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BEGIN:VEVENT
SUMMARY:Gabriel Cuomo (Princeton U. & New York U.)
DTSTART:20250520T130000Z
DTEND:20250520T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/1
DESCRIPTION:Title: The Large Charge Sector of CFTs\nby Gabriel Cuomo (Princeton U. &
New York U.) as part of Quantum Theories of Fields\, Matter\, and Strings
\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alessandro Tomasiello (University of Milano-Bicocca)
DTSTART:20250527T130000Z
DTEND:20250527T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/2
DESCRIPTION:Title: Defects in 6d SCFTs Leading to 4d N=1 Models\nby Alessandro Tomas
iello (University of Milano-Bicocca) as part of Quantum Theories of Fields
\, Matter\, and Strings\n\n\nAbstract\nMany superconformal field theories
in four dimensions can be obtained by compactifying parent 6D theories on
Riemann surfaces. Using holography in massive IIA string theory\, I will p
rovide evidence that a large class of such models can be enriched by punct
ures\, generalizing the so-called Class S construction.\n\nTo get the Zoom
link yo can either fill out the following form or contact the organizer:
https://docs.google.com/forms/d/1KmOdB7a8Z3vH9mRJsPT9pr0Ej0Qj7dMI9I1JKEEiY
zI/viewform?edit_requested=true\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Markus Dierigl (CERN)
DTSTART:20250602T130000Z
DTEND:20250602T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/3
DESCRIPTION:Title: Exploring Utopia\nby Markus Dierigl (CERN) as part of Quantum The
ories of Fields\, Matter\, and Strings\n\n\nAbstract\nIn this talk we will
explore different topological charges of supergravity theories supported
by a non-trivial U-duality bundle. In case these charges would be conserve
d\, they would lead to global symmetries\, which we believe to be absent i
n any consistent theory of quantum gravity. With the UV completions of str
ing and M-theory at hand we explore\, which kind of UV objects are necessa
ry to break all global symmetries in the IR supergravity theory. This lead
s to interesting string backgrounds including higher-dimensional superconf
ormal field theories\, twisted compactifications\, and non-geometric defe
cts.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anatoly Dymarsky (University of Kentucky)
DTSTART:20250612T130000Z
DTEND:20250612T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/4
DESCRIPTION:Title: Subsystem Entropy in 2d CFT and the Diagonal Approximation\nby An
atoly Dymarsky (University of Kentucky) as part of Quantum Theories of Fie
lds\, Matter\, and Strings\n\n\nAbstract\nEntanglement entropy is a key qu
antity in quantum many-body physics\, yet its computation remains challeng
ing outside of special cases. In this talk\, I will present a method based
on the diagonal approximation\, rooted in the subsystem Eigenstate Therma
lization Hypothesis (ETH)\, for evaluating the entanglement entropy of exc
ited states and thermal ensembles in the large-subsystem limit. Applying t
his framework to two-dimensional conformal field theories (2D CFTs)\, we s
how that it reproduces known results for canonical and microcanonical ense
mbles and individual primary states\, while also yielding new predictions
for KdV generalized Gibbs ensembles. Our approach resolves tensions betwee
n explicit CFT computations and ETH expectations\, providing indirect supp
ort for the generalized ETH in 2D CFTs.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:F. Nur Ünal (University of Cambridge & University of Birmingham)
DTSTART:20250627T130000Z
DTEND:20250627T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/5
DESCRIPTION:Title: Topology and Obstruction in Multi-level Systems\nby F. Nur Ünal
(University of Cambridge & University of Birmingham) as part of Quantum Th
eories of Fields\, Matter\, and Strings\n\n\nAbstract\nWhile the landscape
of free-fermion topological phases has drastically been expanded in the l
ast decades\, recently novel multi-gap topological phases have been discov
ered with non-Abelian braiding properties of band singularities. In system
s with C2T or PT symmetry\, the ability of these band nodes to annihilate
pairwise is path dependent\, and the sign of their charges can be changed
by braiding nodes in adjacent gaps. I will present non-Abelian frame charg
es associated with band nodes and discuss their observable signatures. I w
ill talk about the effects of the non-Bravais lattice configuration and ob
struction on the multi-gap topological Euler invariant\, illustrate physic
al signatures of these non-trivial Brillouin zone boundary conditions.\n\n
PRL 133\, 093404 (2024)\; Nat Comm 15\, 1144 (2024)\; PRL 125\, 053601 (
2020)\; Alsaiari et al\, to appear (2025)\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Xingyang Yu (Virginia Tech)
DTSTART:20250619T130000Z
DTEND:20250619T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/6
DESCRIPTION:Title: Non-invertible Symmetries via Subfactors: Conformal and Topological A
pplications\nby Xingyang Yu (Virginia Tech) as part of Quantum Theorie
