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MiS Preprint Repository

Delve into the future of research at MiS with our preprint repository. Our scientists are making groundbreaking discoveries and sharing their latest findings before they are published. Explore repository to stay up-to-date on the newest developments and breakthroughs.

MiS Preprint
4/2011

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

Bo Li, Zhi-Xi Wang and Shao-Ming Fei

Abstract

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 decoherence. Our results include the ones in [Phys. Rev. Lett. 105. 150501] as a special case and show new pictures and structures of quantum discord.

Received:
Feb 1, 2011
Published:
Feb 2, 2011
PACS:
03.67.Mn, 03.65.Ud, 03.65.Yz

Related publications

inJournal
2011 Repository Open Access
Bo Li, Zhi-Xi Wang and Shao-Ming Fei

Quantum discord and geometry for a class of two-qubit states

In: Physical review / A, 83 (2011) 2, p. 022321