Clustering and Runaway Merging in a Primordial Black Hole Dominated Universe

Kavli Affiliate: Gordan Krnjaic | Summary:If primordial black holes (PBH) are present in the early universe, their contribution to the energy budget grows relative to that of radiation and generically becomes dominant unless the initial abundance is exponentially small. This black hole domination scenario is largely unconstrained for PBHs with masses $lesssim 10^9,mathrmg$, which evaporate […]


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How much is ‘enough’? Considerations for functional connectivity reliability in pediatric naturalistic fMRI

Kavli Affiliate: Deanna J. Greene and Jeremy Willsey | Authors: Shefali S. Rai, Kate J. Godfrey, Kirk Graff, Ryann Tansey, Daria Merrikh, Shelly Yin, Matthew Feigelis, Damion V. Demeter, Tamara Vanderwal, Deanna J. Greene and Signe L. Bray | Summary: functional connectivity (FC) measurements are important for robust and reproducible findings, yet pediatric functional magnetic […]


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The Langlands formula and perverse sheaves

Kavli Affiliate: Mikhail Kapranov | Summary:For a complex reductive Lie algebra $mathfrakg$ with Cartan subalgebra $mathfrakh$ and Weyl group $W$ we consider the category $textPerv(W backslash mathfrakh)$ of perverse sheaves on $W backslash mathfrakh$ smooth w.r.t. the natural stratification. We construct a category $boldsymbolmathcalC$ such that $textPerv(Wbackslash mathfrakh)$ is identified with the category of functors […]


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The Simons Observatory: Design, Integration, and Current Status of Small Aperture Telescopes

Kavli Affiliate: Shawn Henderson | Summary:The Simons Observatory (SO) is a cosmic microwave background (CMB) survey experiment located in the Atacama Desert in Chile at an elevation of 5200 meters, nominally consisting of an array of three 0.42-meter small aperture telescopes (SATs) and one 6-meter large aperture telescope (LAT). SO will make accurate measurements of […]


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Formation Rate of Quasiperiodic Eruptions in Galactic Nuclei Containing Single and Dual Supermassive Black Holes

Kavli Affiliate: Fukun Liu| Summary: Quasiperiodic eruptions (QPEs) are a novel class of transients recently discovered in a few extragalactic nuclei. It has been suggested that a QPE can be produced by a main-sequence star undergoing repeated partial disruptions by the tidal field of a supermassive black hole (SMBH) immediately after getting captured on a […]


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Formation Rate of Quasiperiodic Eruptions in Galactic Nuclei Containing Single and Dual Supermassive Black Holes

Kavli Affiliate: Xian Chen | First 5 Authors: Chunyang Cao, F. K. Liu, Xian Chen, Shuo Li, | Summary: Quasiperiodic eruptions (QPEs) are a novel class of transients recently discovered in a few extragalactic nuclei. It has been suggested that a QPE can be produced by a main-sequence star undergoing repeated partial disruptions by the […]


Continue.. Formation Rate of Quasiperiodic Eruptions in Galactic Nuclei Containing Single and Dual Supermassive Black Holes

Formation Rate of Quasi-periodic Eruptions in Galactic Nuclei Containing Single and Dual Supermassive Black Holes

Kavli Affiliate: Xian Chen | First 5 Authors: Chunyang Cao, F. K. Liu, Xian Chen, Shuo Li, | Summary: Quasi-periodic eruptions (QPEs) are a novel class of transients recently discovered in a few extragalactic nuclei. It has been suggested that a QPE can be produced by a main-sequence star undergoing repeated partial disruptions by the […]


Continue.. Formation Rate of Quasi-periodic Eruptions in Galactic Nuclei Containing Single and Dual Supermassive Black Holes

Fractionalized Kohn-Sham Scheme for Strongly Correlated Electrons

Kavli Affiliate: Zheng Zhu | First 5 Authors: Bo Zhao, Jingyu Zhao, Zheng Zhu, Jian Wu, Zheng Liu | Summary: We propose to expand the territory of density functional theory to strongly correlated electrons by reformulating the Kohn-Sham scheme in the representation of fractionalized particles. We call it the “KS* scheme.” Using inhomogeneous $t$-$J$ chains […]


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Fractionalized Kohn-Sham ansatz for strongly-correlated electrons

Kavli Affiliate: Zheng Zhu | First 5 Authors: Bo Zhao, Jingyu Zhao, Zheng Zhu, Jian Wu, Zheng Liu | Summary: We propose to expand the territory of density functional theory to strongly-correlated electrons by reformulating the Kohn-Sham ansatz in the representation of fractionalized particles. We call it the ”KS* ansatz”. Using inhomogeneous t-J chains as […]


Continue.. Fractionalized Kohn-Sham ansatz for strongly-correlated electrons