Experimental Determination of Entanglement for Arbitrary Pure States

Abstract

We present a way of experimentally determining the concurrence in terms of the expectation values of local observables for arbitrary multipartite pure states. In stead of the joint measurements on two copies of a state in the experiment for two-qubit systems [S. P. Walborn et al. Nature (London)440, 20(2006)], we only need one copy of the state in every measurement for any arbitrary dimensional multipartite systems, avoiding the preparation of twin states or the imperfect copy of the state.

6 pages

References in corpus (8)

• Concurrence of arbitrary dimensional bipartite quantum states
• Optimal entanglement criterion for mixed quantum states
• Lower bounds on concurrence and separability conditions
• Optimal entanglement witnesses based on local orthogonal observables
• Measuring Multipartite Concurrence with a Single Factorizable Observable
• Separability criteria and bounds for entanglement measures
• Concurrence and a proper monogamy inequality for arbitrary quantum states
• Lower Bounds of Concurrence for Tripartite Quantum Systems

Cited by in corpus (11)

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• Quantum Entanglement: Separability, Measure, Fidelity of Teleportation and Distillation
• Identification of three-qubit entanglement
• Quantifying geometric measure of entanglement by mean value of spin and spin correlations for pure and mixed states
• Inequalities Detecting Quantum Entanglement for $2\otimes d$ Systems
• Toward experimental determination of spin entanglement of nucleon pairs
• Detection of bound entanglement in continuous variable systems
• Method for measuring the entanglement of formation for arbitrary-dimensional pure states
• Entanglement Detection and Distillation for Arbitrary Bipartite Systems
• Optimal observables to determine entanglement of a two qubit state
• Measurable lower bounds on concurrence