Quantum Discord and Geometry for a Class of Two-qubit States

By Bo Li, Zhixi Wang, S. Fei. 2011

187 citations recorded by the source corpus.

We study the level surfaces of quantum discord for a class of two-qubit states with parallel nonzero Bloch vectors. The dynamic behavior of quantum discord under decoherence is investigated. It is shown that a class of X states has sudden transition between classical and quantum correlations under decoherence. Our results include the ones in M. D. Lang and C. M. Caves [Phys. Rev. Lett. 105, 150501 (2010)] as a special case and show new pictures and structures of quantum discord.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/bc04cd70467de1a77731f8047fbd1692c403b311

How researchers see this paper

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In Artificial Intelligence

1. Kavan Modi
2. Tomasz Paterek
3. H. Cable
4. Aharon Brodutch
5. Vlatko Vedral

In Atomic and Molecular Physics, and Optics

1. Kavan Modi
2. Tomasz Paterek
3. H. Cable
4. Aharon Brodutch
5. Vlatko Vedral

Citations in the corpus

• The classical-quantum boundary for correlations: Discord and related measures (2011, background): “(Li et al., 2011a; Song et al., 2011) explore extensions to a larger family of initial two-qubit X-states in Eq.”