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Quantum Information and Computation     ISSN: 1533-7146      published since 2001
Vol.12 No.11&12  November 2012

Improved bounds on negativity of superpositions (pp0983-0988)
          
Zhi-Hao Ma, Zhi-Hua Chen, Shuai Han, Shao-Ming Fei, and Simone Severini
         
doi: https://doi.org/10.26421/QIC12.11-12-6

Abstracts: We consider an alternative formula for the negativity based on a simple generalization of the concurrence. We use the formula to bound the amount of entanglement in a superposition of two bipartite pure states of arbitrary dimension. Various examples indicate that our bounds are tighter than the previously known results.
Key words: Superpositions, Pure states, Negativity

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