Quantum initial conditions for curved inflating universes

Kavli Affiliate: Anthony Lasenby | Summary:We discuss the challenges of motivating, constructing, and quantizing a canonically normalized inflationary perturbation in spatially curved universes. We show that this has historically proved challenging due to the interaction of nonadiabaticity with spatial curvature. We construct a novel curvature perturbation that is canonically normalized in the sense of its […]


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Background Determination for the LUX-ZEPLIN (LZ) Dark Matter Experiment

Kavli Affiliate: C. M. Ignarra | Summary:The LUX-ZEPLIN experiment recently reported limits on WIMP-nucleus interactions from its initial science run, down to $9.2times10^-48$ cm$^2$ for the spin-independent interaction of a 36 GeV/c$^2$ WIMP at 90% confidence level. In this paper, we present a comprehensive analysis of the backgrounds important for this result and for other […]


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The role of non-affine deformations in the elastic behavior of the cellular vertex model

Kavli Affiliate: Mark J. Bowick | First 5 Authors: Michael F. Staddon, Arthur Hernandez, Mark J. Bowick, Michael Moshe, M. Cristina Marchetti | Summary: The vertex model of epithelia describes the apical surface of a tissue as a tiling of polygonal cells, with a mechanical energy governed by deviations in cell shape from preferred, or […]


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Electron Dynamics at High-Energy Densities in Nickel from Non-linear Resonant X-ray Absorption Spectra

Kavli Affiliate: Robert Rosner| First 5 Authors: Robin Y. Engel, Robin Y. Engel, , , | Summary:The pulse intensity from X-ray free-electron lasers (FELs) can create extreme excitation densities in solids, entering the regime of non-linear X-ray-matter interactions. We show L3-edge absorption spectra of metallic nickel thin films with fluences entering a regime where several […]


Continue.. Electron Dynamics at High-Energy Densities in Nickel from Non-linear Resonant X-ray Absorption Spectra