Experimental verification of multidimensional quantum steering

Abstract

Quantum steering enables one party to communicate with another remote party even if the sender is untrusted. Such characteristics of quantum systems not only provide direct applications to quantum information science, but are also conceptually important for distinguishing between quantum and classical resources. While concrete illustrations of steering have been shown in several experiments, quantum steering has not been certified for higher dimensional systems. Here, we introduce a simple method to experimentally certify two different kinds of quantum steering: Einstein-Podolsky-Rosen (EPR) steering and single-system (SS) steering (i.e., temporal steering), for dimensionality (d) up to d=16. The former reveals the steerability among bipartite systems, whereas the latter manifests itself in single quantum objects. We use multidimensional steering witnesses to verify EPR steering of polarization-entangled pairs and SS steering of single photons. The ratios between the measured witnesses and the maximum values achieved by classical mimicries are observed to increase with $d$ for both EPR and SS steering. The designed scenario offers a new method to study further the genuine multipartite steering of large dimensionality and potential uses in quantum information processing.

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Cited by in corpus (6)

• Deterministic distribution of multipartite entanglement and steering in a quantum network by separable states
• One-sided Device-independent Self-testing of any Pure Two-qubit Entangled State
• Quantum steering inequality with tolerance for measurement-setting-errors: experimentally feasible signature of unbounded violation
• Experimental demonstration of one-sided device-independent self-testing of any pure two-qubit entangled state
• Robust genuine high-dimensional steering with many measurements
• Semidefinite relaxations for high-dimensional entanglement in the steering scenario