On quantum non-signalling boxes

Details On quantum non-signalling boxes On quantum non-signalling boxes

2005-05-14

arxiv.org/abs/quant-ph/0505110v1

Phys. Rev. A 74, 012305 (2006)

Physics

Quantum Physics

18 pages, 7 figures, revtex4

Scientific paper

10.1103/PhysRevA.74.012305

A classical non-signalling (or causal) box is an operation on classical bipartite input with classical bipartite output such that no signal can be sent from a party to the other through the use of the box. The quantum counterpart of such boxes, i.e. completely positive trace-preserving maps on bipartite states, though studied in literature, have been investigated less intensively than classical boxes. We present here some results and remarks about such maps. In particular, we analyze: the relations among properties as causality, non-locality and entanglement; the connection between causal and entanglement breaking maps; the characterization of causal maps in terms of the classification of states with fixed reductions. We also provide new proofs of the fact that every non-product unitary transformation is not causal, as well as for the equivalence of the so-called semicausality and semilocalizability properties.

Affiliated with

Also associated with

No associations

Rating

On quantum non-signalling boxes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On quantum non-signalling boxes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On quantum non-signalling boxes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-683033