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VERSION:2.0
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BEGIN:VEVENT
SUMMARY:Hidden Symmetries of Gravity
DTSTART:20220324T143000Z
DTEND:20220324T160000Z
DTSTAMP:20260801T214257Z
UID:f5b5129e-6fcd-4122-8523-d01f437578df
SEQUENCE:1
CREATED:20220321T103658Z
DESCRIPTION:Abstract:I will discuss classes of hidden symmetries of gravit
 y and their consequences for black holes and compact objects. It is well k
 nown that asymptotically flat black holes in general relativity have a van
 ishing static tidal response (i.e.\, zero Love numbers). In the talk\, I w
 ill first show that this is the result of a hidden structure of ladder sym
 metries governing static (spin 0\,1\,2) perturbations around black holes\,
  and I will discuss the underlying geometric origin. I will also present e
 xamples of hidden symmetries and dualities at finite frequency and their c
 onsequences for quasinormal modes. I will finally briefly present an effec
 tive field theory for perturbations around black holes in scalar-tensor th
 eories and discuss how to connect the effective couplings to possible devi
 ations in the observed ringdown frequencies. 
LAST-MODIFIED:20220321T103658Z
LOCATION:Sala de Seminários do DF\,  Pavilhão de Física\, 2º piso
URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/hidden-symmetries-of-gravi
 ty/
X-ALT-DESC;FMTTYPE=text/html:<p data-block-key="8rdmf"><b>Abstract:</b><br
 />I will discuss classes of hidden symmetries of gravity and their consequ
 ences for black holes and compact objects. It is well known that asymptoti
 cally flat black holes in general relativity have a vanishing static tidal
  response (i.e.\, zero Love numbers). In the talk\, I will first show that
  this is the result of a hidden structure of ladder symmetries governing s
 tatic (spin 0\,1\,2) perturbations around black holes\, and I will discuss
  the underlying geometric origin. I will also present examples of hidden s
 ymmetries and dualities at finite frequency and their consequences for qua
 sinormal modes. I will finally briefly present an effective field theory f
 or perturbations around black holes in scalar-tensor theories and discuss 
 how to connect the effective couplings to possible deviations in the obser
 ved ringdown frequencies. </p>
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