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BEGIN:VEVENT
SUMMARY:Cumrun Vafa (Harvard)
DTSTART:20200514T160000Z
DTEND:20200514T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/1
DESCRIPTION:Title: Cobordism classes\, baby universes and the swampland\nby Cumr
un Vafa (Harvard) as part of QFT and Geometry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Clay Cordova (Chicago)
DTSTART:20200528T160000Z
DTEND:20200528T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/2
DESCRIPTION:Title: Line Defect Quantum Numbers and Anomalies\nby Clay Cordova (C
hicago) as part of QFT and Geometry\n\n\nAbstract\nI will describe a class
of discrete anomalies of quantum field theories and explain how they are
closely related to the statistics of line defects. Based on work in progre
ss with Brennan and Dumitrescu.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nathan Seiberg (IAS)
DTSTART:20200611T160000Z
DTEND:20200611T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/3
DESCRIPTION:Title: TBA\nby Nathan Seiberg (IAS) as part of QFT and Geometry\n\nA
bstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Atish Dabholkar (ICTP)
DTSTART:20200625T160000Z
DTEND:20200625T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/4
DESCRIPTION:Title: TBA\nby Atish Dabholkar (ICTP) as part of QFT and Geometry\n\
nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Irene Valenzuela (Harvard)
DTSTART:20200709T160000Z
DTEND:20200709T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/5
DESCRIPTION:Title: Nothing is certain in string compactifications\nby Irene Vale
nzuela (Harvard) as part of QFT and Geometry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Abhijit Gadde (TIFR)
DTSTART:20200723T160000Z
DTEND:20200723T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/6
DESCRIPTION:Title: Modularity of supersymmetric partition functions\nby Abhijit
Gadde (TIFR) as part of QFT and Geometry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tudor Dimofte (UCDavis)
DTSTART:20200806T160000Z
DTEND:20200806T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/7
DESCRIPTION:Title: Holomorphic twists and boundary vertex algebras\nby Tudor Dim
ofte (UCDavis) as part of QFT and Geometry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Natalie Paquette (Caltech)
DTSTART:20200716T160000Z
DTEND:20200716T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/8
DESCRIPTION:Title: Koszul duality in field theory & holography\nby Natalie Paque
tte (Caltech) as part of QFT and Geometry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:QFT and Geometry Summer School
DTSTART:20200713T160000Z
DTEND:20200713T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/9
DESCRIPTION:by QFT and Geometry Summer School as part of QFT and Geometry\
n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nikolay Bobev (Leuven)
DTSTART:20200820T160000Z
DTEND:20200820T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/10
DESCRIPTION:Title: The Unreasonable Effectiveness of Higher-Derivative Supergravity
in AdS_4 Holography\nby Nikolay Bobev (Leuven) as part of QFT and Geo
metry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alba Grassi (SCGP/ETH)
DTSTART:20200903T160000Z
DTEND:20200903T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/11
DESCRIPTION:by Alba Grassi (SCGP/ETH) as part of QFT and Geometry\n\nAbstr
act: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gabi Zafrir (Milano)
DTSTART:20200917T160000Z
DTEND:20200917T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/12
DESCRIPTION:Title: An N=1 Lagrangian for an N=3 SCFT\nby Gabi Zafrir (Milano) a
s part of QFT and Geometry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Greg Moore (Rutgers)
DTSTART:20201001T160000Z
DTEND:20201001T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/13
DESCRIPTION:Title: Cecotti-Vafa Flavored Cones\nby Greg Moore (Rutgers) as part
of QFT and Geometry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hee-Cheol Kim (POSTECH)
DTSTART:20201015T130000Z
DTEND:20201015T140000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/14
DESCRIPTION:Title: 3d Topological Phases from M-theory (note unusual time!)\nby
