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arXiv 2103.14285quant-phcond-mat.mes-hall
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驱动场对耦合量子比特多光子跃迁光谱特性的控制

Control of spectroscopic features of multiphoton transitions in two coupled qubits by driving fields

V. O. Munyaev, M. V. Bastrakova

摘要:

研究了两个耦合磁通量子比特的量子能级布居行为随外驱动场特性的变化。在隧道分裂能较小的情况下,得到了任意控制场振幅下多光子跃迁几率的显式表达式。我们描述了可控的功能,它们的形成,从而创建或破坏纠缠的系统偏置调谐上的直接级间跃迁,并在过渡期间通过中间状态。我们发现了量子位数反转的一个特征,其结果是共振位置与量子位耦合强度无关。利用Floquet-Markov方程,我们数值地证明了多光子共振的位置对于耗散过程是稳定的。

英文摘要:

The quantum levels population behavior of the two coupled flux qubits depending on the external driving field characteristics is studied. The explicit expressions for the multiphoton transition probabilities at an arbitrary control field amplitude is obtained for the case of small tunnel splitting energies. We describe the controllable features of their formation and thereby creating or destroying entanglement by system bias tuning on the direct inter-level transition and during the transition through intermediate states. We found a feature of the qubits population inverting that ends in the independence of the resonances positions from the qubits coupling strength. Using Floquet--Markov equation we numerically demonstrate, that the positions of multiphoton resonances are stable to dissipative processes.

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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