s of Fields\, Matter\, and Strings\n\n\nAbstract\nNon-invertible symmetrie
s\, characterized by fusion categories rather than groups\, play a central
role in modern quantum field theory and topological phases of matter. In
this talk\, I will introduce a von Neumann subfactor approach to non-inver
tible symmetries in two dimensions. Subfactors encode fusion categorical d
ata—including symmetries\, module categories\, and dual symmetries—via
their bipartite principal graphs. I will explain how these structures nat
urally encode generalized gaugings and dualities\, and illustrate their ph
ysical implications in both conformal and topological settings. In particu
lar\, I will discuss new self-dualities in $c=1$ CFTs\, such as the except
ional orbifold $SU(2)_1/A_5$\, and present a classification of particle-so
liton degeneracies in gapped phases with various non-invertible symmetries
. This framework provides a concrete computational toolkit that bridges su
bfactor theory and physical non-invertible symmetries.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alfred Shapere (University of Kentucky)
DTSTART:20250722T130000Z
DTEND:20250722T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/7
DESCRIPTION:Title: Holography of Free Fields\nby Alfred Shapere (University of Kentu
cky) as part of Quantum Theories of Fields\, Matter\, and Strings\n\nAbstr
act: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrea Antinucci (University of Oxford)
DTSTART:20250703T130000Z
DTEND:20250703T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/8
DESCRIPTION:Title: Defect Conformal Manifolds from Phantom (Non-Invertible) Symmetries\nby Andrea Antinucci (University of Oxford) as part of Quantum Theories
of Fields\, Matter\, and Strings\n\n\nAbstract\nConformal defects have a
variety of physical applications\, serving for instance as universality cl
asses of impurities in critical systems. When they break a continuous symm
etry of the system\, they arise in families related by exactly marginal de
formations. While these defect conformal manifolds are interesting in thei
r own right\, many physical properties—such as the reflection coefficien
t—remain constant across the manifold. After reviewing these known facts
\, in this talk I will present a new mechanism through which defect confor
mal manifolds can arise even in the absence of broken continuous symmetrie
s. In this case\, physical properties are no longer constant along the man
ifold\, yet they remain calculable and exhibit interesting behaviour. I wi
ll illustrate this mechanism with examples in (1+1)D CFTs and comment on p
ossible generalizations to higher dimensions.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michele Cicoli (University of Bologna)
DTSTART:20250708T090000Z
DTEND:20250708T100000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/9
DESCRIPTION:Title: Recent Progress on Inflation and Dark Energy from String Theory\n
by Michele Cicoli (University of Bologna) as part of Quantum Theories of F
ields\, Matter\, and Strings\n\n\nAbstract\nI will review recent progress
in string cosmology. I will describe the main features of a class of model
s where the inflaton is a type IIB Kaehler modulus with an approximate shi
ft symmetry. I will illustrate how reheating can occur via the perturbativ
e decay of the modulus into visible and hidden degrees of freedom\, paying
attention to the production of dark radiation. I will discuss the status
of de Sitter vacua versus quintessence model building in string theory\, a
nalysing the level of control and the main challenges faced by models of d
ynamical dark energy. I will finally present a working model of axion hill
top quintessence in string theory.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Fiona Burnell (University of Minnesota)
DTSTART:20250821T150000Z
DTEND:20250821T160000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/10
DESCRIPTION:by Fiona Burnell (University of Minnesota) as part of Quantum
Theories of Fields\, Matter\, and Strings\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Niccolò Cribiori (KU Leuven)
DTSTART:20250715T130000Z
DTEND:20250715T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/11
DESCRIPTION:Title: Scale separation\, how (not)?\nby Niccolò Cribiori (KU Leuven)
as part of Quantum Theories of Fields\, Matter\, and Strings\n\n\nAbstract
\nThe existence of a separation of scales between the four observed spacet
ime dimensions and the yet unobserved additional ones is a minimal require
ment for (string) phenomenology. However\, explaining the origin of this p
roperty remains an open problem. In this talk\, I will explore both sides
of this issue. First\, I will present general bottom-up arguments suggesti
ng that scale separation is challenging to achieve\, if not impossible\, i
n broad classes of models. Then\, I will discuss top-down constructions of
fering potential avenues for scale separation. In either direction\, this
will demonstrate how\, among all the hierarchies in nature\, scale separat
