stripe when $\alpha$ is increased. This leads to a more pronounced quasi-degeneracy of the ground-state multiplet, and an increase of the gap between this multiplet and the excited states. For yet larger values of $\alpha$, it appears that some of these excited states may become the ground state, however this occurs for very large $\alpha$ when this finite system effectively becomes one-dimensional under anisotropy deformations.

In case of $\nu=2+1/3$ state, it has been argued that the isotropy point is described by a two-dimensional CDW order known as the bubble phase [@edduncanky_bubble]. A bubble differs from a stripe in having a larger degeneracy and a two-dimensional mesh of (quasi)degenerate ground-state wavevectors (as opposed to the one-dimensional array in case of a stripe). The spread of the quasidegenerate levels was also found to be somewhat larger than in case of stripes. All of these features are obvious in Fig.\[fig\_ll2\] (left) for $\alpha=1$. The bubble phase remains stable to some extent when $\alpha$ is reduced; for very small $\alpha$ it is eventually destroyed and replaced by a simple CDW. On the other hand, when $\alpha$ is increased, a smaller subset of momenta becomes very closely degenerate with some of the excited levels. This 