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SUMMARY:Francesc Cunillera (U. Nottingham)
DTSTART:20220209T150000Z
DTEND:20220209T160000Z
DTSTAMP:20260423T035538Z
UID:AnLy/5
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/AnLy/5/">Qui
 ntessence and the Swampland: tales of parametric and numerical control</a>
 \nby Francesc Cunillera (U. Nottingham) as part of AnLy Strings and Fields
  online seminars\n\n\nAbstract\nWe provide a detailed discussion of the ma
 in theoretical and phenomenological challenges of quintessence model build
 ing in any parametric or numerically controlled regime of the moduli space
  of string theory. We argue that a working quintessence model requires a l
 eading order non-supersymmetric (near) Minkowski vacuum with an axionic fl
 at direction away from the boundary of moduli space. This axion\, when lif
 ted by subdominant non-perturbative effects\, could drive hilltop quintess
 ence only for very tuned initial conditions and a very low inflationary sc
 ale.\nOur analysis has a twofold implication: (1) Scenarios which are in a
 greement with the swampland dS conjecture\, like AdS and supersymmetric Mi
 nkowski vacua\, as well as runaways\, cannot allow for phenomenologically 
 viable quintessence with full computational control. This raises doubts on
  the validity of the swampland dS conjecture since it would imply a strong
  tension between quantum gravity and observations. (2) If data will prefer
  dynamical dark energy\, axion models based on misalignment mechanisms loo
 k more promising than hilltop scenarios which are very contrived.\n
LOCATION:https://researchseminars.org/talk/AnLy/5/
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