Hee-Cheol Kim (POSTECH) as part of QFT and Geometry\n\n\nAbstract\nI will
present a novel M-theoretic approach of constructing 3d topological phase
s by establishing a correspondence between 3d topological field theories a
nd non-hyperbolic 3-manifolds. In this construction\, the topological phas
es emerge as macroscopic world-volume theories of M5-branes wrapped around
certain types of non-hyperbolic 3-manifolds. I will introduce a systemati
c algorithm for identifying the emergent topological phases from topologic
al data of the non-hyperbolic 3-manifolds\, and show that using this const
ruction all the known unitary bosonic TQFTs up to rank 4 can be geometrica
lly realized.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Emily Nardoni (UCLA)
DTSTART:20201112T160000Z
DTEND:20201112T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/15
DESCRIPTION:Title: From SU(N) Seiberg-Witten Theory to Adjoint QCD\nby Emily Na
rdoni (UCLA) as part of QFT and Geometry\n\n\nAbstract\nStandard lore sugg
ests that four-dimensional SU(N) gauge theory with 2 massless adjoint Weyl
fermions ("adjoint QCD") flows to a phase with confinement and chiral sym
metry breaking. In this talk\, I will describe how to obtain adjoint QCD f
rom SU(N) Seiberg-Witten theory by deforming the latter with a soft supers
ymmetry-breaking mass for the adjoint scalars. I will show how qualitative
features of the expected adjoint QCD phase are captured semi-classically
using a Lagrangian that originates from the multi-monopole points of Seibe
rg-Witten theory upon soft SUSY-breaking. This Lagrangian also suggests th
e existence of intermediate phases\, separated by first order phase transi
tions\, that interpolate between the Coulomb phase of Seiberg-Witten theor
y and the confining\, chiral symmetry breaking phase expected for adjoint
QCD.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Fei Yan (Rutgers)
DTSTART:20201029T160000Z
DTEND:20201029T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/16
DESCRIPTION:Title: Protected spin characters\, link invariants and exact WKB\nb
y Fei Yan (Rutgers) as part of QFT and Geometry\n\n\nAbstract\nIn this tal
k I will describe the construction of a new link "invariant" (with possibl
e wall-crossing behaviors) for links L in a 3-manifold M\, where M is a su
rface times the real line. This construction computes familiar link invari
ants in a new way\, furthermore it unifies that computation with the compu
tation of (framed) protected spin characters counting ground states with s
pin for supersymmetric line defects in 4d N=2 theories of class-S. I will
also mention possible extensions to general 3-manifolds M that admit a tri
angulation with tetrahedrons. Finally I will describe some applications of
this construction\, in particular to a possible extension of the exact WK
B method in 4d N=2 theories. This talk is based on past and ongoing work w
ith Andrew Neitzke\, as well as ongoing work with Gregory Moore and Andrew
Neitzke.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mini-Workshop QFT and Geometry
DTSTART:20201203T160000Z
DTEND:20201203T193000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/17
DESCRIPTION:Title: Mini-Workshop QFT and Geometry\nby Mini-Workshop QFT and G
eometry as part of QFT and Geometry\n\n\nAbstract\nhttps://sites.google.co
m/view/qftandgeometryseminars/mini-workshop\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Craig Lawrie (University of Pennsylvania)
DTSTART:20201210T170000Z
DTEND:20201210T180000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/18
DESCRIPTION:Title: 4d N=2 SCFTs from 6d (1\,0) on T^2 and Class S\nby Craig Law
rie (University of Pennsylvania) as part of QFT and Geometry\n\n\nAbstract
\nI will compare two constructions of 4d N=2 SCFTs from 6d: compactifying
(2\,0) SCFTs on a punctured Riemann surface\, and compactifying (1\,0) SCF
Ts on a torus. We find that every theory obtained from compactifying the (
2\,0) theories on a three punctured sphere\, with one simple puncture\, ca
n be alternatively realized by a torus compactification of a (1\,0) SCFT.
