How Does Time Ordering Work in Quantum Mechanics?

[limarodessa]

It is shocking paper:

http://arxiv.org/abs/quant-ph/0402127

Quantum Entanglement in Time

Caslav Brukner, Samuel Taylor, Sancho Cheung, and Vlatko Vedral,

The temporal Bell inequalities are derived from the assumptions of realism and locality in time.
It is shown that quantum mechanics violates these inequalities and thus is in conflict with the two
assumptions. This can be used for performing certain tasks that are not possible classically. Our
results open up a possibility for introducing the notion of entanglement in time in quantum physics

 

[DrChinese]

OK, I'll bite: what is the shocking part? Brukner is a top researcher and he is a regular contributor to the literature. So this is mainstream work. (Of course, most of that is amazing to me in its own right.) But I am guessing you are fascinated by a particular point, and was hoping you might share for the sake of continued discussion.

 

[limarodessa]

OK, I'll bite: what is the shocking part? Brukner is a top researcher and he is a regular contributor to the literature. So this is mainstream work. (Of course, most of that is amazing to me in its own right.) But I am guessing you are fascinated by a particular point, and was hoping you might share for the sake of continued discussion.

Shocking - in good sense (meaning)

It is extremely interesting

 

[limarodessa]

Also interesting:

http://arxiv.org/abs/quant-ph/0312179

Quantum time ordering and degeneracy. I: Time ordering in quantum mechanics
Authors: J. H. McGuire, A. L. Godunov, Kh. Kh. Shakov, Kh. Yu. Rakhimov, A. Chalastaras
(Submitted on 21 Dec 2003)
Abstract: We examine how time ordering works in quantum mechanics and in classical mechanics.