Analyzing If a Graviton Gas Acts Like a Cosmological Vacuum State and “Cosmological” Constant Parameter
نویسندگان
چکیده
منابع مشابه
Graviton Mass or Cosmological Constant?
To describe a massive graviton in 4D Minkowski space-time one introduces a quadratic term in the Lagrangian. This term, however, can lead to a readjustment or instability of the background instead of describing a massive graviton on flat space. We show that for all local Lorentz-invariant mass terms Minkowski space is unstable. We start with the Pauli-Fierz (PF) term that is the only local mass...
متن کاملCosmological constant and vacuum energy
The general thermodynamic analysis of the quantum vacuum, which is based on our knowledge of the vacua in condensed-matter systems, is consistent with the Einstein earlier view on the cosmological constant. In the equilibrium Universes the value of the cosmological constant is regulated by matter. In the empty Universe, the vacuum energy is exactly zero, λ = 0. The huge contribution of the zero...
متن کاملA Stringy Composite Graviton and the Cosmological Constant Problem
A heuristic model of a composite graviton is presented motivated by open string field theory. The model simply assumes a composite closed string sector, world sheet conformal invariance and the observed open string states, i.e., standard model particles, as an input. A UV to IR map from the open string to the closed string sectors naturally emerges. The IR cutoff of the lightest observed fermio...
متن کاملVacuum Energy and the Cosmological Constant
We discuss a numerical relation between the cosmological constant Λ [1] and the vacuum energy arising from the Casimir effect [2]. Many recent theories of the elementary particles invoke the existence of extra dimensions, beyond the familiar 4-dimensional space-time manifold. Often these extra dimensions are compact and have a finite range. In a particular model [3] the range R is of the order ...
متن کاملThe Graviton as a Bound State and the Cosmological Constant Problem
The graviton is pictured as a bound state of a fermion and antifermion with the spacetime metric assumed to be a composite object of spinor fields, based on a globally Lorentz invariant action proposed by Hebecker and Wetterich. The additional degrees of freedom beyond those of the graviton are described by Goldstone boson gravitational degrees of freedom. If we assume that the fermion is a lig...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of High Energy Physics, Gravitation and Cosmology
سال: 2017
ISSN: 2380-4327,2380-4335
DOI: 10.4236/jhepgc.2017.32032