ion is one for which concrete progress may be within reach.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ömer Mert Aksoy (MIT)
DTSTART:20250806T130000Z
DTEND:20250806T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/12
DESCRIPTION:Title: Spacetime symmetry-enriched SymTFT: LSM anomalies\, modulated symmet
ries and beyond\nby Ömer Mert Aksoy (MIT) as part of Quantum Theories
of Fields\, Matter\, and Strings\n\n\nAbstract\nSymmetry Topological Fiel
d Theory (SymTFT) is a framework that allows one to capture certain univer
sal properties of gapped and gapless phases of matter with a symmetry from
the perspective of topological field theory in one-higher dimension. This
approach has been very fruitful in understanding gapped and gapless phase
s with internal generalized symmetries\, their anomalies and dualities bet
ween them. In this talk\, I will describe one approach to extend the SymTF
T framework to incorporate spacetime symmetries. Concretely\, I will show
that a topological order that is enriched by spacetime symmetries can act
as a SymTFT that encodes the interplay between the spacetime and internal
symmetries. I will provide concrete examples focusing on symmetries in 1+1
D: lattice translations\, spatial reflections\, and time reversal. For lat
tice translations\, the interplay with internal symmetries is encoded in t
he SymTFT by translations permuting anyons\, which causes the continuum de
scription of the SymTFT to be a foliated field theory. I will show how thi
s construction reveals the relation between Lieb-Schultz-Mattis (LSM) anom
alies and modulated symmetries\, and classify modulated symmetry-protected
topological (SPT) phases. For reflection and time-reversal symmetries\, t
he interplay can additionally be encoded by symmetry fractionalization dat
a in the SymTFT\, which I will use to identify mixed anomalies and study g
auging for such examples.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Po-Shen Hsin (King's College London)
DTSTART:20250918T130000Z
DTEND:20250918T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/13
DESCRIPTION:Title: Application of Generalized Symmetry in Quantum Computation\nby P
o-Shen Hsin (King's College London) as part of Quantum Theories of Fields\
, Matter\, and Strings\n\n\nAbstract\nI will discuss applications of gener
alized symmetry in fault-tolerant quantum computation. Symmetry can serve
as logical gates in quantum codes\, and generalized symmetries provide wid
e variety of logical gates implemented by constant depth circuits.\nThese
logical gates are unitary operators given by symmetry-protected topologica
l responses labelled by group cohomology and can be expressed explicitly o
n the lattice using cohomology operations including cup product\, Steenrod
squares and new combinations of higher cup products called higher Pontrya
gin powers. Implementing these gates could make it more efficient to compi
le specific types of quantum algorithms such as Shor’s algorithm. We fur
ther extend the construction to quantum codes with boundaries\, which gene
ralizes the folding approach in color codes\, and generalize the discussio
n to good LDPC codes.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ling Lin (University of Bologna)
DTSTART:20250919T140000Z
DTEND:20250919T150000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/14
DESCRIPTION:Title: Revisiting Frozen Singularities in String and M-theory\nby Ling
Lin (University of Bologna) as part of Quantum Theories of Fields\, Matter
\, and Strings\n\n\nAbstract\nI will review the notion of frozen singulari
ties in compactifications of string and M-theory and their role in geometr
ic engineering as well as in the Swampland program. Then I will discuss so
me recent progress in understanding their generalized symmetries\, focusin
g on the specific case of M-theory compactifications to 7d.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yunqin Zheng (KITS\, UCAS)
DTSTART:20250926T130000Z
DTEND:20250926T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/15
DESCRIPTION:Title: On Continuous Non-Invertible Symmetries\nby Yunqin Zheng (KITS\,
UCAS) as part of Quantum Theories of Fields\, Matter\, and Strings\n\n\nA
bstract\nI will discuss the continuous non-invertible symmetries. As for c
ontinuous invertible symmetries\, the continuous non-invertible symmetries
exhibit a generalized Noether theorem\, which implies the existence of co
nserved currents\, but attached to a topological operator. I will explain
that such symmetries exist in many conformal field theories in 1+1d\, incl
uding c=1 CFTs\, WZW models\, and products of minimal models.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Edward Witten (Princeton\, Institute for Advanced Study)
DTSTART:20251006T130000Z
DTEND:20251006T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/16
DESCRIPTION:Title: Introduction to Black Hole Thermodynamics\nby Edward Witten (Pri
nceton\, Institute for Advanced Study) as part of Quantum Theories of Fiel
ds\, Matter\, and Strings\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pavel Putrov (ICTP)
