Will entropy decrease if the Universe recollapses\?

Details Will entropy decrease if the Universe recollapses\? Will entropy decrease if the Universe recollapses\?

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phrvd..32.2496p&link_type=abstract

Physical Review D (Particles and Fields), Volume 32, Issue 10, 15 November 1985, pp.2496-2499

Mathematics

Logic

73

Nonequilibrium And Irreversible Thermodynamics, Origin And Formation Of The Universe

Scientific paper

Hawking has proposed a wave function for the Universe which is CPT invariant and which appears to be dominated by smooth configurations when the Universe is small but by irregular configurations when large. He has argued that this behavior connects the thermodynamic arrow of time with the cosmological arrow. Here it is pointed out that although the total wave function may have the properties Hawking describes, an individual WKB component of it that is classically observable generically will not be CPT invariant and will not have its thermodynamic arrow of time reverse if it enters a recollapsing phase.

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