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In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
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Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
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Robustness of a coherence vortex.

Cleberson R Alves, Alcenisio J Jesus-Silva, Eduardo J S Fonseca

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    Coherence vortices survive transmission through obstacles, retaining their topological charge. Changes to the coherence function

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    Area of Science:

    • Optics and Photonics
    • Quantum Information Science

    Background:

    • Coherence vortices are fundamental in wave phenomena.
    • Understanding their behavior through perturbations is crucial for applications.

    Purpose of the Study:

    • To investigate the resilience of coherence vortices after interacting with obstacles.
    • To analyze the preservation of topological charge and coherence properties.

    Main Methods:

    • Experimental transmission of coherence vortices through defined obstacles.
    • Theoretical modeling of vortex behavior and coherence function dynamics.

    Main Results:

    • Coherence vortices demonstrate robustness, surviving obstacle transmission.
    • The effective topological charge of the vortex remains invariant.
    • Modulus changes in the coherence function are transient and recover during propagation.

    Conclusions:

    • Coherence vortices possess inherent stability against obstructive elements.
    • Topological charge is a conserved quantity for these vortices under tested conditions.
    • Wave propagation dynamics facilitate the recovery of coherence properties post-interaction.