Department of Physics, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
Phys Rev Lett. 2009 Nov 27;103(22):225301. doi: 10.1103/PhysRevLett.103.225301. Epub 2009 Nov 24.
We perform a stability analysis of superfluid (SF) and supersolid (SS) phases of polarized dipolar bosons in two-dimensional optical lattices at high filling factors and zero temperature, and obtain the phase boundaries between SF, checkerboard SS (CSS), striped SS (SSS), and collapse. We show that the phase diagram can be explored through the application of an external field and the tuning of its direction with respect to the optical lattice plane. In particular, we find a transition between the CSS and SSS phases.
我们对高填充因子和零温度下二维光学晶格中极化的双原子玻色子的超流 (SF) 和超固态 (SS) 相进行了稳定性分析，并得到了 SF、棋盘 SS (CSS)、条纹 SS (SSS) 和坍塌之间的相界。我们表明，可以通过施加外场并调整其相对于光学晶格平面的方向来探索相图。特别是，我们发现了 CSS 和 SSS 相之间的转变。
