Articles tagged with Cosmological Constant
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A recent study used Japan's Fugaku supercomputer to simulate the effects of time-varying dark energy on cosmic evolution. The results show that a higher matter density creates stronger gravitational forces, leading to earlier and more efficient formation of massive galaxy clusters.
A groundbreaking new framework unifies gravity from quantum relative entropy, bridging the gap between quantum mechanics and Einstein's general relativity. The theory predicts a small, positive cosmological constant aligning with experimental observations.
Researchers investigate universe expansion, Big Bang, black holes, and dark energy using a time-reversal model. They propose an explanation for the Big Bang and explore interior structure of black holes.
Researchers at the Flatiron Institute and colleagues used AI-powered approach, SimBIG, to estimate five cosmological parameters with precision. The method significantly improved previous results, yielding less than half the uncertainty and closely agreeing with other estimates based on observations.
A new study has sorted through models attempting to solve the cosmological tension, a discrepancy between two ways of calculating the universe's expansion. Three models that were previously viable solutions were excluded by the new data, while others reduced the tension but not solved it.
Researchers propose a new interpretation of dark energy, linking zero-point fluctuations to polarisability of the vacuum. This leads to an energy density that can be calculated and matches measured values for the cosmological constant.
Scientists at Kyoto University propose a novel approach using holograms to approximate the universe's expansion in de Sitter space. The model uses conformal field theory and a positive integer for the cosmological constant, enabling the identification of the first example of two-dimensional CFT.
Physicist Lucas Lombriser proposes a new mathematical manipulation of general relativity equations to harmonize theory and observation on the cosmological constant. Theoretical value is 0.704%, close to the best experimental estimate, resolving a 10121-year discrepancy.
The cosmological constant was first introduced by Einstein in 1917 to make the static universe model work. However, after the discovery of cosmic expansion, it became marginalized until recent observations and experiments revived its relevance as a key component of dark energy theory.
A team of researchers discovered that dark energy behaves similarly to Einstein's cosmological constant with a precision of 10%, contradicting several theoretical predictions. The study uses innovative camera technology and observations from multiple telescopes worldwide.
Physicists Eric Linder and Robert Caldwell separate dark energy scenarios through satellite searches, offering a way to distinguish among dark energy possibilities. The Joint Dark Energy Mission experiments may be able to determine which scenario is correct.
Cosmologists suggest universe may collapse in 10-20 billion years due to dark energy, reversing the popular view of a runaway universe. The Stanford team's model predicts the universe will slow down and contract, leading to a cosmic 'big crunch',