The 6d (1\,0) SCFTs of relevance are all Higgs branch RG-flows/complex str
ucture deformations of conformal matter and this structure is replicated v
ia Coulomb branch flows amongst the resulting 4d theories. I will discuss
the geometric construction of 6d (1\,0) SCFTs and how to determine the cen
tral charges and global symmetries of the torus compactification\; the nec
essary data to match to the class S formulation. Finally\, I will explicit
ly describe the overlap between the two constructions.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/18/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mini-Workshop QFT and Geometry
DTSTART:20201204T160000Z
DTEND:20201204T193000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/19
DESCRIPTION:Title: Mini-Workshop QFT and Geometry\nby Mini-Workshop QFT and G
eometry as part of QFT and Geometry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/19/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Elli Pomoni (DESY)
DTSTART:20210114T170000Z
DTEND:20210114T180000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/20
DESCRIPTION:Title: Type-B Anomalies on the Higgs Branch\nby Elli Pomoni (DESY)
as part of QFT and Geometry\n\n\nAbstract\nIn this talk we will study type
-B conformal anomalies associated with 1/2-BPS Coulomb-branch operators in
4D N=2 SCFTs. We will derive the\nconditions under which these anomalies
can match across the conformal phase and the Higgs phase\, and explicitly
see them at work in concrete\nexamples of both matching and non-matching.
On the one hand matching leads to a new class of data on the Higgs branch
of 4D N=2 SCFTs that are exactly computable. On the other\, non-matching i
mposes novel restrictions on the holonomy of the conformal manifold.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/20/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Davide Gaiotto (Perimeter)
DTSTART:20210128T170000Z
DTEND:20210128T180000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/21
DESCRIPTION:Title: Vertex operators and screening charges as gauge-invariant brane
intersections in twisted M-theory.\nby Davide Gaiotto (Perimeter) as p
art of QFT and Geometry\n\n\nAbstract\nI will discuss my work on the \\Ome
ga-deformation of brane\nintersections in M-theory and its relation to ver
tex algebras.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/21/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kazuya Yonekura (Tohoku)
DTSTART:20210211T150000Z
DTEND:20210211T160000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/22
DESCRIPTION:Title: Topological violation of global symmetries in quantum gravity\nby Kazuya Yonekura (Tohoku) as part of QFT and Geometry\n\n\nAbstract\n
We discuss a topological reason why global symmetries are not conserved in
quantum gravity\, at least when the symmetry comes from compactification
of a higher form symmetry. The mechanism is purely topological and does no
t require any explicit breaking term in the UV Lagrangian. Local current c
onservation does not imply global charge conservation in a sum over geomet
ries in the path integral. We explicitly consider the shift symmetry of an
axion-like field which originates from the compactification of a p-form g
auge field. Our topological construction is motivated by the brane/black-b
rane correspondence\, brane instantons\, and an idea that virtual black br
anes of a simple kind may be realized by surgery on spacetime manifolds.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/22/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Du Pei (Harvard)
DTSTART:20210225T170000Z
DTEND:20210225T180000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/23
DESCRIPTION:Title: On the compactification of 6d theories\nby Du Pei (Harvard)
as part of QFT and Geometry\n\n\nAbstract\nThe existence of quantum field
theories in higher dimensions leads to many interesting predictions in phy
sics and mathematics. In this talk\, I will discuss some general features
that arise when a 6d theory is compactified on a d-dimensional manifold\,
focusing on the interplay between symmetries\, anomalies\, and dynamics of
the resulting (6-d)-dimensional theory.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/23/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mario Martone (SCGP)
DTSTART:20210311T170000Z
DTEND:20210311T180000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/24
DESCRIPTION:Title: Geometric constraints on the space of 4d theories\nby Mario
Martone (SCGP) as part of QFT and Geometry\n\n\nAbstract\nThe geometry of
the moduli space of four dimensional superconformal theories is uniquely c
onstrained by complex \ngeometry and it thus represents an ideal set up fo
r a bottom up classification program. Recently\, great progress has been m
ade\nin relating the geometric data to the field theoretic one. I will pro
vide an update on the program\, explain these new results and \noutline a
variety of open questions.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/24/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dalimil Mazac (IAS)
DTSTART:20210325T160000Z
DTEND:20210325T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/25
DESCRIPTION:Title: Sharp Boundaries for the Swampland\nby Dalimil Mazac (IAS) a
s part of QFT and Geometry\n\n\nAbstract\nI will discuss the problem of bo
unding higher derivative couplings in consistent weakly coupled gravitatio
nal theories. The starting point will be general assumptions about analyti
city and Regge growth of the S-matrix. Higher derivative couplings are exp
ected to be of order one in the units of the UV cutoff. Our approach justi
fies this expectation and allows us to prove precise bounds on the order o
ne coefficients. I will explain that the notorious difficulties presented
by the graviton pole can be overcome by measuring couplings at small impac
t parameter\, rather than in the forward limit. I will illustrate the meth
od in theories containing a massless scalar coupled to gravity\, and in th
eories with maximal supersymmetry. My talk will be based on https://arxiv.
