Results 101 to 110 of about 7,599,029 (258)
AstronomyWe propose that the observed value of the cosmological constant may be explained by a fundamental uncertainty in the spacetime metric, which arises when combining the principle that mass and energy curve spacetime with the quantum uncertainty associated ...
Ahmed Farag Ali, Nader Inan
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Constraining Dark Energy from the Local Group Dynamics
The Astrophysical Journal Letters, 2023 This Letter develops a method to constrain the cosmological constant Λ from binary galaxies, focusing on the Milky Way and Andromeda galaxies. We provide an analytical solution to the two-body problem with Λ and show that the ratio between the Keplerian ...
David Benisty +2 more
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The Cosmological Constant Problem: Why it's hard to get Dark Energy from Micro-physics [PDF]
, 2013 These notes present a brief introduction to `naturalness' problems in cosmology, and to the Cosmological Constant Problem in particular. The main focus is the `old' cosmological constant problem, though the more recent variants are also briefly discussed.
C. Burgess
semanticscholar +1 more source
Unmanagement Education for the Age of Climate Crisis
British Journal of Management, EarlyView.Abstract This paper examines how embodied, situated and relational experiences outside‐the‐classroom can open space for epistemic dislocations in Management Education under conditions of ecological crisis. Drawing on a qualitative pedagogical experience in a sustainability course in Brazil, informed by Design‐Based Research—whose assumptions of control,
Fernanda Cassab Carreira +1 more
wiley +1 more source
Toward Solving the Cosmological Constant Problem By Embedding [PDF]
, 2012 The typical scalar field theory has a cosmological constant problem. We propose a generic mechanism by which this problem is avoided at tree level by embedding the theory into a larger theory.
Buniy, Roman V., Kephart, Thomas W.
core +1 more source
Cosmological constant from a deformation of the Wheeler–DeWitt equation
Nuclear Physics B, 2016 In this paper, we consider the Wheeler–DeWitt equation modified by a deformation of the second quantized canonical commutation relations. Such modified commutation relations are induced by a Generalized Uncertainty Principle.
Remo Garattini, Mir Faizal
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, 2014 The aim of this work is concentration of the relevant knowledges from area history of the cosmological constant. Theory listed in time sequence show its origin, evolution and problems associated with it. In this work are commented static models which are
Bjelka, Jakub
core
Cosmic acceleration in the nonlocal approach to the cosmological constant problem
European Physical Journal C: Particles and Fields, 2018 We have recently constructed a manifestly local formulation of a nonlocal approach to the cosmological constant problem which can treat with quantum effects from both matter and gravitational fields. In this formulation, it has been explicitly shown that
Ichiro Oda
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Quantum Gravity and the Cosmological Constant Problem [PDF]
, 2014 A finite and unitary nonlocal formulation of quantum gravity is applied to the cosmological constant problem. The entire functions in momentum space at the graviton-standard model particle loop vertices generate an exponential suppression of the vacuum ...
J. W. Moffat
semanticscholar +1 more source
The Cosmological constant and the coincidence problem in a new cosmological interpretation of the universal constant “c” [PDF]
International Journal of Theoretical Physics, 2009 In a recent paper (Vigoureux et al. Int. J. Theor. Phys. 47:928, 2007) it has been suggested that the velocity of light and the expansion of the universe are two aspects of one single concept connecting space and time in the expanding universe. It has then be shown that solving Friedmann's equations with that interpretation (and keeping c = constant ...
Viennot, D., Vigoureux, J.M.
openaire +3 more sources