Mostrando 441 - 460 Resultados de 8,169 Para Buscar '"gravity"', tiempo de consulta: 0.18s Limitar resultados
  1. 441
    por Giudice, Gian F., Lee, Hyun Min
    Publicado 2014
    “…These models are based on induced gravity, with the Planck mass determined by the vacuum expectation value of the inflaton.…”
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  2. 442
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  5. 445
    por Papantonopoulos, Eleftherios
    Publicado 2015
    “…In the last few years modified gravity theories have been proposed as extensions of Einstein's theory of gravity. …”
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  6. 446
    “…We find static spherically symmetric solutions of scale invariant $R^2$ gravity. The latter has been shown to be equivalent to General Relativity with a positive cosmological constant and a scalar mode. …”
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  7. 447
  8. 448
    “…Hence there should exist a broader theory comprising both in appropriate limits, i.e., quantum gravity. This book gives readers a comprehensive introduction accessible to interested non-experts to the main issues surrounding the search for quantum gravity. …”
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  9. 449
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  12. 452
    “…We study two nonlinear extensions of the nonlocal $R\,\Box^{-2}R$ gravity theory. We extend this theory in two different ways suggested by conformal symmetry, either replacing $\Box^{-2}$ with $(-\Box + R/6)^{-2}$, which is the operator that enters the action for a conformally-coupled scalar field, or replacing $\Box^{-2}$ with the inverse of the Paneitz operator, which is a four-derivative operator that enters in the effective action induced by the conformal anomaly. …”
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  13. 453
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  15. 455
    “…In the unitary gauge, massive gravity emerges, being thus the result of a continuous medium propagating in spacetime. …”
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  16. 456
    por Salvio, Alberto
    Publicado 2016
    “…The Higgs naturalness problem is solved if the growth of Einstein's gravitational interaction is softened at an energy $ \lesssim 10^{11}\,$GeV (softened gravity). We work here within an explicit realization where the Einstein-Hilbert Lagrangian is extended to include terms quadratic in the curvature and a non-minimal coupling with the Higgs. …”
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