org/pdf/2102.08951.pdf\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/25/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Saebyeok Jeong (Rutgers)
DTSTART:20210422T160000Z
DTEND:20210422T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/26
DESCRIPTION:Title: Intersecting defects in gauge theory\nby Saebyeok Jeong (Rut
gers) as part of QFT and Geometry\n\n\nAbstract\nI will talk about interse
cting half-BPS surface defects in four-dimensional N=2 supersymmetric gaug
e theories. First\, I will introduce transversally intersecting surface de
fects from D3-branes on an orbifold. Then\, I will explain their correlati
on function satisfies a difference equation\, called fractional quantum T-
Q equation. I will discuss its implications on the correspondences with tw
o-dimensional conformal field theory and XXX spin chain system.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/26/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Marcos Marino (Geneva)
DTSTART:20210506T160000Z
DTEND:20210506T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/27
DESCRIPTION:Title: Peacock patterns\, or how to get integer invariants from perturb
ative series\nby Marcos Marino (Geneva) as part of QFT and Geometry\n\
n\nAbstract\nQuantum field and string theories often lead to perturbative
series \nwhich encode geometric information. In this talk I will argue tha
t\, in the case of complex \nChern-Simons theory and topological string th
eory\, these perturbative series \nsecretly encode integer invariants\, re
lated in some cases to BPS counting. \nThe framework which makes this rela
tion possible is the theory of resurgence\, where \nperturbative series le
ad to additional non-perturbative sectors. I’ll show that \nthe integer
invariants arise as Stokes constants of the resulting resurgent structure\
, \nin what we call a ``peacock pattern”. I will illustrate these claims
with explicit examples \nrelated to hyperbolic knots and toric Calabi-Yau
threefolds. \nFactorization in (anti)holomorphic blocks and the correspon
dence between topological strings and \nspectral theory turn out to play a
n important role in the story.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/27/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shamit Kachru (Stanford)
DTSTART:20210408T160000Z
DTEND:20210408T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/28
DESCRIPTION:Title: K3 metrics from string theory\nby Shamit Kachru (Stanford) a
s part of QFT and Geometry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/28/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Miguel Montero (Harvard)
DTSTART:20210520T160000Z
DTEND:20210520T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/29
DESCRIPTION:Title: Non-invertible global symmetries and completeness of the spectru
m\nby Miguel Montero (Harvard) as part of QFT and Geometry\n\n\nAbstra
ct\nIt is commonly believed that there are no global symmetries in quantum
gravity\, and also that the spectrum of charged states is complete. It is
also common lore that these two properties are related or equivalent. I w
ill explore this question in the context of quantum field theory\, explici
tly showing examples which have an incomplete spectrum\, but no ordinary
global symmetries. However\, these examples have non-invertible topologica
l operators\; demanding their absence restores completeness of the spectru
m. I will discuss how this equivalence between completeness of the spectru
m and absence of non-invertible symmetries can be established rigorously f
or electric states in gauge theory\, for any compact (even disconnected) g
auge group\, and for twist vortices (codimension-2 objects related to Guko
v-Witten operators). I will also briefly comment on the situation for non-
compact gauge groups\, theories with Chern-Simons terms\, and the motivati
on for the absence of non-invertible topological operators in gravity.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/29/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michele del Zotto (Uppsala)
DTSTART:20210603T160000Z
DTEND:20210603T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/30
DESCRIPTION:Title: Geometric Engineering and Correspondences\nby Michele del Zo
tto (Uppsala) as part of QFT and Geometry\n\n\nAbstract\nThe prediction of
the existence of correspondences among QFTs is one the many interesting a
pplications of higher dimensional SCFTs. In this talk\, I will discuss a s
trategy to predict further correspondences which is rooted in geometric en
gineering. Several examples and applications will be presented. In particu
lar\, I will discuss some aspects of a recently found 5d/7d correspondence
that links higher Donaldson-Thomas theory to 5d SCFT partition functions
on multicentered Taub-NUT spaces.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/30/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Edward Witten (IAS)
DTSTART:20210610T160000Z
DTEND:20210610T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/31
DESCRIPTION:Title: Black Hole Thermodynamics\, Then and Now\nby Edward Witten (
IAS) as part of QFT and Geometry\n\n\nAbstract\nI will review some the hig
h points of black hole thermodynamics as it developed in the 1970's\, and
then try to give at least a hint of modern developments that involve a mic
roscopic definition of entropy.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/31/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Justin Kaidi (SCGP)
