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SUMMARY:Integrable deformations and Generalised Dualities
DTSTART;VALUE=DATE-TIME:20190605T143000Z
DTEND;VALUE=DATE-TIME:20190605T153000Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3434429@indico.cern.ch
DESCRIPTION:Speakers: Dan Thompson (Swansea University)\nI will outline so
me recent progress in understanding classes of integrable deformations of
strings relevant to e.g. the AdS_5 x S^5 superstring. These so-called eta
and lambda-deformations exhibit a rich structure of Poisson-Lie symmetries
and corresponding notions of Poisson-Lie and non-Abelian T-duality. I wil
l explain how these symmetries become natural when harnessing the power of
generalised geometry. I will outline recent results concerning the open s
tring sector of lambda-deformations and the interplay of integrable D-bran
es with PL and non-Abelian dualisation.\nhttps://indico.cern.ch/event/8011
46/contributions/3434429/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3434429/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Many Facets of Poisson-Lie T-duality
DTSTART;VALUE=DATE-TIME:20190603T100000Z
DTEND;VALUE=DATE-TIME:20190603T110000Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3434450@indico.cern.ch
DESCRIPTION:Speakers: Falk Hassler (University of Oviedo)\nPoisson-Lie T-d
uality was originally introduced to identify \nthe dynamics of closed stri
ngs probing different target spaces. But nowadays it also has become a cru
cial ingredient in the construction of integrable\, two-dimensional sigma-
models. After reviewing this intriguing connection from a worldsheet persp
ective\, I will switch to the target space. There we are going to see that
Poisson-Lie T-duality naturally appears in the context of gauged SUGRAs a
nd consistent truncations which help to construct new AdS vacua.\nhttps://
indico.cern.ch/event/801146/contributions/3434450/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3434450/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Integrable deformations of the AdS5 x S5 superstring: resolving so
me puzzles
DTSTART;VALUE=DATE-TIME:20190604T083000Z
DTEND;VALUE=DATE-TIME:20190604T093000Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3429628@indico.cern.ch
DESCRIPTION:Speakers: Ben Hoare (ETH Zurich)\nRecent explorations of the A
dS5 x S5 superstring and its integrable deformations have greatly improved
our understanding of integrable string sigma models. However\, they have
also led to a number of puzzles. In this talk we will focus on two particu
lar deformations\, the eta and lambda deformations\, and their Poisson-Lie
duals. In these models the symmetry algebra is q-deformed. We will review
the construction of the deformed models and discuss the latest developmen
ts in the resolution of one particular puzzle: when do the deformed backgr
ounds solve the type IIB supergravity equations of motion. To conclude\, w
e will recall some of the puzzles that remain unanswered.\nhttps://indico.
cern.ch/event/801146/contributions/3429628/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3429628/
END:VEVENT
BEGIN:VEVENT
SUMMARY:From 1 to N
DTSTART;VALUE=DATE-TIME:20190605T100000Z
DTEND;VALUE=DATE-TIME:20190605T110000Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3429356@indico.cern.ch
DESCRIPTION:Speakers: Marc Magro (ENS Lyon)\nI shall first review the inte
rpretation of integrable sigma-models as realizations of affine Gaudin mod
els. It will then be explained how to obtain new classical integrable fiel
d theories by assembling two affine Gaudin models into a single one. Final
ly\, the application of this method to couple together an arbitrary number
of principal chiral model fields on the same Lie group\, each with a Wess
-Zumino term will be presented.\nhttps://indico.cern.ch/event/801146/contr
ibutions/3429356/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3429356/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum info from symmetry\, geometry and the effective action
DTSTART;VALUE=DATE-TIME:20190605T083000Z
DTEND;VALUE=DATE-TIME:20190605T093000Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3430827@indico.cern.ch
DESCRIPTION:Speakers: Kostas Sfetsos (University of Athens)\nA well known
gauging procedure allowed for the systematic construction of exact deforma
tions of current algebra theories with large classes of them being integra
ble. We present a modification of this construction allowing for the deter
mination of the anomalous dimension of arbitrary composite operators in th
ese theories exactly in the deformation couplings. In our approach loop co
mputations are completely avoided.\nhttps://indico.cern.ch/event/801146/co
ntributions/3430827/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3430827/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yang-Baxter deformations of the AdS3 string as marginal deformatio
ns of the WZW-model
DTSTART;VALUE=DATE-TIME:20190603T083000Z
DTEND;VALUE=DATE-TIME:20190603T093000Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3430995@indico.cern.ch
DESCRIPTION:Speakers: Linus Wulff (Masaryk University of Brno)\nThe Yang-B
axter deformations of the (bosonic) AdS3xS3 string will be classified and
shown to correspond\, via a field redefinition\, to marginal current-curre
nt deformations of the WZW-model.\nhttps://indico.cern.ch/event/801146/con
tributions/3430995/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3430995/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Double and exceptional field theory
DTSTART;VALUE=DATE-TIME:20190603T130000Z
DTEND;VALUE=DATE-TIME:20190603T140000Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3431004@indico.cern.ch
DESCRIPTION:Speakers: David Berman (Queen Mary University of London)\nhttp
s://indico.cern.ch/event/801146/contributions/3431004/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3431004/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Exploring the landscape of eta-deformed AdS superstrings
DTSTART;VALUE=DATE-TIME:20190604T130000Z
DTEND;VALUE=DATE-TIME:20190604T134500Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3434057@indico.cern.ch
DESCRIPTION:Speakers: Fiona Seibold (ETH Zurich)\nI will focus on integrab
le eta deformations of AdS superstrings with the deformation encoded in an
operator R satisfying the modified classical Yang-Baxter deformation. Suc
h R-matrices include those of Drinfel'd-Jimbo type\, whose action is dicta
ted by the choice of Dynkin diagram and associated Cartan-Weyl basis. Supe
ralgebras admit inequivalent Dynkin diagrams and thus allow for different
deformations. Focussing on the AdS2xS2xT6 case\, I will present all possib
le backgrounds and show that only the R-matrix associated with the fermion
ic Dynkin diagram is unimodular\, giving rise to a supergravity background
. While this resolves one of the main puzzles of eta-deformed superstrings
\, others remain including the behavior in the maximal deformation limit.
