Quantum simulators based on the global collective light-matter interaction
Quantum simulators based on the global collective light-matter interaction
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DOI：
10.1103/physreva.93.063632
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发表时间：
2016-02
影响因子：
2.9
通讯作者：
S. Caballero-Benitez;G. Mazzucchi;I. Mekhov
中科院分区：
文献类型：
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作者：
S. Caballero-Benitez;G. Mazzucchi;I. Mekhov
我们表明，耦合超冷原子在光学晶格中的光腔的量子化模式导致的量子相位的物质，这在同一时间的短，长距离相互作用的系统的属性。这为有限范围相互作用系统的新型量子模拟器开辟了前景，即使光诱导相互作用是全局的（即无限长范围）。这是通过在微观尺度上的全球光-物质耦合的空间结构来实现的。此类模拟器可以直接受益于全局光物质相互作用的集体增强，并构成使用里德伯原子或极性分子的标准方法的替代方案。在光的稳定状态下的系统诱导有效的多体相互作用，改变了典型的玻色-哈伯德模型的相图的景观。因此，该系统可以支持非平凡的超流态，玻色子二聚体，三聚体等状态和超固相，这取决于相对于经典光学晶格势的光的波长和图案的选择。我们发现，通过仔细选择系统参数，人们可以研究不同的强关联物理与相同的设置，即，修改光束的几何形状。特别是，我们提出了密度和键（或物质波相干）相互作用之间的相互作用。我们展示了如何调整有效的相互作用长度在这样一个混合系统的短程和全球的相互作用。
We show that coupling ultracold atoms in optical lattices to quantized modes of an optical cavity leads to quantum phases of matter, which at the same time posses properties of systems with both short- and long-range interactions. This opens perspectives for novel quantum simulators of finite-range interacting systems, even though the light-induced interaction is global (i.e. infinitely long range). This is achieved by spatial structuring of the global light-matter coupling at a microscopic scale. Such simulators can directly benefit from the collective enhancement of the global lightmatter interaction and constitute an alternative to standard approaches using Rydberg atoms or polar molecules. The system in the steady state of light induces effective many-body interactions that change the landscape of the phase diagram of the typical Bose-Hubbard model. Therefore, the system can support non-trivial superfluid states, bosonic dimer, trimers, etc. states and supersolid phases depending on the choice of the wavelength and pattern of the light with respect to the classical optical lattice potential. We find that by carefully choosing the system parameters one can investigate diverse strongly correlated physics with the same setup, i.e., modifying the geometry of light beams. In particular, we present the interplay between the density and bond (or matter-wave coherence) interactions. We show how to tune the effective interaction length in such a hybrid system with both short-range and global interactions.