DTSTART:20251017T140000Z
DTEND:20251017T150000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/17
DESCRIPTION:Title: Braidings on topological operators\, anomaly of higher-form symmetri
es and the SymTFT\nby Pavel Putrov (ICTP) as part of Quantum Theories
of Fields\, Matter\, and Strings\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Brandon Rayhaun (Princeton\, Inst. Advanced Study)
DTSTART:20251024T130000Z
DTEND:20251024T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/18
DESCRIPTION:Title: Anomalies of Defect Parameter Spaces and a Spin-Flux Duality\nby
Brandon Rayhaun (Princeton\, Inst. Advanced Study) as part of Quantum The
ories of Fields\, Matter\, and Strings\n\n\nAbstract\nI will explain how t
he irreversibility of the renormalization group together with anomalies\,
including anomalies in the space of coupling constants\, can be used to co
nstrain the IR phases of defects in familiar quantum field theories. As an
example\, I will use these techniques to provide evidence for a conjectur
al "spin-flux duality" which describes how certain line operators are mapp
ed across particle/vortex duality in 2+1d.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/18/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Eric Sharpe (Virginia Tech)
DTSTART:20251031T130000Z
DTEND:20251031T140000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/19
DESCRIPTION:Title: An Introduction to Decomposition\nby Eric Sharpe (Virginia Tech)
as part of Quantum Theories of Fields\, Matter\, and Strings\n\n\nAbstrac
t\nIn this talk\, I will outline higher-form symmetries in quantum field t
heories\, focusing on local d-dimensional theories with (d-1)-form symmetr
ies. Such theories are equivalent to disjoint unions of quantum field theo
ries\, an equivalence known as `decomposition\,' with the constituent subt
heories (analogous to but distinct from superselection sectors) known as u
niverses. I will outline some basic examples and applications\, including
to consistent anomaly restriction\, as well as recent results involving c
ontinuous families of universes.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/19/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Luca Ciambelli
DTSTART:20251107T150000Z
DTEND:20251107T160000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/20
DESCRIPTION:Title: The Language of Null Hypersurfaces: Luca Ciambelli\nby Luca Ciam
belli as part of Quantum Theories of Fields\, Matter\, and Strings\n\n\nAb
stract\nCarrollian physics provides a new geometric lens to describe light
like\, or null\, hypersurfaces. In this talk\, I will introduce the basic
tools and concepts in order to define the Carrollian structure and explain
how it naturally captures the intrinsic geometry of null manifolds. I wil
l then show how to induce this structure directly from an ambient spacetim
e\, and how the familiar geometric relations of general relativity\, such
as the Gauss-Codazzi equations and Einstein’s equations\, appear in this
setting. Along the way\, I will highlight connections with the BMS symmet
ry group and the emerging role of Carrollian structures in gravitational p
hysics and holography.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/20/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Meng Cheng (Yale University)
DTSTART:20251118T150000Z
DTEND:20251118T160000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/21
DESCRIPTION:Title: Mixed-state Topological Order in (2+1)d\nby Meng Cheng (Yale Uni
versity) as part of Quantum Theories of Fields\, Matter\, and Strings\n\n\
nAbstract\nGround states of gapped local Hamiltonians can be classified\,
up to quasi-local unitary equivalence\, by their underlying topological or
der. In 2+1 dimensions\, it is widely believed—and in some cases rigorou
sly established—that topological orders are fully characterized by their
topological line operators that generate 1-form symmetries\, up to stacki
ng with invertible states. Mathematically\, the topological line operators
form a modular tensor category.\n\nIn this talk\, I will discuss recent p
rogress on extending this framework to many-body mixed states. I will begi
n by reviewing the ground-state classification\, the role of 1-form symmet
ries\, and the physics of decohered topological states. I will then argue
that\, under an appropriate notion of equivalence for mixed states\, (2+1)
d mixed-state topological order is (partially) classified by premodular c
ategories.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/21/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Laura Donnay (SISSA\, Trieste)
DTSTART:20251127T090000Z
DTEND:20251127T100000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/22
DESCRIPTION:Title: Flat Holography and BMS Particles\nby Laura Donnay (SISSA\, Trie
ste) as part of Quantum Theories of Fields\, Matter\, and Strings\n\n\nAbs
tract\nDespite recent progress\, a complete formulation of a holographic c
orrespondence for flat spacetimes remains elusive.\n\nAny viable formulati
