## Quantum discord for two-qubit systems in the Bloch channel: effects of longitudinal and transversal relaxation times

- Ikumi Kondo, Masashi Ban
- Quantum Information Processing
- 2017

Highly Influential

- Published 2017 in Quantum Information Processing
DOI:10.1007/s11128-017-1701-0

For the XXZ subclass of symmetric two-qubit X states, we study the behavior of quantum conditional entropy Scond as a function of measurement angle θ ∈ [0, π/2]. Numerical calculations show that the function Scond(θ) for X states can have at most one local extremum in the open interval from zero to π/2 (unimodality property). If the extremum is a minimum… CONTINUE READING

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