COSMOLOGICAL MEASURES WITH VOLUME AVERAGING
2011 ◽
Vol 01
◽
pp. 80-89
◽
Keyword(s):
It has been common for cosmologists to advocate volume weighting for the cosmological measure problem, weighting spatial hypersurfaces by their volume. However, this often leads to the Boltzmann brain problem, that almost all observations would be by momentary Boltzmann brains that arise very briefly as quantum fluctuations in the late universe when it has expanded to a huge size, so that our observations (too ordered for Boltzmann brains) would be highly atypical and unlikely. Here it is suggested that volume weighting may be a mistake. Volume averaging is advocated as an alternative. One consequence may be a loss of the argument that eternal inflation gives a nonzero probability that our universe now has infinite volume.
2010 ◽
Vol 2010
(09)
◽
pp. 008-008
◽
1988 ◽
Vol 03
(03)
◽
pp. 617-629
◽
Keyword(s):
1977 ◽
Vol 35
◽
pp. 590-591
Keyword(s):
1983 ◽
Vol 41
◽
pp. 70-71
1977 ◽
Vol 35
◽
pp. 68-69
Keyword(s):
1976 ◽
Vol 34
◽
pp. 218-219
Keyword(s):
1985 ◽
Vol 43
◽
pp. 348-349
1990 ◽
Vol 48
(3)
◽
pp. 14-15