Unit transformation of Cosmological Constant ?

[icarus2]

Question : How to unit transformation of Cosmological Constant?

10-47 GeV4 ===> ? eV
or, x eV ===> ? GeV4


1) How compair ( X ) GeV4 with ( Y ) eV ?

2) How compair ( 10-29 g/cm3) with (Y eV)?

please, easely explain to me!
and, have a nice day!

[edgepflow]

Try these conversions. They are a good tool when working with cosmology equations like scalar field inflation models.

Temperature: 1 GeV ---> 10^13 K
Mass: 1 GeV ---> 10^-25 g
Time: 1 GeV^-1 ---> 10^-24 sec
Length: 1 GeV^-1 ---> 10^-14 cm

[icarus2]

Thanks you!
I will try by them.

If reader have a better idea, please write down!

[Amanheis]

You are comparing energies with energydensities. eV is of dimension energy.
But if c=hbar=1 (cosmologists tend to redefine their units like that), lenght and time have the same dimension, that is they are both of dimension energy^-1.

Thus, energy densities (energy/Length^3) have the same dimension as energy^4.

[icarus2]

Thanks Amanheis! good explain!

I have make a challenge to that fine tuning problem(the reason of that mass density of universe close to critical mass density), inflation mechanism(start and end), the reason of that dark energy has a small value, future of our universe, at Physics Forums Blog.

[icarus2]

Try these conversions. They are a good tool when working with cosmology equations like scalar field inflation models.

Temperature: 1 GeV ---> 10^13 K
Mass: 1 GeV ---> 10^-25 g
Time: 1 GeV^-1 ---> 10^-24 sec
Length: 1 GeV^-1 ---> 10^-14 cm

I got a solution