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    • Keywords


      Likelihood theory; quantum state discrimination; IBM quantum computer; quantum advantage

    • Abstract


      By repeated trials, one can determine the fairness of a classical coin with a confidence which grows with the number of trials. A quantum coin can be in a superposition of heads and tails and its state is most generally a density matrix. Given a string of qubits representing a series of trials, one can measure them individually and determine the state with a certain confidence.We show that there is an improved strategy which measures the qubits after entangling them, which leads to a greater confidence. This strategy is demonstrated on the simulation facility of IBM quantum computers.

    • Author Affiliations



      1. C.R. Rao Advanced Institute of Mathematics, Statistics and Computer Science, University of Hyderabad Campus, Prof. C.R. Rao Road, Gachibowli, Hyderabad 500 046, India
      2. Raman Research Institute, Sadashivanagar, Near Mekhri Circle, Bengaluru 560 080, India
      3. International Centre for Theoretical Sciences, Tata Institute of Fundamental Research, Shivakote, Bengaluru 560 089, India
    • Dates

    • Supplementary Material

  • Pramana – Journal of Physics | News

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