论文标题

使用逼真的Rydberg调料访问冷原子量子模拟器中的拓扑Mott绝缘子

Accessing the topological Mott insulator in cold atom quantum simulators with realistic Rydberg dressing

论文作者

Cardarelli, Lorenzo, Julià-Farré, Sergi, Lewenstein, Maciej, Dauphin, Alexandre, Müller, Markus

论文摘要

多体相互作用与动能之间的相互作用产生了丰富的相图托管,以及相互作用引起的拓扑阶段。这些阶段的特征是局部秩序参数和全球拓扑不变的,并且可以表现出异国情调的基础状态,例如自被困的极性子和相互作用诱导的边缘状态。在这项工作中,我们研究了使用冷rydberg的原子在光学晶格中对此类系统进行量子模拟的现实情况。我们考虑在棋盘格晶格上使用无旋转的费米子,通过Rydberg敷料引起的可调范围有效势相互作用。我们在平均场近似中对一半和不相当填充的相图进行了详细的分析。我们进一步研究了使用密度矩阵重新归一化组方法在平均场近似内以及量子波动方面的稳定性。最后,我们提出了一个实施协议,特别是确定了可访问模型的拓扑特性的实验参数的可达到的制度。因此,我们的工作为在最先进的冷原子量子模拟器中对这一预测阶段的出色实验观察开辟了现实途径。

The interplay between many-body interactions and the kinetic energy gives rise to rich phase diagrams hosting, among others, interaction-induced topological phases. These phases are characterized by both a local order parameter and a global topological invariant, and can exhibit exotic ground states such as self-trapped polarons and interaction-induced edge states. In this work, we investigate a realistic scenario for the quantum simulation of such systems using cold Rydberg-dressed atoms in optical lattices. We consider spinless fermions on a checkerboard lattice, interacting via the tunable-range effective potential induced by the Rydberg dressing. We perform a detailed analysis of the phase diagram at half- and incommensurate fillings, in the mean-field approximation. We furthermore study the stability of the phases with respect to temperature within the mean-field approximation and with respect to quantum fluctuations using the density matrix renormalization group method. Finally, we propose an implementation protocol, and in particular identify attainable regimes of experimental parameters in which the topological properties of the model become accessible. Our work, thereby, opens a realistic pathway to the outstanding experimental observation of this predicted phase in state-of-the-art cold atom quantum simulators.

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