Erratum: Structure and stability of Mott-insulator shells of bosons trapped in an optical lattice [Phys. Rev. A 71, 063601 (2005)]

Figure 6

(Color online) The spectrum for transitions between $\mid a⟩$ and $\mid b⟩$ for $n=1,2,3$. The transition frequency between states with different $n_a$ and $n_b$ is shown by the thick line. The dashed lines indicate the boundaries between sites with different $n$ in the lattice, which occur at radii $R_0$, $R_1$, and $R_2$. Sites with $n=1,2,3$ are indicated with green, blue, and red coloring, respectively (color available online). The interaction energy shifts are indicated, and the figure is drawn assuming $\beta >1$.