We will say that the field is of an ``essentially RPA'' type if:

- The phase factors are statistically independent and uniformly
distributed variables up to
corrections, i.e.
(17)

where(18)

is the -mode*amplitude*PDF. - The amplitude variables are almost independent is a sense that for
each modes the -mode amplitude PDF is equal to the
product of the one-mode PDF's up to and
corrections,
(19)

Dr Yuri V Lvov 2007-01-23