DTSTART:20210708T160000Z
DTEND:20210708T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/32
DESCRIPTION:Title: Obstructions to Gapped Boundaries in (2+1)d TQFT\nby Justin
Kaidi (SCGP) as part of QFT and Geometry\n\n\nAbstract\nNot all 2+1-dimens
ional TQFTs admit topological boundary conditions. A familiar necessary\,
but not sufficient\, condition for the existence of a topological boundary
is the vanishing of the chiral central charge (mod 8). In this talk I wil
l discuss generalizations of the chiral central charge known as ``higher
” central charges. These quantities can be used to give necessary and su
fficient conditions for the existence of topological boundary conditions f
or Abelian TQFTs\, providing a highly-computable alternative to conditions
known previously in the literature.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/32/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mina Aganagic (Berkeley)
DTSTART:20210805T160000Z
DTEND:20210805T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/33
DESCRIPTION:Title: Knot Homology from Mirror Symmetry\nby Mina Aganagic (Berkel
ey) as part of QFT and Geometry\n\n\nAbstract\nKhovanov showed\, more than
20 years ago\, that there is a deeper theory underlying the Jones polynom
ial. The``knot categorification problem” is to find a uniform descriptio
n of this theory\, for all gauge groups\, which originates from physics. I
found two solutions to this problem\, related by a version of two dimensi
onal (homological) mirror symmetry. They are based on two descriptions of
the theory that lives on defects of the six dimensional (0\,2) CFT\, which
are supported on a link times ``time”. \n\nIn this talk\, I will focus
on the description in terms of A-branes\, which is new and surprising. (Wh
ile the B-brane description is new as well\, it shares flavors of theories
mathematicians discovered earlier.) The theory turns out to be solvable e
xplicitly\, in terms of a simpler cousin of a KRLW algebra.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/33/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Constantin Teleman (Berkeley)
DTSTART:20210902T160000Z
DTEND:20210902T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/34
DESCRIPTION:Title: Topological gauge theory in 2 and 3 dimension\nby Constantin
Teleman (Berkeley) as part of QFT and Geometry\n\n\nAbstract\nIn this sur
vey\, I will review two approaches to the subject\, via the curved Cartan
complex and the Toda integrable system\, with examples.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/34/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lakshya Bhardwaj (Oxford)
DTSTART:20210916T160000Z
DTEND:20210916T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/35
DESCRIPTION:Title: An Overview of the Recent Developments in 5d SCFTs Using Surface
Geometries\nby Lakshya Bhardwaj (Oxford) as part of QFT and Geometry\
n\n\nAbstract\nI will provide an overview (geared towards non-experts) of
the recent developments in understanding the classification and (generaliz
ed) global symmetries of 5d superconformal field theories (SCFTs). I will
be focusing mainly on the developments made possible by studying surface g
eometries associated to these 5d SCFTs\, which encode the rich physics ass
ociated to the Coulomb branch of vacua of 5d SCFTs.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/35/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jerome Gauntlett (Imperial College)
DTSTART:20210930T160000Z
DTEND:20210930T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/36
DESCRIPTION:Title: Branes Wrapped on Spindles\nby Jerome Gauntlett (Imperial Co
llege) as part of QFT and Geometry\n\n\nAbstract\nWe discuss a new landsca
pe of holographic SCFTs associated with branes wrapped on a spindle. A spi
ndle is a specific two dimensional orbifold: a two sphere with quantised c
onical deficits at each of the poles. We construct solutions describing th
e wrapped branes in gauged supergravity and then uplift them to D=10 and D
=11 supergravity. Remarkably\, supersymmetry is not realised by the standa
rd topological twist and\, furthermore\, in some case the higher dimension
al solutions are free from all orbifold singularities. For the case of D3
and M5 branes wrapping spindles we calculate the central charge of the CFT
that arises both from the gravity solution and from a field theory comput
ation and find exact agreement. For the case of M2 branes there is an inte
resting connection with D=4 accelerating black holes.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/36/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Daniel Robbins (Albany)
DTSTART:20211014T160000Z
DTEND:20211014T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/37
DESCRIPTION:Title: Decomposition in orbifolds\, quantum symmetries\, and anomalies<
/a>\nby Daniel Robbins (Albany) as part of QFT and Geometry\n\n\nAbstract\
nIn the context of 2D CFT\, decomposition occurs when we construct an orbi
fold of a theory by gauging a group G that has a trivially-acting subgroup
K. The resulting theory is a disjoint union of orbifolds by subgroups of
the effective G/K symmetry. We'll generalize this old story by first tur
ning on discrete torsion\, and then observing that there are even more pha
ses that can be introduced by exploiting the fact that K acts trivially.
