BEGIN:VCALENDAR VERSION:2.0 PRODID:-//wp-events-plugin.com//6.4.7.2//EN TZID:Europe/Paris X-WR-TIMEZONE:Europe/Paris BEGIN:VEVENT UID:0-1048@lptms.universite-paris-saclay.fr DTSTART;TZID=Europe/Paris:20251104T110000 DTEND;TZID=Europe/Paris:20251104T120000 DTSTAMP:20251028T103252Z URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm s-dimitri-m-gangardt-university-of-birmingham-uk/ SUMMARY:Séminaire du LPTMS : Dimitri M. Gangardt (University of Birmingham \, UK) - Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°5 30 - 4 Nov 25 11:00 DESCRIPTION:Limit shapes and their phase transitions: classical and quantum \nDimitri M. Gangardt (University of Birmingham\, UK)\n \;\n\n \;\ n\n\nI will present examples of Limit Shapes - the most probable macroscop ic shape\nwith sharp boundaries separating frozen and fluctuating regions - which arise\nin a variety of classical and quantum systems. I will expla in a special role\nplayed by analytic functions defining Riemann surface w hose topology can be\nchanged abruptly across phase transitions. Most of t he examples are based on\nfree fermionic models\, however recently we stud ied a notable exception from\nthis rule - the Polytropic Gas with a power- law equation of state. The hydrodynamic\napproach to Emptiness Formation P robability in Polytropic Gas will be discussed.\n\n\n[1] J. Pallister\, D. M. Gangardt and  A. Abanov\, "Limit shape phase transitions: a merger of arctic circles"\,\n J. Phys. A 55\,  304001\, 2022\n\n[2] James S. Palli ster\, Samuel H. Pickering\, Dimitri M. Gangardt and  Alexander G. Abanov \, "Phase transitions in full counting statistics of free fermions and dir ected polymers"\, Phys. Rev. Research 7\, L022008\, 2025\n\n[3] Alexander G. Abanov\, Dimitri M. Gangardt\, "Emptiness instanton in quantum polytrop ic gas"\, SciPost Phys. 18\, 122\,  2025\n CATEGORIES:seminars LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53 0\, rue André Riviere\, Orsay\, 91405\, France X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\ , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°530:geo:0,0 END:VEVENT BEGIN:VTIMEZONE TZID:Europe/Paris X-LIC-LOCATION:Europe/Paris BEGIN:STANDARD DTSTART:20251026T020000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET END:STANDARD END:VTIMEZONE END:VCALENDAR