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arXiv · 0704.2770

A remark on helical waveguides

Pavel Exner·Martin Fraas
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Abstract

Motivated by a proposal to create an optical helix-shaped waveguides for cold atoms and molecules, we discuss local perturbations which can create bound states in such a setting. This is known about a local slowdown of the twist; we show that a similar effect can result from a local tube protrusion or a change of the helix radius in correlation with its pitch angle.

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Pavel Exner, Martin Fraas. 2007-04-20. A remark on helical waveguides. https://doi.org/10.1016/j.physleta.2007.05.013

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