I found this paper interesting enough to warrant a new topic. From the paper:
We propose a reformulation of quantum mechanics in which the distinction between definite and indefinite becomes the fundamental primitive. Inspired by suggestions of Heisenberg, Schrodinger and Dyson that the past can’t be described in terms of wave functions and operators, so that the uncertainty principle does not apply to past events, we propose that the distinction between past, present and future is derivative of the fundamental distinction between indefinite and definite.
- . . . We do not need a human observer to make quantum mechanics work. All we need is a point of reference, to separate past from future, to separate what has happened from what may happen, to separate facts from probabilities . . . .*
We find the following analogy helpful: perhaps an observer in the present moment
feels no passage of time, the same way a free falling observer feels no gravity. So we
began wondering if we could transform ourselves into the rest frame of a present moment
observer, who would see themselves always at the origin of the time coordinate.
From neuroscience we know that it is possible that - with respect to the universe’s time
- we live in the past and there is no present There is only the past and the future.
It is also possible to define the present as the moment our consciousness becomes aware of the past. This paper is then an attempt to invent a setting within which these thoughts of Heisenberg, Schrodinger and Dyson may make sense.