Month: September 2022

HUNTING THE ULTRALIGHT SNARK. “In this Letter we repeat the analysis of Ref. [64] by including the 35 new binary black holes reported by the LIGO-Virgo-Kagra collaboration at high significance. We find the probability a scalar boson with masses in the range 1.3×10(−13) eV ≤ μs ≤ 2.7×10(−13) eV to be smaller than 0.01%.” https://lnkd.in/gnQbwGA View in LinkedIn

ULTRALIGHT BOSONS. “The evidence against the existence of bosons with this mass arises mainly from two highly spinning black holes found in the new data set, namely GW190412 and GW190517.” https://lnkd.in/gnQbwGA View in LinkedIn

THE BOTTLENECK. “Another important factor to assess if black holes will be spun down by boson clouds is the time interval between the formation of the black hole and the merger: if a black hole merges too quickly after being born it might not have the time to undergo superradiance, even if bosons of the appropriate mass exist.” https://lnkd.in/gnQbwGA View in LinkedIn

FINDING. “In this Letter, we have shown that the BBHs observed by LIGO/Virgo strongly disfavour the existence of scalar ultralight bosons with masses in the range 1.3 × 10(−13) eV ≤ μs ≤ 2.7 × 10(−13) eV. The statistical evidence is entirely contributed by the two highly spinning primaries in the systems GW190412 and GW190517.” (BBH = binary black holes). https://lnkd.in/gnQbwGA View in LinkedIn

THE QUESTION. “Are black holes about information?” https://lnkd.in/dHGT8xw View in LinkedIn

THE PREMISE. “The ascription of entropy to a black hole thus permits a generalization of the traditional Second Law, as Bekenstein asserts: “The common entropy in the black-hole exterior plus the black-hole entropy never decreases.” https://lnkd.in/dHGT8xw View in LinkedIn

QUANTUM SUPERPOSITION. “An international team of researchers has caused molecule made up of up to 2,000 atoms to occupy two places at the same time.” https://lnkd.in/d2WbhJz View in LinkedIn

The fractal world backlit by radiant sunlight. View in LinkedIn

FRAGMENT FROM NATURE this weekend focuses on a remarkably short article by an extraordinary man about how metabolic pathways evolved. These intricate, far from equilibrium reactions are laced together in highly improbable ways, exquisitely controlled, and perform in unison in ways we simply do not understand. View in LinkedIn

ARTICLE TITLE. “Prebiotic metabolic networks? By Pier Luigi Luisi, from the Department of Biology, University of Roma Tre, Rome, Italy.’ https://www.embopress.org/doi/full/10.1002/msb.20145351 View in LinkedIn