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arXiv 1906.07201quant-phcond-mat.stat-mech
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量子控制协议的能量代价

Energetic cost of quantum control protocols

Obinna Abah, Ricardo Puebla, Anthony Kiely, Gabriele De Chiara, Mauro Paternostro, Steve Campbell

摘要:

我们定量评估几个著名的控制协议,实现有限时间绝热动力学,即counterdiabatic和本地counterdiabatic驱动,最优控制和逆向工程的能量成本。通过采用基于总驾驶哈密尔顿规范的成本度量,我们表明,出现了一个层次结构的成本是依赖于协议的持续时间。作为案例研究,我们探讨了朗道-齐纳模型,量子谐振子,和Jaynes-Cummings模型,并建立定性相似的结果在所有情况下举行。对于易于分析的Landau-Zener情况,我们进一步将控制协议的有效性与新的驱动Hamilton的谱特征联系起来,并表明在反绝热驱动的情况下,可以通过优化斜坡来进一步最小化成本。

英文摘要:

We quantitatively assess the energetic cost of several well-known control protocols that achieve a finite time adiabatic dynamics, namely counterdiabatic and local counterdiabatic driving, optimal control, and inverse engineering. By employing a cost measure based on the norm of the total driving Hamiltonian, we show that a hierarchy of costs emerges that is dependent on the protocol duration. As case studies we explore the Landau-Zener model, the quantum harmonic oscillator, and the Jaynes-Cummings model and establish that qualitatively similar results hold in all cases. For the analytically tractable Landau-Zener case, we further relate the effectiveness of a control protocol with the spectral features of the new driving Hamiltonians and show that in the case of counterdiabatic driving, it is possible to further minimize the cost by optimizing the ramp.

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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