BGU Physics Department
Colloquium, Jan. 6, 2011
The past of a quantum
particle in our many-worlds universe
Tel Aviv University
I will argue that if we want to believe that physics of today can
explain everything, we have to accept existence of parallel worlds in
our Universe. I will explain how to see an object without light and why
an attempt to prove, without light, that an object is absent, fails.
This will demonstrate that Wheeler's approach to the past of a quantum
particles does not explain the weak trace it leaves and that the proper
description of the past of a quantum particles requires addition of a
quantum state evolving backward in time.