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We consider cosmological model in 4+1 dimensions with variable scale factor in extra dimension and static external space. The time scale factor is changing. Variations of light velocity, gravity constant, mass and pressure are determined…

广义相对论与量子宇宙学 · 物理学 2007-05-23 W. B. Belayev

Recently, a new framework for describing the multiverse has been proposed which is based on the principles of quantum mechanics. The framework allows for well-defined predictions, both regarding global properties of the universe and…

高能物理 - 理论 · 物理学 2013-05-29 Grant Larsen , Yasunori Nomura , H. L. L. Roberts

We have investigated the implications of Quantum Mechanics to macroscopic scale. Evaporation of Black Holes and evolution of pulsars may be one of the consequences of this conjecture. The two equations GM=Rc^2 and GM^2=hc where R and M are…

综合物理 · 物理学 2007-05-23 A. I. Arbab

The Standard Model (SM) ascribes the observed mass of elementary particles to an effective interaction between basis states defined without mass terms and a scalar potential associated with the Higgs boson. In the relativistic field theory…

综合物理 · 物理学 2022-02-01 M. Land

We present technical results which extend previous work and show that the cosmological constant of general relativity is an artefact of the reduction to 4D of 5D Kaluza-Klein theory (or 10D superstrings and 11D supergravity). We argue that…

广义相对论与量子宇宙学 · 物理学 2009-11-07 Paul S. Wesson , Hongya Liu

Most of the calculations done to obtain the value of the cosmological constant use methods of quantum gravity, a theory that has not been established as yet, and a variety of results are usually obtained. The numerical value of the…

天体物理学 · 物理学 2007-05-23 Moshe Carmeli

In this work a satisfactory, simple theoretical prediction of the data corresponding to observationally (by fine tuning condition) estimated value of the cosmological constant is given. It is supposed (in conceptually analogy with…

天体物理学 · 物理学 2007-12-27 Vladan Pankovic , Simo Ciganovic , Jovan Ivanovic , Rade Glavatovic , Petar Grujic

The quantum field theory prediction of the cosmological constant is 120 orders of magnitude higher than the observed value. This is known as the cosmological constant problem. Here, we deal with the cosmological constant as a scalar field…

高能物理 - 理论 · 物理学 2010-11-29 Nicolas Avilan V. , Jose Rolando Roldan

In the Kaluza-Klein model with a cosmological constant and a flux, the external spacetime and its dimension of the created universe from a $S^s \times S^{n-s}$ seed instanton can be identified in quantum cosmology. One can also show that in…

广义相对论与量子宇宙学 · 物理学 2009-11-11 Z. C. Wu

At the level of the Planck scale, the spacetime metric has to be considered a quantum variable. Conformal quantum fluctuations of the metric tensor are studied here. They lead to an extra term in the Einstein equations which can be…

天体物理学 · 物理学 2007-05-23 Alex H. Blin

An speculative solution for the cosmological constant problem is proposed. It is argued that while the true quantum vacuum energy density is of the order of $M_P^4$, the observed classical vacuum energy density may be much smaller due to…

高能物理 - 理论 · 物理学 2011-07-19 F. Darabi

Three of the big puzzles of theoretical physics are the following: (i) There is apparently no time evolution in the dynamics of quantum general relativity, because the allowed quantum states must obey the Hamiltonian constraint. (ii) During…

广义相对论与量子宇宙学 · 物理学 2015-12-29 Shreya Banerjee , Sayantani Bera , Tejinder P. Singh

The numerical value of the cosmological constant is calculated using a recently suggested cosmological model and found to be 2.036 x 10^(-35) s^(-2). This value of the cosmological constant is in excellent agreement with the measurements…

天体物理学 · 物理学 2009-11-06 Moshe Carmeli , Tanya Kuzmenko

In a quest to explain the small value of the today's cosmological constant, following the approach introduced in [1], we show that the theoretical value of cosmological constant is consistent with its observational value. In more detail, we…

广义相对论与量子宇宙学 · 物理学 2015-10-08 T. Rostami , S. Jalalzadeh

We 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…

广义相对论与量子宇宙学 · 物理学 2025-05-20 Ahmed Farag Ali , Nader Inan

In this essay, we present a new understanding of the cosmological constant problem, built upon the realization that the vacuum energy density can be expressed in terms of a phase space volume. We introduce a UV-IR regularization which…

高能物理 - 理论 · 物理学 2023-03-31 Laurent Freidel , Jerzy Kowalski-Glikman , Robert G. Leigh , Djordje Minic

In this article the concept of mass is analyzed based on the special and general relativity theories and particle (quantum) physics. The mass of a particle (m=E(0)/c^2) is determined by the minimum (rest) energy to create that particle…

综合物理 · 物理学 2009-02-18 S. O. Tagieva , M. Erturk

A classical two dimensional theory of gravity which has a number of interesting features (including a Newtonian limit, black holes and gravitational collapse) is quantized using conformal field theoretic techniques. The critical dimension…

高能物理 - 理论 · 物理学 2009-10-22 R. B. Mann

In the present paradigm the space is filled with very high flux of very small quanta whose wavelength equals the Planck's length. The quantum energy is very small, so the relevant Planck constant ho is much smaller than the usual h. This…

综合物理 · 物理学 2007-05-23 Maurizio Michelini

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…

广义相对论与量子宇宙学 · 物理学 2016-02-08 J. W. Moffat