BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
CALSCALE:GREGORIAN
PRODID:-//WordPress - MECv6.4.2//EN
X-ORIGINAL-URL:https://www.lps.u-psud.fr/
X-WR-CALNAME:Laboratoire de physique des Solides
X-WR-CALDESC:
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-PUBLISHED-TTL:PT1H
X-MS-OLK-FORCEINSPECTOROPEN:TRUE
BEGIN:VEVENT
CLASS:PUBLIC
DTSTART;TZID=Europe/Paris:20261105T110000
DTEND;TZID=Europe/Paris:20261105T180000
DTSTAMP:20261030T102900
UID:MEC-81b44841fd564c347f7f21ae19b97659@lps.u-psud.fr
CREATED:20261030
LAST-MODIFIED:20261030
PRIORITY:5
TRANSP:OPAQUE
SUMMARY:Wladimir A Benalcazar : Spatial Localizers: Where Electrons and Excitons Live in Quantum Matter
DESCRIPTION:\nSpeaker: Wladimir A Benalcazar, Assistant Professor of Physics, Emory University\n\n\n\nElectron localization underlies chemical bonding, polarization, and band topology, yet beyond one dimension no general framework exists to determine where electrons sit in an insulator. I will introduce the spatial localizer, an operator whose spectrum locates electrons in two- and three-dimensional insulators, including those with boundaries, defects, and disorder. It yields a position-space bulk-defect correspondence for charge and maximally localized states that reduce to Wannier functions in atomic insulators and to Landau-level-like coherent states in Chern insulators. I will then extend this idea to excitons, where simultaneous localization of electron and hole is obstructed by the quantum geometric dipole. An exciton spatial localizer overcomes this, producing constituent-resolved exciton Wannier functions without gauge fixing or optimization.\n
URL:https://www.lps.u-psud.fr/events/wladimir-a-benalcazar-spatial-localizers-where-electrons-and-excitons-live-in-quantum-matter/
CATEGORIES:Séminaire de la Théorie de la Matière Condensée,Séminaires
ATTACH;FMTTYPE=image/jpeg:https://www.lps.u-psud.fr/wp-content/uploads/2026/10/Wladimir-A-Benalcazar.jpg
END:VEVENT
END:VCALENDAR