Analytic expressions of the generalized discord for three qubits under local noisy channels

Hou, Xi-Wen

doi:10.1016/j.physa.2023.128742

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2024

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Cited by 3 publications

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“…Furthermore, characterizing the dynamics of quantum discord under the influence of noise channels is of great importance in quantum information processing. [45,[47][48][49][50] The quantum discord may tend to decrease at asymptotic time and may be frozen for a time interval, which is due to unavoidable interaction of quantum states with its environment. Freezing plays an important role in some quantum information processing, which can make task execution efficiency unaffected by the environment.…”

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confidence: 99%

Quantum discord and its dynamics for multipartite systems

Luo 罗,

Guo 郭

2024

Chinese Phys. B

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Quantum discord, one of the famous quantum correlations, has been recently generalized to multipartite systems by Radhakrishnan et.al. In this paper, we give analytical solutions of the quantum discord for a family of N-qubit quantum states. For bipartite case, we derive a zero quantum discord which will remain unchanged under the phase damping channel. For larger cases, it is found that the quantum discord can be classified into three categories and the quantum discord for odd-partite systems can exhibit freezing under the phase damping channel, while the freezing doesn't exist in the even-partite systems.

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