Re: Travelling to a different universe

From: scerir <>
Date: Wed, 26 Dec 2001 17:05:58 +0200

> Saibal Mitra
> Now there exists a class of universes,
> with a very low measure, in which the
> laws of physics are such that I am
> guaranteed to win.

There is also the interesting class of TSQT.

Quantum theory is time symmetric as long as it can be
described by the evolution of a state vector according
to the Schroedinger equation. But as soon as measurement
and wave function collapse are involved, the symmetry
breaks down.

But in the Time Symmetrized Quantum Theory (TSQT) it is
argued that information propagating in a time reversed
direction from future measurements can provide
information about appropriately selected systems (!!!).
Ensembles of such sustems are referred to as
"pre-selected" and "post-selected".

The basic claim of TSQT is that a fundamental time symmetry
applies to the interval between two ideal measurements.

According to TSQT the quantum state of a system,
between two measurements occurring at times t1 and t2,
contains information based not only on the initial
measurement (pre-selection) but also on the final
measurement (post-selection).

Aharonov, Bergman and Lebowitz (ABL) invented the
well-known time symmetric formalism for describing
quantum systems between two complete measurements.

Does TSQT ensures or forbids your win?


Received on Wed Dec 26 2001 - 08:08:47 PST

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