Experimental verification of multidimensional quantum steering

OPTICS COMMUNICATIONS

卷:410

Article

Li, Che-Ming¹  Lo, Hsin-Pin²  Chen, Liang-Yu¹  Yabushita, Atsushi² 

[1] Natl Cheng Kung Univ, Dept Engn Sci, Tainan 701, Taiwan

[2] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 300, Taiwan

关键词: Quantum steering;    Entangled photons;    Spontaneous parametric down-conversion process;   

DOI  :  10.1016/j.optcom.2017.11.070

来源: Elsevier

【 摘 要 】

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.. 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. (c) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free