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Comment on “Groverian entanglement measure and evolution of entanglement in search algorithm for n(= 3, 5)-qubit systems with real coefficients” (volume 6, number 4, August 2007), by Arti Chamoli and C. M. Bhandari

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Abstract

We point out that the main results—the analytic expressions for the Groverian measure of entanglement, in the above mentioned paper are erroneous. The technical mistake of the paper is discussed. It is shown by an explicit example that the formula for calculating the Groverian measure yields \({G(|\psi\rangle)=0}\) for some entangled states.

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References

  1. Chamoli A., Bhandari C.M.: Groverian entanglement measure and evolution of entanglement in search algorithm for n(=3, 5)-qubit systems with real coefficients. Quantum Inf. Process. 6(4), 255–271 (2007)

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Authors and Affiliations

  1. Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 B T Road, Kolkata, 700 108, India

    Preeti Parashar & Swapan Rana

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  1. Preeti Parashar
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  2. Swapan Rana
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Correspondence to Preeti Parashar.

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Parashar, P., Rana, S. Comment on “Groverian entanglement measure and evolution of entanglement in search algorithm for n(= 3, 5)-qubit systems with real coefficients” (volume 6, number 4, August 2007), by Arti Chamoli and C. M. Bhandari. Quantum Inf Process 8, 357–360 (2009). https://doi.org/10.1007/s11128-009-0122-0

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  • DOI: https://doi.org/10.1007/s11128-009-0122-0

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