Rydberg-interaction gates via adiabatic passage and phase control of driving fields
Rydberg-interaction gates via adiabatic passage and phase control of driving fields
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通过绝热通道和驱动场相位控制的里德伯相互作用门
DOI：
10.1103/physreva.96.022321
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发表时间：
2017-08
影响因子：
2.9
通讯作者：
Zheng Shi Biao
中科院分区：
文献类型：
--
作者：
Wu Huaizhi;Huang Xi Rong;Hu Chang Sheng;Yang Zhen Biao;Zheng Shi Biao
在本文中，我们提出了两个理论方案，通过工程的相位敏感暗态的两个原子受到里德伯-里德伯相互作用的实现量子相位门。结合传统的绝热技术和目前发展的相位控制方法，提出了一种可行的几何相位门的实现方案，其中条件相移（Berry相位）是通过周期性地和周期性地改变驱动场的参数来实现的。在这里，我们发现，几何相位获取的方式有关的相对相位调制。在第二种方案中，系统哈密顿量以非循环的方式被动态地改变，使得所获得的条件相位不是Berry相位。对实验的可行性和退相干效应进行了详细的分析。该方案为绝热操纵具有定制相位调制的相互作用里德伯系统提供了新的视角。
In this paperwe propose two theoretical schemes for implementation of quantum phase gates by engineering the phase-sensitive dark state of two atoms subjected to Rydberg-Rydberg interaction. Combining the conventional adiabatic techniques and currently developed approaches of phase control, a feasible proposal for implementation of a geometric phase gate is presented, where the conditional phase shift (Berry phase) is achieved by adiabatically and cyclically changing the parameters of the driving fields. Here we find that the geometric phase acquired is related to the way how the relative phase is modulated. In the second scheme, the system Hamiltonian is adiabatically changed in a noncyclic manner, so that the acquired conditional phase is not a Berry phase. A detailed analysis of the experimental feasibility and the effect of decoherence is also given. The proposed schemes provide new perspectives for adiabatic manipulation of interacting Rydberg systems with tailored phase modulation.