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Robustness of entanglement for Bell decomposable states

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Abstract.

We propose a simple geometrical approach for finding robustness of entanglement for Bell decomposable states of two-qubit quantum systems. It is shown that for these states robustness is equal to the concurrence. We also present an analytical expression for two separable states that wipe out all entanglement of these states. Random robustness of these states is also obtained. We also obtain robustness of a class of states obtained from Bell decomposable states via some special local operations and classical communications (LOCC).

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Authors and Affiliations

  1. Department of Theoretical Physics and Astrophysics, Tabriz University, 51666, Tabriz, Iran

    S. J. Akhtarshenas & M. A. Jafarizadeh

  2. Institute for Studies in Theoretical Physics and Mathematics, 19395-1795, Tehran, Iran

    S. J. Akhtarshenas & M. A. Jafarizadeh

  3. Research Institute for Fundamental Sciences, 51666, Tabriz, Iran

    S. J. Akhtarshenas & M. A. Jafarizadeh

Authors
  1. S. J. Akhtarshenas
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  2. M. A. Jafarizadeh
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Corresponding author

Correspondence to S. J. Akhtarshenas.

Additional information

Received: 28 October 2002, Published online: 5 August 2003

PACS:

03.65.Ud Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)

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Akhtarshenas, S.J., Jafarizadeh, M.A. Robustness of entanglement for Bell decomposable states. Eur. Phys. J. D 25, 293–298 (2003). https://doi.org/10.1140/epjd/e2003-00243-1

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  • DOI: https://doi.org/10.1140/epjd/e2003-00243-1

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