Strong Two‐Phonon Correlations and Bound States in the Continuum in Phononic Waveguides with Embedded SiV Centers
Strong Two‐Phonon Correlations and Bound States in the Continuum in Phononic Waveguides with Embedded SiV Centers
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DOI：
10.1002/qute.202100074
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发表时间：
2021-10
影响因子：
4.4
通讯作者：
Cai‐Peng Shen;Xing-Liang Dong;Jia-Qiang Chen;Yide Qiao;Peng-Bo Li
中科院分区：
文献类型：
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作者：
Cai‐Peng Shen;Xing-Liang Dong;Jia-Qiang Chen;Yide Qiao;Peng-Bo Li
量子声子系统引起了量子科学技术领域的高度关注。然而，在声子系统中的少数声子能级上实现强声子-声子相互作用是相当困难的，因为声子之间的直接相互作用通常非常弱。在这里，研究了具有嵌入式硅空位（SiV）中心的一维声子波导中的声子输运特性和声子-声子相互作用。作者表明，在 SiV 中心的介导下，由于发射声子波与入射波的相干干扰，可以实现强声子-声子相互作用。特别是，嵌入的色心可以在空间中引起声子的有效吸引或排斥相互作用，对应于声子聚束或反聚束。此外，我们发现单个SiV中心可以同时捕获两个共振声子，在连续体中形成声子束缚态。与光子系统中的光子-光子相互作用相比，声子速度相对较慢时，声子-声子相互作用更强，强相关的声子特性有望在量子信息处理中构建各种全声子量子器件。
Quantum phononic systems have attracted great attention in quantum science and technology. However, it is quite difficult to realize strong phonon–phonon interactions at the few phonon level in phononic systems, since direct interactions between phonons are generally very weak. Here, the phonon transport properties and the phonon–phonon interactions in a 1D phononic waveguide with embedded silicon‐vacancy (SiV) centers are studied. The authors show that, mediated by the SiV centers, strong phonon–phonon interactions can be realized due to coherent interferences of the emitting phonon waves with the incident waves. In particular, the embedded color centers can induce an effective attractive or repulsive interaction in space for phonons, corresponding to phonon bunching or antibunching. Besides, it is found that a single SiV center can capture two resonant phonons simultaneously, forming a phononic bound state in the continuum. Comparing with photon–photon interactions in photonic systems, the phonon–phonon interactions are stronger for relatively slower phonon velocity and the strongly correlated phonon properties are promising for constructing various all‐phonon quantum devices in quantum information processing.