Events List

DateEvent TypeSpeaker
02/01/2024Physics Dept ColloquiumAndrea Alù [ + ]
02/02/2024Hep Th Discussion GroupPopov [ + ]
02/02/2024Informal HEP TalkChiara Toldo [ + ]
02/05/2024CCPP Brown BagGlennys Farrar [ + ]
02/06/2024Grad Pheno Journal Club [ + ]
02/07/2024Astro SeminarDaniel Lecoanet [ + ]
02/07/2024ArXiv Discussion [ + ]
02/07/2024GS Pizza LunchDaniel Lecoanet [ + ]
02/07/2024HEP SeminarAntonio Davide Polosa [ + ]
02/07/2024Cosmic Happy HourMarcus DuPont [ + ]
02/08/2024Physics Dept ColloquiumWill Farr [ + ]
02/09/2024Hep Th Discussion GroupPopov [ + ]
02/09/2024HEP Discussion SessionsZare [ + ]
02/13/2024Astro SeminarSam Hadden [ + ]
02/14/2024HEP SeminarMarieke Van Beest [ + ]
02/15/2024Physics Dept ColloquiumAndrei Bernevig [ + ]
02/16/2024Special SeminarLuca Comisso [ + ]
02/16/2024Hep Th Discussion GroupPopov [ + ]
02/16/2024HEP Discussion SessionsZare [ + ]
02/20/2024Astro SeminarNicole Shibley [ + ]
02/20/2024Grad Pheno Journal Club [ + ]
02/21/2024ArXiv Discussion [ + ]
02/21/2024HEP SeminarOfer Aharony [ + ]
02/22/2024Physics Dept ColloquiumBrad Marston [ -- ]

Title: Waves of Topological Origin in the Fluid Earth System and Beyond
Abstract: Symmetries and topology are central to our understanding of physical systems. Topology, for instance, explains the precise quantization of the Hall effect and the protection of surface states in topological insulators against scattering from disorder or bumps. However discrete symmetries and topology have not, until recently, contributed much to our understanding of the fluid dynamics of oceans and atmospheres. In this talk I show that, as a consequence of the rotation of the Earth that breaks time reversal symmetry, equatorial Kelvin and Yanai wavesemerge as topologically protected edge modes. The non-trivial topology of the bulk Poincaréwaves is revealed through their winding number in frequency - wavevector space. Bulk-interface correspondence then guarantees the existence of the two equatorial waves. I discussour recent direct detection of the winding number in observations of Earth’s stratosphere.Thus the oceans and atmosphere of Earth naturally share basic physics with topologicalinsulators. As equatorially trapped Kelvin waves in the Pacific ocean are an importantcomponent of El Niño Southern Oscillation, the largest climate oscillation on time scales of afew years, topology plays a surprising role in Earth’s climate system. We also predict thatwaves of topological origin will arise in magnetized plasmas. The waves may appear inlaboratory plasma experiments, and they may also arise in the solar system and beyond. (4:00 PM - 5:30 PM, 726 Broadway, 940, CCPP Seminar)
02/23/2024Hep Th Discussion GroupPopov [ + ]
02/23/2024HEP Discussion SessionsZare [ + ]
02/26/2024CCPP Brown BagAnirban Roy [ + ]
02/26/2024Informal HEP TalkMatthew Buican [ + ]
02/27/2024Astro SeminarFoteini Oikonomou [ + ]
02/28/2024HEP SeminarMariangela Lisanti [ + ]
02/29/2024Physics Dept ColloquiumJun Kono [ + ]