These phases sometimes let us gauge G even when it has an anomaly\, or let
us extend an anomalous group to something we can gauge.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/37/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Noppadol Mekareeya (Milano)
DTSTART:20211028T160000Z
DTEND:20211028T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/38
DESCRIPTION:Title: Argyres-Douglas theories: Conformal manifolds and 3d mirror theo
ries\nby Noppadol Mekareeya (Milano) as part of QFT and Geometry\n\n\n
Abstract\nArgyres-Douglas (AD) theories constitute an infinite class of 4d
N=2 superconformal field theories with a number of interesting properties
. A distinctive feature of these theories is the presence of Coulomb branc
h operators of fractional dimension. In this talk\, we discuss several new
aspects of such theories\, including their conformal manifolds\, structur
es of the Higgs branch\, as well as the 3d gauge theories that arise from
dimensional reduction on a circle. As a by-product of the latter\, we pre
sent a number of dualities between 3d N=4 gauge theories coming from the r
eduction of AD theories that belong to different classes but are equivalen
t to each other.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/38/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alberto Zaffaroni (Milano)
DTSTART:20211209T170000Z
DTEND:20211209T180000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/40
DESCRIPTION:Title: Large N factorization and holography\nby Alberto Zaffaroni (
Milano) as part of QFT and Geometry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/40/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tom Rudelius (Berkeley)
DTSTART:20211111T170000Z
DTEND:20211111T180000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/41
DESCRIPTION:Title: Geometric Implications of the Weak Gravity Conjecture\nby To
m Rudelius (Berkeley) as part of QFT and Geometry\n\n\nAbstract\nThe Weak
Gravity Conjecture holds that in any consistent theory of quantum gravity\
, gravity must be the weakest force. This simple proposition has surprisin
gly nontrivial physical consequences\, which in the case of supersymmetric
string/M-theory compactifications lead to nontrivial geometric consequenc
es for Calabi-Yau manifolds. In this talk we will describe these conjectur
ed geometric consequences in detail and show how they are realized in conc
rete examples\, deriving new results about 5d supersymmetric black holes i
n the process.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/41/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mariana Grana (Saclay)
DTSTART:20220224T170000Z
DTEND:20220224T180000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/42
DESCRIPTION:Title: The tadpole problem\nby Mariana Grana (Saclay) as part of QF
T and Geometry\n\n\nAbstract\nOne of the biggest problems in string compac
tifications is the large number of massless fields associated to deformati
ons of the internal geometry. These “moduli” get masses from fluxes w
rapping non-trivial cycles on the manifold. Fluxes have an associated char
ge\, which on a compact manifold has to satisfy tadpole cancelation condit
ions. The tadpole conjecture proposes that the charge induced by the flux
es needed to stabilise a large number of moduli grows linearly with the nu
mber of moduli. In this talk I will explain the conjecture\, present its m
otivation\, supporting evidence and consequences.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/42/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Miranda Cheng (Amsterdam)
DTSTART:20220120T160000Z
DTEND:20220120T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/43
DESCRIPTION:Title: 3d Manifolds\, Log VOAs and Quantum Modular Forms\nby Mirand
a Cheng (Amsterdam) as part of QFT and Geometry\n\n\nAbstract\nThe q-serie
s 3-manifold invariants provide new insights and computational tools in 3-
manifold topology\, 3d SQFT\, and M-theory compactifications. In this talk
I will survey the relation between these q-series 3-manifold invariants\,
(logarithmic) VOAs\, and quantum modular forms.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/43/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Eric Perlmutter (Saclay)
DTSTART:20220310T170000Z
DTEND:20220310T180000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/44
