论文标题
沮丧的蜂窝玻色 - 哈伯德模型中的螺旋超流体
Helical superfluid in a frustrated honeycomb Bose-Hubbard model
论文作者
论文摘要
我们研究了一种“螺旋”超氟，这是一种沮丧的骨值模型中的非零摩托浓缩液。在平均田间bogoliubov级别上，这种新型状态表现出“近晶”波动，其质量强于常规超流体。我们开发一个相图并计算其各种物理特性，包括光谱，结构因子，凝结物消耗，动量分布，所有这些分布都与常规超流体质量不同。波动，相互作用和晶格效应的相互作用会导致逐订单的现象，从而导致从近晶型超流体制度到各向异性XY XY超级流体阶段的交叉。我们对微观晶格分析进行了对这种螺旋超流体的现场理论描述的补充，我们源自显微镜，并在一般的对称地面上证明是合理的，并确保找到完全的一致性。讨论了可能的实验实现。
We study a "helical" superfluid, a nonzero-momentum condensate in a frustrated bosonic model. At mean-field Bogoliubov level, such a novel state exhibits "smectic" fluctuation that are qualitatively stronger than that of a conventional superfluid. We develop a phase diagram and compute a variety of its physical properties, including the spectrum, structure factor, condensate depletion, momentum distribution, all of which are qualitatively distinct from that of a conventional superfluid. Interplay of fluctuations, interaction and lattice effects gives rise to the phenomenon of order-by-disorder, leading to a crossover from the smectic superfluid regime to the anisotropic XY superfluid phase. We complement the microscopic lattice analysis with a field theoretic description for such a helical superfluid, which we derive from microscopics and justify on general symmetry grounds, reassuringly finding full consistency. Possible experimental realizations are discussed.
