... ordinary field
theory. It is therefore worth exploring the differences between string the-
ory and field theory in the context of black hole paradoxes. Quite apart
from the question of the ultimate ... string the-
ory, there are important lessons to be drawn from the differences between
these two theories. As we shall see, although string theory is usually well
approximated by local...
... between the two presidents and that therefore, without
further ado, the light it emitted traveled the same distance to reach each of them. Since the speed of the emitted light to the left and
to the ... place.
The State of String Theory
The central concern of this book is to explain the workings of the universe according to string theory, with a primary emphasis on...
... (Lemaitre Universe) .
1.6 The Matter Density in the Universe
From the discussion at the end of the previous chapter it is evident that
the fate of the Universe at late times (p = 0) is dictated by the ... Einstein’s General
Theory of Relativity (GR) [2] and the dominant role of gravity in the evolu-
tion of the Universe. The discovery of the Expansion of the...
... comes from the
growth of ¸ in the t't
period; the last factor comes from trivial redshift due to the expansion of
the Universe. ¹
is the temperature of the Universe when the #uid becomes ... 163} 266 163
In the above, the "rst factor comes from the growth of the correlation length in the time interval
0(t(t
when eddy decay is faster than the Un...
... considerations, the general
physical principle known as the second law of thermo-
dynamics predicts that there can be but one end to the
universe a "heat-death" in which the total energy of the
universe ... because
the earth receives exactly the right amount of radiation
from the sun; upset the balance in either direction, of
excess or defect, and life must disa...
... to scowl at the
view tank. Together, they contemplated the forming
scene.
The Admiral's outburst had given subject matter
guidance to the computer. The display shifted to
the Planet ... loaded into the
recon-patroller's computer as authenticator for the
mission and demolition and laser gun settings. The
computer adjusted thrust and vector to bring the
ship...