on should be based on a correspondence between bulk and boundary states bu
ilt upon the equivalence of unitary irreducible representations (UIRs) of
the asymptotic symmetry group of flat spacetimes\, the BMS group.\n\nAfter
an extended review on flat space holography\, I will present recent new r
esults that provide explicit wavefunctions for the UIRs of the BMS group (
the so-called BMS particles). I will outline prospects for defining an S-m
atrix for BMS states that is free from infrared divergences.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/22/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yuya Tanizaki (Kyoto University)
DTSTART:20251205T073000Z
DTEND:20251205T083000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/23
DESCRIPTION:Title: Confinement on $R^2 \\times T^2$ with ‘t Hooft Flux\, QCD Chiral L
agrangian and $\\eta'$\nby Yuya Tanizaki (Kyoto University) as part of
Quantum Theories of Fields\, Matter\, and Strings\n\n\nAbstract\n4d gauge
theories are strongly coupled at low energies\, and their\nanalytic compu
tations are quite tough problem. In recent years\, there was a\ndiscovery
that $4d$ QCD on $R^2 \\times T^2$ with the baryon-‘t Hooft flux accepts
\nweakly-coupled description with maintaining its interesting features: We
\ncan derive the chiral effective Lagrangian analytically with including t
he\n$\\eta'$ field. We then show that the $\\eta'$ vortex in this $2d$ set
up can be\nidentified as the quark itself\, and we discuss its connection
with\nKomargodski’s pancake baryon scenario.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/23/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ho-Tat Lam (University of Southern California)
DTSTART:20251209T163000Z
DTEND:20251209T173000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/24
DESCRIPTION:Title: Vertex Tube Algebras Meet Topological Defects\nby Ho-Tat Lam (Un
iversity of Southern California) as part of Quantum Theories of Fields\, M
atter\, and Strings\n\n\nAbstract\nChiral algebras and topological defects
represent two complementary notions of symmetries in two-dimensional conf
ormal field theory. In this talk\, we will explore the interplay between t
hese two fundamental concepts. In particular\, we will address three inter
connected questions: How does a chiral algebra act on the defect Hilbert s
paces? What happens to a chiral algebra after gauging? And how to incorpor
ate non-local chiral operators into chiral algebras? In answering these qu
estions\, we will reveal an intricate mathematical structure underlying tw
o-dimensional conformal field theories\, which we refer to as vertex tube
algebra\, that generalizes both the celebrated vertex operator algebra and
the tube algebra familiar from the study of non-invertible symmetries.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/24/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dieter Lüst (Ludwig Maximilians Universität Arnold Sommerfeld Ce
nter)
DTSTART:20251215T150000Z
DTEND:20251215T160000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/25
DESCRIPTION:Title: Quantum Gravity\, Strings and the Swampland\nby Dieter Lüst (Lu
dwig Maximilians Universität Arnold Sommerfeld Center) as part of Quantum
Theories of Fields\, Matter\, and Strings\n\n\nAbstract\nIn this talk\, I
will give a short introduction to Quantum Gravity and its realization by
String Theory.\nAs known for some time\, string theory predicts a huge lan
dscape of vacua\, seen as different effective theories at low energy. Howe
ver\, as it became evident during the recent years that the space of theor
ies that cannot originate from string theories is much larger than the lan
dscape\, and hence usually dubbed as the so-called swampland. I will discu
ss some of the properties of the swampland scenario and how it has recentl
y led to some predictions to test quantum gravity and string theory.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/25/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jun Madea (Kyoto University)
DTSTART:20251223T070000Z
DTEND:20251223T080000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/26
DESCRIPTION:Title: Twisted Partition Functions as Order Parameters\nby Jun Madea (K
yoto University) as part of Quantum Theories of Fields\, Matter\, and Stri
ngs\n\n\nAbstract\nFor quantum field theories with global symmetry\, we ca
n study the behavior of the partition function with the background gauge f
ield to diagnose different quantum phases. For the case of discrete symmet
ries\, we find that the symmetry-twisted partition function works as an or
der parameter that discriminates spontaneous symmetry breaking (SSB)\, sym
metry-protected topological (SPT) states\, and symmetry-enriched topologic
al (SET) states. We then consider its application to the case of 4d Yang-M
ills theory with adjoint matters to understand the relation between the tw
isted partition function and the Wilson–’t Hooft classification. We al
so study its behavior for the spontaneously broken U(1) symmetry and inter
