Quantum Ising transition on the Cayley tree: boundary criticality, universality, and an effective Bethe line

Posted by klaurent Delft, This Week: Nanoscience

Kavli Affiliate: Natalia Chepiga | Summary:We investigate quantum criticality in the transverse-field Ising model on finite Cayley trees and demonstrate that their extensive boundary fundamentally changes the nature of the quantum phase transition compared with the infinite, boundary-free Bethe lattice. Using tree tensor-network simulations for systems with up to $N=12286$ sites, we identify a boundary-driven […]


Continue.. Quantum Ising transition on the Cayley tree: boundary criticality, universality, and an effective Bethe line

An updated view of Jupiter’s UV main auroral emission: large-scale analysis of UV and particle data from Juno’s first 60 orbits

Posted by klaurent MIT

Kavli Affiliate: George Clark | Summary:The properties and origins of Jupiter’s UV main auroral emission are, at present, not yet fully understood, particularly the extent to which its two distinct zones, the Zone-I and Zone-II aurora, originate from a common source. In this work, remote-sensing and in-situ data from the Juno spacecraft are used to […]


Continue.. An updated view of Jupiter’s UV main auroral emission: large-scale analysis of UV and particle data from Juno’s first 60 orbits

Identifying the principal mechanism of star formation feedback

Posted by klaurent Peking

Kavli Affiliate: Lile Wang |Summary:Feedback from massive stars regulates the formation of next-generation stars and planets and thus shapes the evolution of galaxies, yet observational evidence capable of determining which mechanism dominates the feedback process has long been lacking. Here,we present a large-scale HI survey toward Orion A$.$ With an unprecedented sensitivity and superior resolution, […]


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Nearly pristine gas in a galaxy 1 billion years after the Big Bang

Posted by klaurent Cambridge

Kavli Affiliate: Martin Haehnelt | Summary:Excitation of carbon and oxygen ions is the primary mechanism by which collapsing gas clouds dissipate heat to form new stars. At early cosmic times, in galaxies with chemically pristine gas, many stars are expected to have masses far larger than the mass of our sun due to the deficit […]


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Probing the wave-vector gap in nanoscale magnonics

Posted by klaurent Delft

Kavli Affiliate: Toeno Van Der Sar | Summary:Short-wavelength spin waves are central to miniaturizing magnonic devices and to studying exchange-dominated magnetization dynamics. Yet the wave-vector range between roughly 30 and 300 radians per micrometre has remained difficult to access experimentally, posing challenges for both excitation and detection. This Perspective reviews recent advances in emerging measurement […]


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Framework for an AI-Ready ARPES Community Database

Posted by klaurent Berkeley

Kavli Affiliate: Alessandra Lanzara | Summary:Condensed matter stands to gain profoundly from widespread adoption of artificial intelligence (AI). However, its current means of data organization impedes this endeavor. As a premier measure of electronic structure underlying material properties, Angle-Resolved Photoemission Spectroscopy (ARPES) has accumulated over four decades of spectra, yet the community’s publication-centered workflow preserves […]


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Sex Differences in Human Music Perception are Negligible

Posted by klaurent Columbia

Kavli Affiliate: Sarah Woolley | Authors: Mila Bertolo, Daniel Müllensiefen, Isabelle Peretz, Sarah C. Woolley, Jon T. Sakata and Samuel A. Mehr | Summary: Since Darwin, researchers have proposed that human musicality evolved in a reproductive context in which males produce music to signal their mate quality to females. Sexually selected traits result from sex […]


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The $R$-Process Alliance: On J0010$-$1735, an Accreted, Chemically Unusual, Metal-poor Star with $R$-process Enhancement

Posted by klaurent MIT

Kavli Affiliate: Anna Frebel | Summary:We present a detailed chemo-dynamical analysis of the chemically peculiar very metal-poor ([Fe/H]$=-2.22pm 0.11$) Milky Way (MW) halo star, 2MASS J00101758$-$1735387 (hereafter J0010-1735), discovered by the $R$-Process Alliance. We derive abundances for 45 elements, including 28 neutron-capture elements, and confirm that thestar is highly $r$-process-enhanced, with [Eu/Fe]=$+1.30$. The light, $α$, […]


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TDCOSMO 2026: new insights on the Hubble tension from strong lensing time delays

Posted by klaurent Chicago

Kavli Affiliate: Joshua Frieman | Summary:We discuss the measurement of the Hubble constant ($H_0$) in flat $Λ$ cold dark matter cosmology based on the blind hierarchical analysis of 11 multiply-imaged quasars (hereafter the TDCOSMO-2026 sample) and described in greater detail in a companion paper. In addition to the time delays, we use lens models based […]


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TDCOSMO 2026: A 3% measurement of the Hubble constant from strong lensing and stellar kinematics

Posted by klaurent Chicago

Kavli Affiliate: Joshua Frieman | Summary:We present cosmological constraints from 11 strongly lensed quasars with measured time delays (hereafter, the TDCOSMO-2026 sample). In addition to expanding the sample, we improve many aspects of our blind analysis with respect to our 2025 analysis. Among other improvements, spatially resolved kinematics are available for nine systems, including six […]


Continue.. TDCOSMO 2026: A 3% measurement of the Hubble constant from strong lensing and stellar kinematics