BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:iCalendar-Ruby BEGIN:VEVENT CATEGORIES:Lectures & Presentations DESCRIPTION:The Physics & Astronomy Colloquium Series presents Junichiro Ko no of Rice University\, Houston\, Texas\, discussing "Cavity-Dressed Quantu m Matter" on Feburary 14.\n\n \n\nAbstract: There has been a growing realiz ation that the properties of a material can be modified just by placing it in an optical cavity. The quantum vacuum fields surrounding the material in side the cavity can cause nonintuitive modifications of electronic states t hrough ultrastrong vacuum–matter coupling\, producing a vacuum-dressed mate rial with novel properties. Existing theoretical predictions include cavity -enhanced\, cavity-induced\, and cavity-mediated enhancement of electron–ph onon coupling and superconductivity\, electron pairing\, anomalous Hall eff ect\, ferroelectric phase transitions\, quantum spin liquids\, and photon c ondensation. \n\n \n\nAchieving the so-called ultrastrong coupling (USC) re gime is a prerequisite for observing these effects\, which arise when the i nteraction energy becomes a significant fraction of the bare photonic mode and matter excitation frequencies. Most intriguingly\, when a material is u ltrastrongly coupled with cavity-enhanced vacuum electromagnetic fields\, i ts ground state will contain virtual photons. This nonperturbative virtual driving without external fields can lead to phase transitions in thermal eq uilibrium. \n\n \n\nThis talk will describe our recent studies of USC pheno mena in various solid-state cavity quantum electrodynamics systems in searc h of such vacuum-induced phases of matter. We utilize the phenomenon of Dic ke cooperativity\, i.e.\, many-body enhancement of light–matter interaction \, to explore quantum-optical strategies for creating\, controlling\, and u tilizing novel phases in condensed matter enabled by the quantum vacuum. DTEND:20250214T220000Z DTSTAMP:20250223T234910Z DTSTART:20250214T211000Z GEO:39.322732;-82.10287 LOCATION:Walter Hall\, 145 SEQUENCE:0 SUMMARY:Physics Colloquium | Cavity-Dressed Quantum Matter\, Feb 14 UID:tag:localist.com\,2008:EventInstance_48852111243541 URL:https://calendar.ohio.edu/event/physics-colloquium-cavity-dressed-quant um-matter-feb-14 END:VEVENT END:VCALENDAR