Relative information encoded in the degree of entanglement to discriminate bipartite states

Details Relative information encoded in the degree of entanglement to discriminate bipartite states Relative information encoded in the degree of entanglement to discriminate bipartite states

2006-04-12

arxiv.org/abs/quant-ph/0604088v1

Physics

Quantum Physics

10 pages, no figures. Accepted in Physics Letters A

Scientific paper

10.1016/j.physleta.2006.04.031

It has been recently shown (Bartlett et al. 2003) that information encoded into relative degrees of freedom enables communication without a common reference frame using entangled bipartite states. In this case the relative information stored in the two-qubit system is shared between the polarization degrees of freedom and the degree of entanglement. In the present article a specific state discrimination problem is envisioned where the degree of entanglement carries the only relative parameter, so that certain maximally entangled states are perfectly distinguishable, while discrimination of product states is impossible.

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