Floquet engineering to entanglement protection of distant nitrogen vacancy centers
Floquet engineering to entanglement protection of distant nitrogen vacancy centers
复制标题
DOI：
10.1088/1367-2630/aaf8f4
复制
发表时间：
2019-01
影响因子：
3.3
通讯作者：
W. Yang;W. Song;J. An;M. Feng;D. Suter;Jiangfeng Du
中科院分区：
文献类型：
--
作者：
W. Yang;W. Song;J. An;M. Feng;D. Suter;Jiangfeng Du
保持具有高保真度的远距离固态量子比特之间的纠缠仍然具有挑战性，例如氮空位中心（NVCs）。我们提出了一种Floquet工程策略，通过在NVC上局部施加周期性强驱动来保护两个在长空间距离中分离的弱相互作用NVC之间的最大纠缠。结果表明，在一定的驱动参数下，非易失性光学相干体的Floquet态的纠缠在整个驱动周期内共振地达到最大值。我们的分析表明，这是避免的Floquet准能谱中的能级交叉的发生，导致这种纠缠共振。还分析了耗散对产生的纠缠的影响。我们的结果可能是理论和实验的兴趣，在探索长期的纠缠之间的弱相互作用的自旋到长距离在现实环境中。
It remains challenging to preserve entanglement between distant solid-state qubits with high-fidelity, such as nitrogen vacancy centers (NVCs). We propose a Floquet engineering strategy to protect the maximal entanglement between two weakly interacting NVCs separated in long spatial distance by locally applying periodic strong driving on the NVCs. It is found that entanglement of the Floquet states of the NVCs resonantly reaches its maximum during the whole driving period at certain values of the driving parameters. Our analysis reveals that it is the occurrence of the avoided level crossing in the Floquet quasienergy spectrum which results in such entanglement resonance. The dissipation effect on the generated entanglement has also been analyzed. Our results may be of both theoretical and experimental interests in exploring the long-lasting entanglement between weakly interacting spins to long distances in realistic environments.