BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//wp-events-plugin.com//7.2.3.1//EN
TZID:Europe/Berlin
X-WR-TIMEZONE:Europe/Berlin
BEGIN:VEVENT
UID:1546@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20210224T140000
DTEND;TZID=Europe/Berlin:20210224T150000
DTSTAMP:20210218T160714Z
URL:https://qft.physik.hu-berlin.de/next-seminars/timo-weigand-desy/
SUMMARY:Timo Weigand DESY - 
DESCRIPTION:Prof. Dr. Timo Weigand (DESY)\n\nTitle: Emergent Strings and th
 e Weak Gravity Conjecture in 4d N=1 theories\n\nAbstract:\n\nWe describe r
 ecent progress towards proving various general conjectures about the natur
 e of quantum gravity within string theory. The focus will be on compactif
 ications to four dimensions with N=1 supersymmetry\, including the effect 
 of\nquantum corrections. In the first part of the seminar we will study th
 e Swampland Distance Conjecture\, which posits that an infinite tower of s
 tates should become asymptotically light as one approaches  the boundarie
 s of moduli space at infinite distance in a gravitational theory. Accordin
 g to the Emergent String Conjecture\, this tower must either correspond to
  a Kaluza-Klein tower or to the excitations of a weakly coupled fundamenta
 l string emerging at infinite distance. We will verify this general claim
  in the context of non-perturbative compactifications of F-theory to four 
 dimensions. An important part is played by quantum corrections: They consp
 ire such that the tension of the asymptotically light emergent string can
 not drop below the Kaluza-Klein scale\, as required by general consistency
  conditions. We then discuss the effect of quantum corrections on the Wea
 k Gravity Conjecture in theories with four supercharges:  We argue that b
 oth the superextremality condition and the mass of the string excitations 
 which become light at weak coupling are modified by quantum corrections i
 n such a way that the Weak Gravity Conjecture continues to be satisfied.
END:VEVENT
BEGIN:VTIMEZONE
TZID:Europe/Berlin
X-LIC-LOCATION:Europe/Berlin
BEGIN:STANDARD
DTSTART:20201025T020000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
END:STANDARD
END:VTIMEZONE
END:VCALENDAR