BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Ilan Roth (Berkeley) DTSTART:20200609T160000Z DTEND:20200609T170000Z DTSTAMP:20260423T010926Z UID:QMFNoT/4 DESCRIPTION:Title: F rom Braids to Knots\; Topological features in Solar Magnetic Fields – an d beyond…\nby Ilan Roth (Berkeley) as part of QM Foundations & Natur e of Time seminar\n\n\nAbstract\nThe generally accepted structure of magne tic fields depicts them as field lines in $R^3$ with curvature\, rotation and wiggles\, satisfying $\\nabla\\cdot B=0$. Their observed configuration allows us to implement the powerful topological methods\, opening a new v enue for an interpretation of various solar\, interplanetary and astrophys ical phenomena. Direct imaging of the coronal fields pinpoints to their br aiding structure\, large solar wind field reversal (switchback) and interm ittent fading of energetic flare ions suggest that coronal braided field m ay have been carried by the solar wind. The interconnection between the ma thematical braids and knots is applied to the topologically non-trivial ma gnetized structures and their dynamics\, from solar corona and the interpl anetary medium to the astrophysical Herbig – Haro jets. The topological invariants attached to a given knot/braid become the crucial factor in the evolution and interpretation of the phenomena in space. The methods invol ved cover classical as well as analogues of quantum procedures. The analys is results in conjectures regarding (i) stability of coronal magnetic loop s under large oscillations\, (ii) their evolution through successive emerg ence/decay of heated magnetic braids\, (iii) their morphism into the solar wind knotty structures and (iv) large scale narrow jets emitted in star-f orming regions. These conjectures may contribute significantly to the unde rstanding of physical processes in the lab and in solar/astrophysical medi um\, particularly in the dynamo produced magnetic structures as observed b y Parker Solar Probe.\n LOCATION:https://researchseminars.org/talk/QMFNoT/4/ END:VEVENT END:VCALENDAR