-Of-Unity Matroids, Ben Clark, Kevin Grace, James Oxley, Stefan H.M. Van Zwam Jan 2021

On The Highly Connected Dyadic, Near-Regular, And Sixth-Root-Of-Unity Matroids, Ben Clark, Kevin Grace, James Oxley, Stefan H.M. Van Zwam

Faculty Publications

Subject to announced results by Geelen, Gerards, and Whittle [Towards a structure theory for matrices and matroids, in Proceedings of the International Congress of Mathematicians, Vol. III, 2006, pp. 827-842], we completely characterize the highly connected members of the classes of dyadic, near-regular, and sixth-root-of-unity matroids.

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(Sl(N),Q) -Opers, The Q-Langlands Correspondence, And Quantum/Classical Duality, Peter Koroteev, Daniel S. Sage, Anton M. Zeitlin Jan 2021

(Sl(N),Q) -Opers, The Q-Langlands Correspondence, And Quantum/Classical Duality, Peter Koroteev, Daniel S. Sage, Anton M. Zeitlin

Faculty Publications

A special case of the geometric Langlands correspondence is given by the relationship between solutions of the Bethe ansatz equations for the Gaudin model and opers-connections on the projective line with extra structure. In this paper, we describe a deformation of this correspondence for SL(N). We introduce a difference equation version of opers called q-opers and prove a q-Langlands correspondence between nondegenerate solutions of the Bethe ansatz equations for the XXZ model and nondegenerate twisted q-opers with regular singularities on the projective line. We show that the quantum/classical duality between the XXZ spin chain and the trigonometric Ruijsenaars–Schneider model may …

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Criticality In The Collapse Of Spherically Symmetric Massless Scalar Fields In Semiclassical Loop Quantum Gravity, F Benitez, R Gambini, S L. Liebling, J Pullin, F Benitez Jan 2021

Criticality In The Collapse Of Spherically Symmetric Massless Scalar Fields In Semiclassical Loop Quantum Gravity, F Benitez, R Gambini, S L. Liebling, J Pullin, F Benitez

Faculty Publications

In a recent paper we showed that the collapse to a black hole in one-parameter families of initial data for massless, minimally coupled scalar fields in spherically symmetric semiclassical loop quantum gravity exhibited a universal mass scaling similar to the one in classical general relativity. In particular, no evidence of a mass gap appeared as had been suggested by previous studies. The lack of a mass gap indicated the possible existence of a self-similar critical solution as in general relativity. Here we provide further evidence for its existence. Using an adaptive mesh refinement code, we show that echoes arise as …

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Relating Dust Reference Models To Conventional Systems In Manifestly Gauge Invariant Perturbation Theory, Kristina Giesel, Bao-Fei Li, Parampreet Singh Jan 2021

Relating Dust Reference Models To Conventional Systems In Manifestly Gauge Invariant Perturbation Theory, Kristina Giesel, Bao-Fei Li, Parampreet Singh

Faculty Publications

Models with dust reference fields in relational formalism have proved useful in understanding the construction of gauge invariant perturbation theory to arbitrary orders in the canonical framework. These reference fields modify the dynamical equations for perturbation equations. However, important questions remain open on the relation with conventional perturbation theories of inflaton coupled to gravity and of multifluid systems, and on understanding modifications in terms of physical degrees of freedom. These gaps are filled in this manuscript for Brown-Kuchar and Gaussian dust models, both of which involve three scalar physical degrees of freedom. We establish a relationship of these models with …

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Phenomenological Implications Of Modified Loop Cosmologies: An Overview, B F. Li, P Singh, A Z. Wang Jan 2021

Phenomenological Implications Of Modified Loop Cosmologies: An Overview, B F. Li, P Singh, A Z. Wang

Faculty Publications

In this paper, we first provide a brief review of the effective dynamics of two recently well-studied models of modified loop quantum cosmologies (mLQCs), which arise from different regularizations of the Hamiltonian constraint and show the robustness of a generic resolution of the big bang singularity, replaced by a quantum bounce due to non-perturbative Planck scale effects. As in loop quantum cosmology (LQC), in these modified models the slow-roll inflation happens generically. We consider the cosmological perturbations following the dressed and hybrid approaches and clarify some subtle issues regarding the ambiguity of the extension of the effective potential of the …

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Discovery And Confirmation Of The Shortest Gamma-Ray Burst From A Collapsar, T Ahumada, L P. Singer, S Anand, M W. Coughlin, T Ahumada, G Ryan, I Andreoni, S B. Cenko, C Fremling, H Kumar, P T. Pang, E Burns, V Cunningham, S Dichiara, T Dietrich, D S. Svinkin, M S. Almualla, A J. Castro-Tirado, K De, R Dunwoody, P Gatkine, E Hammerstein, S Iyyani, J Mangan, E Perley, S Purkayastha, E Bellm, V Bhalerao, B Bolin, M Bulla, C Cannella, P Chandra, D A. Duev, D Frederiks, A. Gal-Yam, M. Graham, A. Y. Q. Ho, K. Hurley, V. Karambelkar, E. C. Kool, S. R. Kulkarni, A. Mahabal, F. Masci, S. Mcbreen, S. B. Pandey, S. Reusch, A. Ridnaia, P. Rosnet, B. Rusholme, A. S. Carracedo, R. Smith, M. Soumagnac, R. Stein, E. Troja, A. Tsvetkova, R. Walters, A. F. Valeev Jan 2021

Discovery And Confirmation Of The Shortest Gamma-Ray Burst From A Collapsar, T Ahumada, L P. Singer, S Anand, M W. Coughlin, T Ahumada, G Ryan, I Andreoni, S B. Cenko, C Fremling, H Kumar, P T. Pang, E Burns, V Cunningham, S Dichiara, T Dietrich, D S. Svinkin, M S. Almualla, A J. Castro-Tirado, K De, R Dunwoody, P Gatkine, E Hammerstein, S Iyyani, J Mangan, E Perley, S Purkayastha, E Bellm, V Bhalerao, B Bolin, M Bulla, C Cannella, P Chandra, D A. Duev, D Frederiks, A. Gal-Yam, M. Graham, A. Y. Q. Ho, K. Hurley, V. Karambelkar, E. C. Kool, S. R. Kulkarni, A. Mahabal, F. Masci, S. Mcbreen, S. B. Pandey, S. Reusch, A. Ridnaia, P. Rosnet, B. Rusholme, A. S. Carracedo, R. Smith, M. Soumagnac, R. Stein, E. Troja, A. Tsvetkova, R. Walters, A. F. Valeev

Faculty Publications

Gamma-ray bursts (GRBs) are among the brightest and most energetic events in the Universe. The duration and hardness distribution of GRBs has two clusters(1), now understood to reflect (at least) two different progenitors(2). Short-hard GRBs (SGRBs; T-90 < 2 s) arise from compact binary mergers, and long-soft GRBs (LGRBs; T-90 > 2 s) have been attributed to the collapse of peculiar massive stars (collapsars)(3). The discovery of SN 1998bw/GRB 980425 (ref. (4)) marked the first association of an LGRB with a collapsar, and AT 2017gfo (ref. (5))/GRB 170817A/GW170817 (ref. (6)) marked the first association of an SGRB with a binary neutron star merger, which also produced a gravitational wave. Here, we present the discovery …

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