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Revealing genuine steering under sequential measurement scenario

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Abstract

Genuine steering is still not well understood enough in contrast to genuine entanglement and nonlocality. Here, we provide a protocol which can reveal genuine steering under some restricted operations compared to the existing witnesses of genuine multipartite steering. Our method has an impression of some sort of ‘hidden’ protocol in the same spirit of hidden nonlocality, which is well understood in bipartite scenario. We also introduce a genuine steering measure which indicates the enhancement of genuine steering in the final state of our protocol compared to the initial states.

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Acknowledgements

We would like to thank Prof. Guruprasad Kar for useful discussions. We would like to thank Debarshi Das for useful advices. SSB is supported by the John Templeton Foundation through grant 60609, Quantum Causal Structures. The opinions expressed in this publication are those of the authors and do not necessarily reflect the views of the John Templeton Foundation.

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Authors and Affiliations

  1. S.N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata, 700098, India

    Amit Mukherjee & Arup Roy

  2. Department of Computer Science, The University of Hong Kong, Pokfulam Road, Hong Kong, China

    Some Sankar Bhattacharya

  3. Department of Mathematics, South Malda College, Malda, West Bengal, India

    Biswajit Paul

  4. Department of Mathematics, Government Girls’ General Degree College, Ekbalpore, Kolkata, India

    Kaushiki Mukherjee

  5. Department of Applied Mathematics, University of Calcutta, 92, A.P.C. Road, Kolkata, 700009, India

    Debasis Sarkar

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  1. Amit Mukherjee
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  3. Some Sankar Bhattacharya
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Correspondence to Arup Roy.

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Mukherjee, A., Roy, A., Bhattacharya, S.S. et al. Revealing genuine steering under sequential measurement scenario. Quantum Inf Process 19, 143 (2020). https://doi.org/10.1007/s11128-020-02633-5

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