```X-Message-Number: 23398
From:  var s1 = "Azt28"; var s2 = "aol.com"; var s3 = s1 + "@" + s2; document.write("<a href='mailto:" + s3 + "'>" + s3 + "</a>");
Date: Sat, 7 Feb 2004 11:59:27 EST
Subject: Re: CryoNet #23389  changing the past & survival

> From:  var s1 = "Ettinger"; var s2 = "aol.com"; var s3 = s1 + "@" + s2; document.write("<a href='mailto:" + s3 + "'>" + s3 + "</a>");
>
> Mike Perry notes that, according to certain theorists, the past is
> ambiguous.
> (Also the present, as well as the future.) This might also be interpreted to
>
> mean that we can change the past. (When I was a boy, I asked whether God
> could
> change the past.)
>
I think a safe bet is that we can only act in the present.
Now what is the present? The infinitely thin time slice between past and
future?
It may be the right definition in classical physics.
In quantum theory, the uncertainty principle gives some duration to the
present.
For example, we are built from chemical structures with energy binding in the
electron-volt range. The uncertainty for such an energy is in the

millionth-billionth (10^-15)of a second, this is the time duration of our
present.

Submarines communicate with ELF radio-waves, using photons with frequencies
down to 10 kHz. They have a present duration in the tens of microseconds. In
space, waves with present duration extending in the hour domain may be present
or even more if you take into account nonlinear process.

Assume we use an ELF wave with both, right and left circular polarization. We
could squeeze one polarization and so reduce its present duration if we, at
the same time, blur the other polarization, giving it a longer present.  If we
squeeze one polarization by a factor near one billion, that wave will looks as
an optical light. The other polarization will have a 3 hours long present. We
would have a 3 hours long window to act on a chemical reaction for example...

What if the not squeezed wave has an hour long present? Squeezing one

polarization down to the optical domain would expand the other to 10 ^18 hours
or 100
times the estimated age of the Big Bang.

Strong squeezing on low frequency radio-waves could so open a present able to
encompass any epoch we could be interested in.

Yvan Bozzonetti.

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