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quant-ph2011★ 5 cited
Nullity of quantum discord of two-qubit X-state systems
Gao-xiang Li, Zhen Yi, Zbigniew Ficek
The conditions are established for nullity of quantum discord for mixed states of a general two-qubit system whose dynamical behaviour is given by an X-state form density matrix. I…
quant-ph2010★ 13 cited
Continuous variables approach to entanglement creation and processing
Li-hui Sun, Gao-xiang Li, Zbigniew Ficek
We apply the continuous variable approach to study entangled dynamics of coupled harmonic oscillators interacting with a thermal reservoir and to a deterministic creation of entang…