AI 中文总结
本研究通过量子蒙特卡洛方法，在工程化非轴对称偶极相互作用的软核Bose-Hubbard模型中发现粒子掺杂侧会形成条纹超固体，揭示了偶极核与在位软度分别调控条纹通道与相干缺陷的机制。
AI 中文摘要
超固体兼具密度有序性与相位相干性，而掺杂晶格固体提出了一个问题：新增的缺陷能否在不熔化有序背景的情况下变得相干。我们研究了一种具有各向同性跃迁和工程化非轴对称偶极相互作用的软核Bose-Hubbard模型，相互作用形式为\
英文摘要
A supersolid combines density order with phase coherence, and doped lattice solids ask whether added defects can become coherent without melting the ordered background. We study a soft-core Bose-Hubbard model with isotropic hopping and an engineered non-axisymmetric dipolar interaction, \(V_{ij}=V_2(x_{ij}^2-y_{ij}^2)/r_{ij}^5+W_6/r_{ij}^6\), where the sign-changing \(d_{x^2-y^2}\) component selects a fixed \((q,0)\) stripe channel and the \(W_6/r^6\) core stabilizes the short-distance attractive branch. Using sign-problem-free quantum Monte Carlo method with worm algorithm, we find that the half-filled stripe parent responds asymmetrically to doping: the hole side forms locked commensurate stripe solids with vanishing superfluid stiffness, whereas the particle side forms a stripe supersolid with finite compressibility \(κ>0\), finite superfluid stiffness \(ρ_s>0\), and enhanced double occupancy \(D\). Keeping the same off-site kernel while increasing \(U/t\) toward the hard-core limit shows that the particle-side supersolid disappears once doublon-like defects are projected out. Thus the engineered dipolar kernel selects the fixed \((q,0)\) stripe channel, while onsite softness selects the phase-coherent defect sector.
Commentsmain 7 pages+supplemental
