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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/059/02/0263-0267

    • Keywords

       

      Cloning; coherent states

    • Abstract

       

      We show that in the case of unknown harmonic oscillator coherent states it is possible to achieve what we call perfect information cloning. By this we mean that it is still possible to make arbitrary number of copies of a state which has exactly the same information content as the original unknown coherent state. By making use of this perfect information cloning it would be possible to estimate the original state through measurements and make arbitrary number of copies of the estimator. We define the notion of a measurement fidelity and calculate it for our case as well as for the Gaussian cloners.

    • Author Affiliations

       

      N D Hari Dass1 Pradeep Ganesh1 2

      1. Institute of Mathematical Sciences, C.I.T. Campus, Chennai - 600 113, India
      2. Indian Institute of Technology, Chennai - 600 113, India
    • Dates

       
  • Pramana – Journal of Physics | News

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