October 7, 2025 – Kavli Institute Pre-Print Publications

Comparing XRISM cluster velocity dispersions with predictions from cosmological simulations: are feedback models too ejective?

Posted by klaurent October 7, 2025MIT

Kavli Affiliate: Erin Kara | First 5 Authors: XRISM Collaboration, XRISM Collaboration, , , | Summary: The dynamics of the intra-cluster medium (ICM), the hot plasma that fills galaxy clusters, are shaped by gravity-driven cluster mergers and feedback from supermassive black holes (SMBH) in the cluster cores. XRISM measurements of ICM velocities in several clusters […]

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Studying the gravitational-wave population without looking that FAR out

Posted by klaurent October 7, 2025October 20, 2025MIT

Kavli Affiliate: Salvatore Vitale | First 5 Authors: Noah E. Wolfe, Noah E. Wolfe, , , | Summary: From catalogs of gravitational-wave transients, the population-level properties of their sources and the formation channels of merging compact binaries can be constrained. However, astrophysical conclusions can be biased by misspecification or misestimation of the population likelihood. Despite […]

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Nonlinear Evolution of the Matter Trispectrum with Primordial Parity Violation

Posted by klaurent October 7, 2025October 20, 2025Tokyo

Kavli Affiliate: Eiichiro Komatsu | First 5 Authors: Sha Azyzy, Sha Azyzy, , , | Summary: Parity-odd four-point correlation functions, or trispectra, of cosmic matter density fields provide a unique probe of fundamental symmetries in cosmology. Trispectra of primordial matter density fluctuations produced in the early universe are modified by the subsequent nonlinear structure formation. […]

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Commensurate-incommensurate Mott transition without magnetic field: emergence of nematic Luttinger liquid in XXZ chain

Posted by klaurent October 7, 2025October 20, 2025Delft

Kavli Affiliate: Natalia Chepiga | First 5 Authors: Julien Fitouchi, Julien Fitouchi, , , | Summary: We investigate the zero-magnetization phase diagram of a spin-1/2 chain with competing ferromagnetic nearest-neighbor and antiferromagnetic next-nearest-neighbor exchange couplings in the strongly interacting regime. Using density matrix renormalization group (DMRG) simulations, we discover two successive commensurate-incommensurate transitions of the […]

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Flow4Agent: Long-form Video Understanding via Motion Prior from Optical Flow

Posted by klaurent October 7, 2025October 20, 2025Caltech

Kavli Affiliate: Wei Gao | First 5 Authors: Ruyang Liu, Ruyang Liu, , , | Summary: Long-form video understanding has always been a challenging problem due to the significant redundancy in both temporal and spatial contents. This challenge is further exacerbated by the limited context length of Multimodal Large Language Models (MLLMs). To address this […]

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Ultracold Neutron Guide-Coating Facility at U.Winnipeg

Posted by klaurent October 7, 2025October 20, 2025Tokyo

Kavli Affiliate: T. Higuchi | First 5 Authors: T. Hepworth, T. Hepworth, , , | Summary: We report the construction and commissioning of a new ultracold neutron (UCN) guide-coating facility at the University of Winnipeg. The facility employs pulsed laser deposition (PLD) to produce diamond-like carbon (DLC) coatings on cylindrical UCN guides up to 1 […]

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Everyone wants something better than $Λ$CDM

Posted by klaurent October 7, 2025October 30, 2025Chicago

Kavli Affiliate: Michael S. Turner | First 5 Authors: Michael S. Turner, Michael S. Turner, , , | Summary: The current cosmological paradigm, $Lambda$CDM, is characterized its expansive description of the history of the Universe, its deep connections to particle physics and the large amounts of data that support it. Nonetheless, $Lambda$CDM’s critics argue that […]

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