• Operational criterion for controlled dense coding with non-trivial tripartite entangled states

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      https://www.ias.ac.in/article/fulltext/pram/091/04/0050

    • Keywords

       

      Greenberger–Horne–Zeilinger-states; W-states; partially entangled states; maximal sliced states; symmetric states; controlled dense coding

    • Abstract

       

      In this paper, we provide an operational criterion for controlled dense coding (CDC) with a general class of three-qubit partially entangled states. A general three-qubit pure entangled state can be classified into two inequivalent classes according to their genuine tripartite entanglement. We claim that if a three-qubit state shows entanglement characteristic similar to Greenberger–Horne–Zeilinger (GHZ)-class, then such non-trivial tripartitestates are useful in CDC whereas states belonging to the W-class are not useful for that. We start with a particularclass of non-trivial partially entangled states belonging to the GHZ-class and show that they are effective in CDC. Then we cite several other examples of different types of tripartite entangled states to support our conjecture.

    • Author Affiliations

       

      SOVIK ROY1 BIPLAB GHOSH2 MD MANIRUL ALI3

      1. Department of Mathematics, Techno India, EM 4/1, Salt Lake, Kolkata 700 091, India
      2. Department of Physics, Vivekananda College for Women, Barisha, Kolkata 700 008, India
      3. Physics Division, National Center forTheoretical Sciences, National Tsing Hua University, Hsinchu 30013,Taiwan
    • Dates

       
  • Pramana – Journal of Physics | News

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