DESCRIPTION:Title: Harnessing S-Duality in N=4 SYM & Supergravity as SL(2\,Z)-Avera
ged Strings\nby Eric Perlmutter (Saclay) as part of QFT and Geometry\n
\n\nAbstract\nI will talk about this paper\, written with Scott Collier: h
ttps://arxiv.org/abs/2201.05093\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/44/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Simeon Hellerman (Kavli IPMU)
DTSTART:20220331T160000Z
DTEND:20220331T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/46
DESCRIPTION:Title: Precision Correlators at Large R-Charge\nby Simeon Hellerman
(Kavli IPMU) as part of QFT and Geometry\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/46/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Thomas Grimm (Utrecht)
DTSTART:20220421T160000Z
DTEND:20220421T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/47
DESCRIPTION:Title: Tame geometry in QFTs and String Theory\nby Thomas Grimm (Ut
recht) as part of QFT and Geometry\n\n\nAbstract\nIn this talk I will intr
oduce a generalized notion of finiteness and argue that it appears in many
well-understood string theory effective theories and in perturbative QFTs
. The underlying mathematical foundation is described by the tame geometry
that is built from o-minimal structures. I will briefly introduce this fa
scinating field of mathematics which is linking geometry and logic. I will
then use some of the remarkable recent results from this field to discuss
the tameness of (1) supergravity theories with N>=4\, (2) flux compactifi
cations of string theory\, and (3) general n-loop QFT amplitudes. To frame
these observations\, I will propose a Tameness Conjecture that claims tha
t consistent effective theories that can be coupled to gravity have to be
tame.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/47/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michela Petrini (Paris)
DTSTART:20220616T160000Z
DTEND:20220616T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/48
DESCRIPTION:Title: The supergravity duals of deformed N=1 SCFT’s\nby Michela
Petrini (Paris) as part of QFT and Geometry\n\n\nAbstract\nWe address the
long-standing problem of determining the gravity dual of generic deformati
ons of 4d N=1 super-conformal field theories. Using the language of genera
lised geometry we show how the geometry of the supergravity backgrounds ca
n be described in terms of generalised structures that encodes the holomor
phic structure of the dual field theories. Even if we are not able to give
the supergravity solutions in an explicit form\, we give a proof-of-exis
tence of such backgrounds and we show how to compute chiral rings\, moduli
and Hilbert series for the deformed field theories.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/48/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shu-Heng Shao (Stony Brook)
DTSTART:20220602T160000Z
DTEND:20220602T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/49
DESCRIPTION:Title: Non-invertible Global Symmetries in the Standard Model\nby S
hu-Heng Shao (Stony Brook) as part of QFT and Geometry\n\n\nAbstract\nWe i
dentify infinitely many non-invertible generalized global symmetries in QE
D and QCD for the real world in the massless limit. In QED\, while there
is no conserved Noether current for the axial symmetry because of the AB
J anomaly\, for every rational angle\, we construct a conserved and gauge-
invariant topological symmetry operator. Intuitively\, it is a compositio
n of the axial rotation and a fractional quantum Hall state coupled to the
electromagnetic U(1) gauge field. These conserved symmetry operators do
not obey a group multiplication law\, but a non-invertible fusion algebra
over TQFT coefficients. These non-invertible symmetries lead to selection
rules\, which are consistent with the scattering amplitudes in QED. We fu
rther generalize our construction to QCD\, and show that the neutral pion
decay can be understood from a matching condition of the non-invertible g
lobal symmetry.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/49/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Philip Argyres (Cincinnati)
DTSTART:20220630T160000Z
DTEND:20220630T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/50
DESCRIPTION:Title: Vertex algebra of extended operators in 4d N=2 SCFTs\nby Phi
