Entropy generation in curved spaces as a diagnostic for particle creation

Details Entropy generation in curved spaces as a diagnostic for particle creation Entropy generation in curved spaces as a diagnostic for particle creation

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phlb..202..207k&link_type=abstract

Physics Letters B, Volume 202, Issue 2, p. 207-210.

Physics

7

Scientific paper

This paper defines a time-dependent entropy S(t) for a quantum field in a background cosmological spacetime, changes in which are connected directly with changes in the average particle number in each mode. Here the existence of an arrow of time, ds/dt > 0 and d/dt>0, would not reflect the fact that the Universe is expanding, but, instead, the fact that the Universe started from a special state characterized either (a) very nearly by eigenstates of number, such as the vacuum, or (b) more generally, by very nearly random phases.

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