Fast preparation of W states with superconducting quantum interference devices by using dressed states
Fast preparation of W states with superconducting quantum interference devices by using dressed states
复制标题
利用修饰态通过超导量子干涉装置快速制备W态
DOI：
10.1103/physreva.94.052311
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发表时间：
2016-10
影响因子：
2.9
通讯作者：
Yan Xia
中科院分区：
文献类型：
--
作者：
Yi-Hao Kang;Ye-Hong Chen;Zhi-Cheng Shi;Jie Song;Yan Xia
本文提出了一种利用超导量子干涉器件（SQUID）制备W态的方案。通过选择合适的修饰态，该方案可以在不需要额外耦合的情况下加速绝热过程。此外，我们可以通过选择合适的控制参数，优化系统的演化与约束的中间态的人口。数值仿真表明，该协议对参数变化和退相干机制具有鲁棒性。此外，该协议是更快和更强大的对失相，与绝热通道相比。用该方法设计的脉冲拉比频率可用高斯函数的线性叠加表示，不增加实验难度。此外，该协议可以很容易地控制和操纵的实验与电路量子电动力学系统。
In this paper, we propose a protocol to prepare W states with superconducting quantum interference devices (SQUID) by using dressed states. Through choosing a set of dressed states suitably, the protocol can be used to accelerate the adiabatic passages while additional couplings are unnecessary. Moreover, we can optimize the evolution of the system with the restraint to the populations of the intermediate states by choosing suitable controlled parameters. Numerical simulations show that the protocol is robust against the parameter variations and decoherence mechanisms. Furthermore, the protocol is faster and more robust against the dephasing, compared with that by the adiabatic passages. As for the Rabi frequencies of pulses designed by the method, they can be expressed by the linear superpositions of Gaussian functions, which does not increase difficulties to the experiments. In addition, the protocol could be controlled and manipulated easily in experiments with a circuit quantum electrodynamics system.