Experimental verification of multidimensional quantum steering

Che Ming Li*, Hsin Pin Lo, Liang Yu Chen, Atsushi Yabushita

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


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.

Original languageEnglish
Pages (from-to)956-960
Number of pages5
JournalOptics Communications
StatePublished - 1 Mar 2018


  • Entangled photons
  • Quantum steering
  • Spontaneous parametric down-conversion process


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