Entropy, (ir)reversibility etc. are concepts that only appear in an
effective description where you have integrated out the microscopic
dynamics of the system to obtain effective laws of physics in terms of
only macroscopic quantities. In addition to the macroscopic quantities a
few statistical quantities like entropy, temperature etc. will then
appear, they take into account the statistical effect of the microscopic
degrees of freedom. The description is then valid under the assumption
of thermal equilibrium (or local thermal equilibrium).
The exact laws of physics do conserve information, so the present state
of the universe will simply continue to exist until eternity. Time
evolution only scrambles the present state, but all the information in
it will still be in there. E.g. 100 years from now, the present moment
you are experiencing right now will exist physically in a sphere with a
radius of 100 lightyears. Now, other observers in that sphere will cause
that state to effectively collapse from their point of view, so your
present moment won't in practice be accessible to them. However, from
your point of view (as you exist right now) this doesn't matter, because
they will exist in a superposition (entangled with the rest of the
universe) of all possible measurement outcomes, which is then simply the
time evolved state without collapse which preserves information.
This then means that your present moment right now is an eternal,
timeless physical quantity. So, you can just as well take the view that
you already exist in the year 2119 in a scrambled form, distributed over
a sphere with a radius of 100 lightyears and you then subjectively
experience the 100 year old world of 2019 which also exists in a
scrambled form.
Saibal
On 21-06-2019 18:27, Eva wrote:
Given that time is irreversible, and global entropy always increase:
1. In principle, sooner or later, every living system such as human
being, or humanity will be annihilated?
2. In principle, if system is annihilated then it is irreversible - a
system with the same internal structure may be created, but it will
not be the very same system, it may be (at most) perfectly isomorphic,
but it will not share the same identity?
So, for example, if I die, and hypothetically, in the distant future,
an exact copy of my body will be made than it will be an exact copy of
my body and consciousness, but not my current identity, so my
consciousness will not reappear after my death like from deep sleep.
I would like to ask you - in your opinion, my two above conclusions are
correct?
I'm sorry for bothering you with this question, I have encountered
statements that every situation, and every particular life, return
endlessly because the time is infinite, but the number of possibile
configurations of atoms is finite. This idea is terrible. I don't want
repeat my life forever :(
Some people also talk about "eternal return" in the context of 4D
block universe theory where every situation is timless.
P.S.
I've previously made a similar topic in context of Peter Rowlands
"Zero-totality"
works but it did not appeared after sending :(
--
You received this message because you are subscribed to the Google Groups
"Everything List" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/everything-list/05e6deefebd19a1edc8c79b8d17e31f7%40zonnet.nl.
