Results 81 to 90 of about 7,599,029 (258)
Inflation and the cosmological constant
上海师范大学学报. 自然科学版, 2014 By assuming the cosmological “constant” is no longer a constant during the inflation epoch,it is found that the cosmological constant fine-tuning problem is solved.In the meanwhile,inflation models could predict a large tensor-to-scalar ratio,correct ...
FENG Chaojun, LI Xinzhou
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Naturalness: past, present, and future
European Physical Journal C: Particles and Fields, 2023 We assess the state of naturalness in high-energy physics and summarize recent approaches to the three major naturalness problems: the cosmological constant problem, the electroweak hierarchy problem, and the strong CP problem.
Nathaniel Craig
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Brane realization of q-theory and the cosmological constant problem [PDF]
, 2016 We discuss the cosmological constant problem using the properties of a freely suspended two-dimensional condensed-matter film, i.e., an explicit realization of a 2D brane. The large contributions of vacuum fluctuations to the surface tension of this film
F. Klinkhamer, G. Volovik
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ON THE COSMOLOGICAL CONSTANT PROBLEM [PDF]
International Journal of Modern Physics D, 1996 A simple quantum mechanical model of a closed interacting system is studied following the intrinsic time formalism developed recently, on the basis of the modified Born-Oppenheimer approximation. Apart from shedding further insights into the recent results on a possible nongravitating vacuum energy in the universe, the study also offers potentially ...
openaire +1 more source
Caring with forests: Human and more‐than‐human care in forest occupations in Germany
People and Nature, EarlyView.Abstract Drawing on ongoing ethnographic and participatory action research within forest occupations in Germany, this paper develops the concept of ‘caring with forests’ to theorise the mutual, multidimensional relationships of care that emerge between humans and more‐than‐human beings in environmental protest settings.
Sebastian Garbe
wiley +1 more source
Cosmological constant problem and renormalized vacuum energy density in curved background [PDF]
, 2016 The current vacuum energy density observed as dark energy ρdark≃ 2.5×10−47 GeV4 is unacceptably small compared with any other scales. Therefore, we encounter serious fine-tuning problem and theoretical difficulty to derive the dark energy.
K. Kohri, H. Matsui
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Absence of cosmological constant problem in special relativistic field theory of gravity: one-loop renormalization group [PDF]
Annals of Physics, 2014 There exists a nonlinear theory of gravity which is not structurally equivalent to general relativity and that, in the non-interacting limit, describes a free massless particle with helicity ±2.
R. Carballo-Rubio, C. Barceló, L. Garay
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People and Nature, EarlyView.Abstract Despite an ever‐growing body of environmental laws, biodiversity loss and climate breakdown persist globally. This has prompted debate over whether existing legal regimes can be strengthened sufficiently to address these crises, or whether more transformative legal approaches are needed The concept of rights of nature, which is gaining ...
Maximilian Nawrath +3 more
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Entropy in the Present and Early Universe: New Small Parameters and Dark Energy Problem
Entropy, 2010 It is demonstrated that entropy and its density play a significant role in solving the problem of the vacuum energy density (cosmological constant) of the Universe and hence the dark energy problem.
Alexander Shalyt-Margolin
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Mass Generation, the Cosmological Constant Problem, Conformal Symmetry, and the Higgs Boson [PDF]
, 2016 In 2013 the Nobel Prize in Physics was awarded to Francois Englert and Peter Higgs for their work in 1964 along with the late Robert Brout on the mass generation mechanism (the Higgs mechanism) in local gauge theories.
P. Mannheim
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