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arXiv 1901.06911quant-ph
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有耗散的三态Landau-Zener模型

Three-state Landau-Zener model in the presence of dissipation

Benedetto Militello

摘要:

研究了三态系统中基于绝热演化的粒子数转移问题。结合相关参数分析了该过程的效率,揭示了耦合常数的相位的重要作用。耗散的作用也被考虑在内,专注于外部衰变,可以描述有效的非厄米哈密顿。虽然人口转移原来是相当敏感的衰变过程中,非常大的衰变率的发生的一个Zeno现象允许恢复一个非常高的效率。

英文摘要:

A population transfer based on adiabatic evolutions in a three-state system undergoing an avoided crossing is considered. The efficiency of the process is analyzed in connection with the relevant parameters, bringing to light an important role of the phases of the coupling constants. The role of dissipation is also taken into account, focusing on external decays that can be described by effective non-Hermitian Hamiltonians. Though the population transfer turns out to be quite sensitive to the decay processes, for very large decay rates the occurrence of a Zeno-phenomenon allows for restoring a very high efficiency.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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