**From:** Damien Broderick (*thespike@satx.rr.com*)

**Date:** Sat Jan 21 2006 - 21:12:38 MST

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Quantum Physics, abstract

Time-reversal formalism applied to maximal bipartite entanglement:

Theoretical and experimental exploration

http://arxiv.org/abs/quant-ph/0510048

Authors:

<http://arxiv.org/abs/quant-ph//find/quant-ph/1/au:+Laforest_M/0/1/0/all/0/1>M.

Laforest,

<http://arxiv.org/abs/quant-ph//find/quant-ph/1/au:+Laflamme_R/0/1/0/all/0/1>R.

Laflamme,

<http://arxiv.org/abs/quant-ph//find/quant-ph/1/au:+Baugh_J/0/1/0/all/0/1>J.

Baugh

Comments: 10 pages, 16 figurers, submitted to PRA

Within the context of quantum teleportation, a proposed intuitive model to

explain bipartite entanglement describes the scheme as being the same qubit

of information evolving along and against the flow of time of an external

observer. We investigate the physicality of such a model by applying the

time-reversal of the Schrodinger equation in the teleportation context. To

do so, we first lay down the theory of time-reversal applied to the circuit

model and then show that the outcome of a teleportation-like circuit is

consistent with the usual tensor product treatment, thus independent of the

physical quantum system used to encode the information. Finally, we

demonstrate a proof of principle experiment on a liquid state NMR quantum

information processor. The experimental results are consistent with the

interpretation that information can be seen as flowing backward in time

through entanglement.

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