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Entanglement Theory Quantum Correlations Open Quantum Systems Decoherence Quantum Simulation

Tight lower bound to the geometric measure of quantum discord

arXiv
Authors: Ali Saif M. Hassan, Behzad Lari, Pramod S. Joag

Year

2010

Paper ID

10925

Status

Preprint

Abstract Read

~2 min

Abstract Words

105

Citations

N/A

Abstract

Dakic, Vedral and Brukner \[Physical Review Letters \tf{105},190502 (2010)\] gave a geometric measure of quantum discord in a bipartite quantum state as the distance of the state from the closest classical quantum (or zero discord) state and derived an explicit formula for a two qubit state. Further, S.Luo and S.Fu \[Physical Review A \tf{82}, 034302 (2010)\] obtained a generic form of this geometric measure for a general bipartite state and established a lower bound. In this brief report we obtain a rigorous lower bound to the geometric measure of quantum discord in a general bipartite state which dominates that obtained by S.Luo and S.Fu.

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  • This paper contributes to the Quantum Simulation research area in the Quantum Articles archive.
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  • Dakic, Vedral and Brukner [Physical Review Letters tf105,190502 (2010)] gave a geometric measure of quantum discord in a bipartite quantum state as the distance of the state...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1010.1920 [2] arXiv https://arxiv.org/abs/1010.1920 [3] Publisher https://arxiv.org/abs/1010.1920

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