FIG. 3: The first four eigenvectors for a dimer given by equation r ( θ ) ; a = 0 . 2 and h = 0 . 5 (dotted line) and h = 0 . 01 (solid line). Smoother yet tight junctions would bring (1 / 2 − χ$_{2}$ ) closer to 0 than sharp and tight junc- tions. The reason is simple: smoother junctions have the two parts of the dimer farther apart. C. Clusters of more than two particles 17 GLYPH<s45>GLYPH<s49> GLYPH<s48> GLYPH<s49> GLYPH<s117> GLYPH<s52> GLYPH<s40> GLYPH<s41> GLYPH<s117> GLYPH<s51> GLYPH<s40> GLYPH<s41> GLYPH<s117> GLYPH<s50> GLYPH<s40> GLYPH<s41> GLYPH<s117> GLYPH<s49> GLYPH<s40> GLYPH<s41> GLYPH<s32> GLYPH<s51>GLYPH<s114>GLYPH<s100> GLYPH<s50>GLYPH<s110>GLYPH<s100> GLYPH<s99>GLYPH<s111>GLYPH<s115>GLYPH<s40> GLYPH<s41> GLYPH<s49>GLYPH<s115>GLYPH<s116> GLYPH<s52>GLYPH<s116>GLYPH<s104>