pret the result from the viewpoint of the mixed anomaly with the emergent
solitonic symmetry.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/26/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alison Warman (University of Oxford)
DTSTART:20260115T150000Z
DTEND:20260115T160000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/27
DESCRIPTION:Title: Phases with Generalized Symmetries from the SymTFT\nby Alison Wa
rman (University of Oxford) as part of Quantum Theories of Fields\, Matter
\, and Strings\n\n\nAbstract\nThis talk will present the systematic explor
ation of quantum phases of matter with generalized (categorical) symmetrie
s\, by means of the "Symmetry Topological Field Theory" (SymTFT). After in
troducing the general framework\, I will discuss new examples of phases wi
th categorical symmetries\, including intrinsically gapless phases (which
cannot be deformed to gapped phases with analogous symmetry properties) an
d gapped phases in which the symmetry broken vacua carry distinct kinds of
topological order. Beyond pure state phases\, I will also illustrate how
to classify mixed-state gapped phases with non-invertible symmetries using
the SymTFT.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/27/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lorenzo Di Pietro (University of Trieste)
DTSTART:20260121T080000Z
DTEND:20260121T090000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/28
DESCRIPTION:Title: F-theorem for Quantum Field Theories on Anti-de Sitter Space\nby
Lorenzo Di Pietro (University of Trieste) as part of Quantum Theories of
Fields\, Matter\, and Strings\n\n\nAbstract\nAfter motivating the study of
quantum field theory on the rigid background of Anti-de Sitter space and
discussing the examples of confining gauge theories and 2d sigma models\,
I will explain how to assign to any massive QFT a UV and IR finite AdS par
tition function. I will then discuss the proposal that this quantity is mo
notonic under boundary RG flows that connect different AdS-invariant bound
ary conditions for the same bulk QFT.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/28/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Giovanni Galati (Free University of Brussels)
DTSTART:20260210T150000Z
DTEND:20260210T160000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/29
DESCRIPTION:Title: Confining Strings in a Gapless Environment\nby Giovanni Galati (
Free University of Brussels) as part of Quantum Theories of Fields\, Matte
r\, and Strings\n\n\nAbstract\nIn this talk\, I will discuss confined stri
ngs in a gapless four-dimensional theory\, focusing on finite-tension stri
ng solutions of the CP1 non-linear sigma model. I will analyze quantum flu
ctuations around these configurations\, derive the corresponding spectrum\
, and study its properties. I will then show how one can use these results
to compute various observables like the quantum corrections to the ground
-state energy and the effective string width. Through the discussion\, I w
ill compare these findings with the usual predictions of effective string
theory.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/29/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ivano Basile (Max Planck Institute for Physics)
DTSTART:20260216T140000Z
DTEND:20260216T150000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/30
DESCRIPTION:Title: Non-supersymmetric Branes and Discrete Topological Terms\nby Iva
no Basile (Max Planck Institute for Physics) as part of Quantum Theories o
f Fields\, Matter\, and Strings\n\n\nAbstract\nIn a recent work\, Tachikaw
a and Zhang proved the existence of a discrete topological term in the uni
que non-supersymmetric heterotic string with no tachyons in ten dimensions
. This theory features NS5-branes\, whose chiral degrees of freedom are no
t well-understood due to the absence of dualities or supersymmetry. In thi
s paper\, we test the consistency of a tentative spectrum obtained by anom
aly inflow\, studying the relation between the worldvolume theory and the
discrete topological term in spacetime. Furthermore\, we conduct a bottom-
up investigation of lower-dimensional gravitational theories with the same
methods.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/30/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Daniel Grumiller (TU Wien)
DTSTART:20260227T150000Z
DTEND:20260227T160000Z
DTSTAMP:20260404T110957Z
UID:QTFMS/31
DESCRIPTION:Title: Dilaton Gravity in 2d as a Universal Toy Model\nby Daniel Grumil
ler (TU Wien) as part of Quantum Theories of Fields\, Matter\, and Strings
\n\n\nAbstract\nI give an introduction and overview of 2d dilaton gravity
to emphasize its fairly universal use as a toy model in physics. I highlig
ht three recent and rather diverse applications: 1. SYK-like model for fla
t space holography with Schwarzian-like boundary action\, 2. Carroll black
holes in Carroll dilaton gravity\, and 3. Critical collapse at the thresh
old of black hole formation.\n
LOCATION:https://stable.researchseminars.org/talk/QTFMS/31/
END:VEVENT
END:VCALENDAR