Direct estimation of functionals of density operators by local operations and classical communication

Abstract

We present a method of direct estimation of important properties of a shared bipartite quantum state, within the ``distant laboratories'' paradigm, using only local operations and classical communication. We apply this procedure to spectrum estimation of shared states, and locally implementable structural physical approximations to incompletely positive maps. This procedure can also be applied to the estimation of channel capacity and measures of entanglement.

Keywords

PhysicsQuantum entanglementBipartite graphStatistical physicsEstimationQuantumState (computer science)Applied mathematicsAlgorithmTheoretical computer scienceTheoretical physicsQuantum mechanicsComputer scienceMathematics

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Publication Info

Year: 2003
Type: article
Volume: 68
Issue: 3
Citations: 40
Access: Closed

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APA Style

                            
                                
                                    Carolina Alves, 
                                
                                    Paweł Horodecki, 
                                
                                    Daniel K. L. Oi
                                
                                et al.
                            
                            (2003). 
                            Direct estimation of functionals of density operators by local operations and classical communication. 
                            Physical Review A
                            , 68
                            (3)
                            .
                            https://doi.org/10.1103/physreva.68.032306
                        

Identifiers

DOI: 10.1103/physreva.68.032306