lip Argyres (Cincinnati) as part of QFT and Geometry\n\n\nAbstract\nThe lo
cal Schur operators of a 4d N=2 unitary SCFT form a vertex operator algebr
a. We construct a set of extended (line\, surface\, etc.) operators in twi
sted Schur cohomology by descent. They form a vertex algebra\, extending t
he vertex operator algebra of the Schur operators.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/50/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Boris Pioline (Paris)
DTSTART:20221020T160000Z
DTEND:20221020T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/51
DESCRIPTION:by Boris Pioline (Paris) as part of QFT and Geometry\n\n\nAbst
ract\nThe spectrum of BPS states in N=2 string vacua famously jumps across
codimension-one walls in vector multiplet moduli space. The Split Attract
or Flow Conjecture postulates that the BPS index $\\Omega(\\gamma\,z)$ for
given charge $\\gamma$ and moduli $z$ can be reconstructed from the `attr
actor indices’ $\\Omega_*(\\gamma_i)$ counting BPS states of charge $\\g
amma_i$ in their respective attractor chamber\, by summing over all possib
le decompositions $\\gamma=\\sum_i \\gamma_i$ and over decorated rooted fl
ow trees. Physically\, flow trees provide a mesoscopic representation of B
PS states as nested multi-centered bound states of elementary constituents
. In this talk I will outline a proof of the SAFC for local $P^2$\, arguab
ly the simplest non-trivial example of Calabi-Yau threefold. \nwhere the f
ull set attractor indices can be determined. A key role is played by scatt
ering diagrams\, which appear to be the correct mathematical formalism for
the SAFC for non-compact CY threefolds. I will illustrate how this techno
logy can be used to determine the chamber structure for any charge. This i
s work in collaboration with Pierrick Bousseau\, Pierre Descombes and Brun
o Le Floch\, to appear on arXiv soon.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/51/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sheldon Katz (UIUC)
DTSTART:20220811T160000Z
DTEND:20220811T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/52
DESCRIPTION:by Sheldon Katz (UIUC) as part of QFT and Geometry\n\nAbstract
: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/52/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sheldon Katz (UIUC)
DTSTART:20220908T160000Z
DTEND:20220908T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/53
DESCRIPTION:by Sheldon Katz (UIUC) as part of QFT and Geometry\n\nAbstract
: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/53/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sheldon Katz (UIUC)
DTSTART:20221006T160000Z
DTEND:20221006T170000Z
DTSTAMP:20260404T131143Z
UID:QFTandGeo/54
DESCRIPTION:Title: Topological String Partition Function on Noncommutative Resoluti
ons\nby Sheldon Katz (UIUC) as part of QFT and Geometry\n\n\nAbstract\
nThis talk focuses on the Gopakumar-Vafa invariants of noncommutative reso
lutions of compact Calabi-Yau threefolds with conifolds which do not admit
a Kahler small resolution. I present and give evidence for a proposal f
or computing these GV invariants using the enumerative geometry of all sma
ll resolutions considered simultaneously. The "Kahler" moduli space of an
y small resolution X splits into disjoint copies corresponding to fraction
al B-fields along the exceptional P^1s and indexed by the torsion subgroup
of H^3(X\,Z). In this way\, we get multiple large radius limits\, leadin
g to multiple partition functions\, all determined by the Gopakumar-Vafa i
nvariants. The partition functions can be computed in many cases by B-mod
el techniques on different mirrors corresponding to different choices of t
he fractional B-field. The main example discussed in this talk is Kuznetso
v's noncommutative resolution of the double cover of P^3 branched along a
degree 8 determinantal hypersurface. Many of the GV invariants deduced fr
om the B-model partition functions can be confirmed by enumerative geometr
y of the small resolutions after showing that the exceptional P^1's all re
present 2-torsion classes in H_2(X\,Z). This talk is based on joint work i
n progress with Albrecht Klemm\, Thorsten Schimannek\, and Eric Sharpe.\n
LOCATION:https://stable.researchseminars.org/talk/QFTandGeo/54/
END:VEVENT
END:VCALENDAR