1302.6405 (Ho-Kei Chan)
Ho-Kei Chan
A hybrid helical structure of equal-sized hard spheres in cylindrical confinement was discovered as a 'by-product' of the recently developed sequential deposition approach [Physical Review E 84, 050302(R) (2011)] for constructing the densest possible packings of such systems. Unlike ordinary helical structures that are characterized by a single type of strand (e.g. double-strand for double helix), this novel structure exists as a hybrid of the single- and double-helix with an alternating sequence of single- and double-strands. This article explains how this previously unknown structure can be constructed via the abovementioned sequential deposition approach, which involves manipulating the positions of a few spheres to create a template for the deposition process. The findings show that it is possible to discover new structures through varying the configuration of spheres within the template, where this approach relies on a sensitive dependence of the deposition-generated structures on the template.
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http://arxiv.org/abs/1302.6405
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