Distribution of non-Markovian intervals for open qubit systems |
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Authors: | Zheng Yan-Ping Tang Ning rm Wang Guo-You and Zeng Hao-Sheng |
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Institution: | Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081, China |
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Abstract: | We study the non-Markovianity of open qubit systems using the measure N proposed by Breuer, Laine and Piilo Phys. Rev. Lett. 103 210401 (2009)]. We find that for the three types of quantum noises, amplitude-damping, dephasing and depolarizing noises, there exist some non-Markovian time intervals whose distribution is independent of the selection of the pair of initial states. Therefore, the maximization in the definition of measure N can be actually removed without influencing the detection of non-Markovianity. |
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Keywords: | open quantum system non-Markovianity non-Markovian interval |
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