Extending to the bi-Yang-Baxter deformation of the AdS3xS3xT4 superstring
I will show how\, in this case\, the maximal deformation limit can be rela
ted to the mirror model.\nhttps://indico.cern.ch/event/801146/contribution
s/3434057/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3434057/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Integrable 2d sigma models: RG flow and deformations
DTSTART;VALUE=DATE-TIME:20190604T100000Z
DTEND;VALUE=DATE-TIME:20190604T110000Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3434427@indico.cern.ch
DESCRIPTION:Speakers: Arkady Tseytlin (Imperial College London)\nI will di
scuss some examples of deformations of 2d metrics under\nRG flow. Based
on on-going work with Ben Hoare and Nat Levine.\nhttps://indico.cern.ch/ev
ent/801146/contributions/3434427/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3434427/
END:VEVENT
BEGIN:VEVENT
SUMMARY:T-duality equivalences beyond string theory
DTSTART;VALUE=DATE-TIME:20190604T134500Z
DTEND;VALUE=DATE-TIME:20190604T143000Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3434059@indico.cern.ch
DESCRIPTION:Speakers: Alejandro Vilar López (IGFAE (Santiago de Compostel
a))\nIt is a known fact that the leading order low-energy effective action
of string theory is symmetric under T-duality transformations (Buscher ru
les)\, and although these are such that geometric properties of solutions
may change substantially they still preserve the Hawking temperature and e
ntropy of black holes. The question naturally arises whether or not this h
olds when one includes higher-order corrections. In this work we present a
two parameter family of actions constructed using DFT techniques which co
ntains the first-order corrected actions of string theories for some value
s of the parameters\, and derive the corrected T-duality rules. Then we sh
ow that temperature and entropy of solutions with black hole horizons are
preserved under the corrected rules\, and this is so even for values of th
e parameters which do not correspond to effective string theory actions\,
indicating that T-duality might also provide physical equivalences in case
s which do not have a known sigma model.\nhttps://indico.cern.ch/event/801
146/contributions/3434059/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3434059/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Exceptional Geometry of supersymmetric AdS vacua and their consist
ent truncations
DTSTART;VALUE=DATE-TIME:20190605T130000Z
DTEND;VALUE=DATE-TIME:20190605T140000Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3430837@indico.cern.ch
DESCRIPTION:Speakers: Emanuel Malek (AEI Potsdam)\nI will show how excepti
onal field theory (ExFT) can be used to construct supersymmetric AdS vacua
of 10-/11-d SUGRA and their consistent truncations. I will focus on the c
lass of infinitely-many supersymmetric AdS_7 vacua of massive IIA and AdS_
6 vacua of IIB and show how ExFT immediately leads to the "minimal" consis
tent truncation around these vacua in which only the gravitational supermu
ltiplet is kept. I will also show that there are no consistent truncations
with vector multiplets for the AdS_7 vacua with Roman's mass and give pre
cise differential conditions for the AdS_6 vacua of IIB to allow consisten
t truncations vector multiplets.\nhttps://indico.cern.ch/event/801146/cont
ributions/3430837/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3430837/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Aspects of gauge-strings duality
DTSTART;VALUE=DATE-TIME:20190603T143000Z
DTEND;VALUE=DATE-TIME:20190603T153000Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3426992@indico.cern.ch
DESCRIPTION:Speakers: Carlos Nuñez (Swansea University)\nWe discuss some
recent developments in the duality between gauge fields and strings. In pa
rticular\, focusing on conformal field theories in diverse dimensions and
with different amounts of supersymmetry\, we comment on their string duals
\, the calculation of various physical observables and the possibility of
finding classical integrability on the dual string wolrdsheet.\nhttps://in
dico.cern.ch/event/801146/contributions/3426992/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3426992/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Spin-2 excitations in Gaiotto-Maldacena solutions
DTSTART;VALUE=DATE-TIME:20190604T150000Z
DTEND;VALUE=DATE-TIME:20190604T154500Z
DTSTAMP;VALUE=DATE-TIME:20210619T120300Z
UID:indico-contribution-3434061@indico.cern.ch
DESCRIPTION:Speakers: José Manuel Penín Ascariz (IGFAE (Santiago de Comp
ostela))\nIn this talk\, I will present the results for the computation of
the spin-2 excitations for a class of N=2 supersymmetric solutions of typ
e IIA supergravity found by Gaiotto and Maldacena. The mass spectrum of th
ese excitations can be derived by solving a second order partial different
ial equation. In our work\, we consider as specific exampkes the Abelian a
nd non-Abelian T-dual versions of AdS5xS5 and we study the mass spectra. F
or the modes that do not 'feel' the non-Abelian T-duality transforamtion\,
we can provide analytical formulas for the masses\, while for the rest we
can only derive the spectra numerically. The numerical values that corres
pond to large masses are compared with WKB formulas. We also find a lower
bound for the masses.\nhttps://indico.cern.ch/event/801146/contributions/3
434061/
LOCATION:Rooms: 5\, 7\, 130 and 140 (Facultade de Física\, Universidade d
e Santiago de Compostela)
URL:https://indico.cern.ch/event/801146/contributions/3434061/
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