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  1. link.springer.com › article › 10Adiabatic theory in Kerr spacetimes | General Relativity and ...

    May 26, 2024 · We outline the essential features of the adiabatic theory and demonstrate how test particle motion in general relativity may be investigated using it. The theory relies on adiabatic invariants and vector elements of the orbits.

  2. link.springer.com › article › 10Questioning the Emergence of Time | Journal for General ...

    1 day ago · The primary difference between Ellis’ EBU and evolving models proposed by some other physicists (e.g. Muller 2016) is the role of quantum mechanical indeterminacy in defining the present moment (see Sect. 3). Problems with Muller’s theory are detailed elsewhere (e.g. Riggs 2019). However, it is philosophers who effectively began the ...

  3. www.astronomy.com › science › how-we-can-understandHow we can understand our universe through math

    May 31, 2024 · In work carried out in the 1950s and 60s, mathematician Yvonne Choquet-Bruhat proved that Einstein’s equations can give rise to gravitational waves and that such waves travel at a finite...

  4. phys.org › news › 2024-06-quantum-behavior-gravityToward testing the quantum behavior of gravity: A photonic ...

    2 days ago · Their work leverages cutting-edge tools and techniques from quantum information theory and quantum optics to demonstrate the principles of gravity-mediated entanglement using particles of light, i ...

  5. en.wikipedia.org › History_of_gravitational_theoryHistory of gravitational theory - Wikipedia

    May 31, 2024 · In the 6th century CE, the Byzantine Alexandrian scholar John Philoponus proposed the theory of impetus, which modifies Aristotle's theory that "continuation of motion depends on continued action of a force" by incorporating a causative force which diminishes over time.

  6. en.wikipedia.org › wiki › General_relativityGeneral relativity - Wikipedia

    2 days ago · General relativity, also known as the general theory of relativity and Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics.

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  8. www.britannica.com › science › dark-energyDark energy | Definition, Discoverers, & Facts | Britannica

    May 25, 2024 · A kind of cosmic repulsive force was first hypothesized by Albert Einstein in 1917 and was represented by a term, the “ cosmological constant,” that Einstein reluctantly introduced into his theory of general relativity in order to counteract the attractive force of gravity and account for a universe that was assumed to be static (neither ...

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