Concurrence via entanglement witnesses

Abstract

We derive an experimentally observable lower bound on concurrence of mixed quantum states in terms of an entanglement witness, relating measurements on single states with those on two copies.

References in corpus (5)

• Scalable multi-particle entanglement of trapped ions
• Concurrence of arbitrary dimensional bipartite quantum states
• Quantifying Entanglement with Witness Operators
• Estimating entanglement measures in experiments
• Estimating entanglement of unknown states

Cited by in corpus (8)

• Entanglement detection
• Unifying several separability conditions using the covariance matrix criterion
• Further results on entanglement detection and quantification from the correlation matrix criterion
• Observable estimation of entanglement for arbitrary finite-dimensional mixed states
• Lower bounds on entanglement measures from incomplete information
• Novel Schemes for Directly Measuring Entanglement of General States
• Entanglement measures as physical observables
• Beyond the standard entropic inequalities: stronger scalar separability criteria and their applications