Water cataracts and the “shortest-time descent” curve (Brachistochrone) as one natural phenomenon
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DOI: 10.1063/5.0253849
Abstract: This article unveils the connection between design in nature and a classic mathematics problem from 1696 to 1697: the brachistochrone. Some flow designs seem to act as obstacles to flow (cataracts, waterfalls, and roll waves),… read more here.
Keywords: brachistochrone; one natural; shortest time; time descent ... See more keywords
Integrability and chaos in the quantum brachistochrone problem
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DOI: 10.1103/physreva.110.022205
Abstract: The quantum brachistochrone problem addresses the fundamental challenge of achieving the quantum speed limit in applications aiming to realize a given unitary operation in a quantum system. Specifically, it looks into optimization of the transformation… read more here.
Keywords: brachistochrone; chaos quantum; quantum brachistochrone; integrability chaos ... See more keywords
Rapid water drainage on human eyelashes of a hydrophobic Brachistochrone fiber array
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DOI: 10.1126/sciadv.adr2135
Abstract: Numerous organisms exploit asymmetrical capillary forces generated by unique fiber or asymmetrical tapered structures to rapidly eliminate undesired liquid for survival in moist or rainy habitats. Human eyelashes, the primary protector of eyes, use a… read more here.
Keywords: fiber array; human eyelashes; drainage; brachistochrone ... See more keywords