18
[28], p. 320:
“But there remains the urgent question of the absolute value of this energy density, as well as those of the other quantum fields, and the question  of the variability of these energy densities at a metric of the universe that varies with time. Now, as before, there is not even a trace of an answer."
[30], p. 98:
„If we reject the possibility that the cosmological constant is only by accidence infinitesimally small, then we must accept radical consequences for physics.”
Before we can find an approach for the solution of this problem at all, we must clarify how the vacuum energy density is calculated from the quantum field theory [31], p. 128:
“In the equation of the available quantum field theory, the energy density diverges (ultra violet divergence), i. e. the integral over all wave numbers k diverges.
Therefore, the k space is cut off at an energy scale  Ex @ 10 19 GeV,i. e. at the Planck scale (tPL » 10 - 43 s). From this follows rvac» 10 92 gcm -3.
On the other hand, from observations results that rvac< »rcrit = 2 . 10 -29 gcm -3 .
With this, there results a discrepancy of 120 powers of ten."
According to the CTH, neither the vacuum energy density, nor the cosmological constant are really constant, but are values depending on time [9], also see Fig. 3:
ev ~ t -2 , L ~ t - 4/3 ).
This, by the way, also is in accordance with newer investigations by  Overduin, Wesson and Bowyer concerning the behaviour of the vacuum energy density in the expanding universe [32], p. 135:
“They reach the conclusion that the vacuum suffers deterioration at the expansion of the cosmos, and that the vacuum energy density  in the expanding cosmos decreases systematically with the world time.”
If we now calculate the vacuum energy density by means of the CTH at the Planck time  ( tPL » 10 -43 s)
- (the conventional calculation method cuts the diverging series off  at this point) and relate it to toady’s vacuum energy density (t1 » 10 17 s), then we receive the surprising result:

eV PL/eV1»  10 120
(The exact calculation using  t PL = 5.4 . 10 - 44 s and t1 = 4.7 . 10 17 s leads to a slightly larger value, namely
eV PL/eV1 = 10 122 ).
The calculation of the cosmological constant by means of the CTH also leads to a value that is in accordance with the observation [9]:
L = 1/R 2  » 10 -53 m -2  ( R » 1.5 . 10 26 m ).
 
 
18