Efficient measurement-device-independent detection of multipartite entanglement structure

Abstract

Witnessing entanglement is crucial in quantum information processing. With properly preparing ancillary states, it has been shown previously that genuine entanglement can be witnessed without trusting measurement devices. In this work, we generalize the scenario and show that generic multipartite entanglement structures, including entanglement of subsystems and entanglement depth, can be witnessed via measurement-device-independent means. As the original measurement-device-independent entanglement witness scheme exploits only one out of four Bell measurement outcomes for each party, a direct generalization to multipartite quantum states will inevitably cause inefficiency in entanglement detection after taking account of statistical fluctuations. To resolve this problem, we also present a way to utilize all the measurement outcomes. The scheme is efficient for multipartite entanglement detection and can be realized with state-of-the-art technologies.

20 pages, 1 figure, comments are welcome

References in corpus (11)

• Quantum Computing
• Entanglement detection
• Multipartite entanglement in spin chains
• The structure of multidimensional entanglement in multipartite systems
• Measurement-Device-Independent Entanglement Witnesses for All Entangled Quantum States
• Four-qubit entanglement from string theory
• The effects of reduced "free will" on Bell-based randomness expansion
• Implementation of a Measurement-Device-Independent Entanglement Witness
• Structural Quantification of Entanglement
• Randomness Requirement on CHSH Bell Test in the Multiple Run Scenario
• Locality, detection efficiencies, and probability polytopes

Cited by in corpus (5)

• Simulating single photons with realistic photon sources
• Design and Experimental Performance of Local Entanglement Witness Operators
• The operational significance of the quantum resource theory of Buscemi nonlocality
• Efficient and robust detection of multipartite Greenberger-Horne-Zeilinger-like states
• Measurement-device-independent Schmidt number certification of all entangled states