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MiS Preprint
53/2012

Improved bounds on negativity of superpositions

Zhi-Hao Ma, Zhi-Hua Chen, Shuai Han, Shao-Ming Fei and Simone Severini

Abstract

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.

Received:
Aug 17, 2012
Published:
Aug 20, 2012
Keywords:
superpostions, pure states, negativity

Related publications

inJournal
2012 Repository Open Access
Zhi-Hao Ma, Zhi-Hua Chen, Shuai Han, Shao-Ming Fei and Simone Severini

Improved bounds on negativity of superpositions

In: Quantum information and computation, 12 (2012) 11/12, pp. 0983-0988