twin universe cosmology

En résumé (grâce à un LLM libre auto-hébergé)

  • The cosmology of twin universes explores models where physical constants vary.
  • Theories have been developed to explain the variation of constants such as G and c.
  • The paper proposes a model where all constants vary together in a coherent manner.

twin universe cosmology Twin Universes cosmology (p 6)
7) A model with "variable constants".

...The hypothesis of the constancy of the so-called constants of physics was first challenged by Milne [15]. Then other authors: P.A. Dirac [16 and 17], F. Hoyle and J.V. Narlikar [18], V. Canuto and J. Lodenquai [19], T.C. Van Flandern [20], V. Canuto and S.H. Hsieh [20], A. Julg [21], developed ideas mainly based on the variation of G. Time-dependent G has also been considered by Brans and Dicke [22]; time-dependent e by Ratra [23]. Guth [24], Sugiyama and Sato [25] and Yoshii and Sato [26] considered a time-variable cosmological constant. In general, these approaches focus on the variation of a certain number of "constants", not of all the constants, in a combined fashion, as developed in the present paper. H. Reeves [27] studied the impact of the separate variation of the constants, one after the other. V.S. Troistkii [28] first suggested in 1987 the possible variation of c, and, in general, of all the "constants", but, after choosing a leading parameter, he just tried to adjust the different exponents, associated to a priori polynomial empirical laws, to fit with observational features.

...In the present paper we are going to build a cosmology where all the "constants" vary conjointly. This will be made consistent with the field equation (1). We are going to search laws that let the equations of physics be invariant, so that these variations cannot be detected in local laboratory experiments. These equations are the following:

The Schrödinger equation:

(30)

Equation 30

The Boltzmann equation:

(31)

Equation 31

where f is the distribution function of the velocity v, r = (x,y,z), t the time, (g, a, w) the classical impact parameters of a binary collision.

The (new) Poisson equation for gravitation (see reference [1]) is:

(32) D f = 4 p G ( r - r*)

r is the mass density in our fold of the Universe and r* the mass density in the twin fold.

The (new) field equation

(33) S = c ( T - T*)

where:

(34)

Equation 34

is the Einstein constant, G the "constant" of gravity and c the velocity of light.

The Maxwell equations are:

(35)

Equation 35

(36)

Equation 36

(37) Ñ . B = 0

(38)

Equation 38

E and B are respectively the electric and magnetic fields. We consider the Maxwell equations for a neutral medium, for we assume that the Universe is electrically neutral. These equations are not all independent. For example, the Poisson equation for gravitation (32) comes from the field equation (33), see [1].

...Introducing a characteristic length R and a characteristic time T we can write these characteristic equations into an adimensional form:

The Schrödinger equation (30), with:

(39)

Equation 39

(40)

Equation 40

becomes:

(41)

Equation 41

The Boltzmann equation (31), with:

(42) v = c **z ** r = R **x **g = c g a = R a

(43)

Equation 43

(44)

Equation 44

(45

becomes:

(46)

The Poisson equation for the gravitational potential (32), with:

(47)

Equation 47

(48)

Equation 48

becomes:

(49)

Equation 49

The Maxwell equations (35), (36), (37), (38), with:

(50) (ga3256)

where e is the electric charge (we assume that the number of electric charges is conserved) become:

(51)

Equation 51

(52)

(53) d . b = 0

(54)

In these equations we find a certain number of physical constants:

(55) h , m , c , G