Microscopic Description of Spontaneous Emission in Stark Chirped Rapid Adiabatic Passages

Microscopic Description of Spontaneous Emission in Stark Chirped Rapid Adiabatic Passages
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斯塔克啁啾快速绝热通道中自发发射的微观描述

DOI:
10.1007/s10773-017-3535-z
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发表时间:
2018
影响因子:
1.4
通讯作者:
Zhao Hong Quan
Zhao Hong Quan
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Shi Xuan;Yuan Hao;Zhao Hong Quan

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提出了一种描述斯塔克啁啾快速绝热通道(SCRAP)中自发辐射效应的微观量子计算方法。除了唯象模型外,这个微观模型还可以研究粒子数动力学对环境温度和衰变率γ的依赖关系。以磁通偏置约瑟夫森量子比特为例,研究了SCRAP实现基本Pauli-X门和iSWAP门的效率。我们的结果清楚地表明,微观模型所描述的布居转移行为与零温时的唯象行为相似。在高温极限下,量子比特态的布居概率表现出很强的稳定性。在低温下,由于γ_(?)~ 1的弱衰变率,SCRAP中的量子门操作效率较高。
A microscopic approach describing the effect of spontaneous emission in the stark-chirped rapid adiabatic passages (SCRAPs) for quantum computation is presented. Apart from the phenomenological model, this microscopic one can investigate the dependence of the population dynamics both on the temperature of the environment and the decay rateγ. With flux-biased Josephson qubits as a specifical example, we study the efficiency of the SCRAP for realizing the basic Pauli-X and iSWAP gates. Our results show clearly that the behavior of the population transfer described by the microscopic model is similar with the phenomenological one at zero temperature. In the limit of very high temperature, the population probabilities of the qubit states exhibit strong stability properties. High efficiency for the quantum gate manipulations in SCRAPs is available against the weak decay rateγ≪ 1 at low temperature.
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