BEGIN:VCALENDAR
VERSION:2.0
PRODID:researchseminars.org
CALSCALE:GREGORIAN
X-WR-CALNAME:researchseminars.org
BEGIN:VEVENT
SUMMARY:Tadashi Okazaki (KIAS)
DTSTART:20220124T003000Z
DTEND:20220124T013000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/1
DESCRIPTION:Title: Boundaries and corners in supersymmetric gauge theories\nby Tad
ashi Okazaki (KIAS) as part of Advances in Theoretical Physics 2022\n\n\nA
bstract\nI will discuss recent studies of boundary and corner configuratio
ns in supersymmetric gauge theories. They involve various dualities across
the dimensions of spacetime and potential applications to twisted hologra
phy from their brane constructions in the context of twisted M-theory.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Xin Wang (KIAS)
DTSTART:20220124T020000Z
DTEND:20220124T030000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/2
DESCRIPTION:Title: Wilson loops in 5d supersymmetric gauge theories\nby Xin Wang (
KIAS) as part of Advances in Theoretical Physics 2022\n\n\nAbstract\nIn th
e supersymmetric version of gauge theories in 5d\, the insertion of half-B
PS Wilson loop operators provides interesting physical observables. In thi
s talk\, I will review the recent progress in calculating the 5d Wilson lo
op expectation values in supersymmetric gauge theories.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Subhajit Mazumdar (Seoul National University)
DTSTART:20220124T100000Z
DTEND:20220124T110000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/3
DESCRIPTION:Title: Kite and Triangle diagrams through Symmetries of Feynman Integrals<
/a>\nby Subhajit Mazumdar (Seoul National University) as part of Advances
in Theoretical Physics 2022\n\n\nAbstract\nThe Symmetries of Feynman Integ
rals (SFI) is a method for evaluating Feynman Integrals which exposes a no
vel continuous group associated with the diagram which depends only on its
topology and acts on its parameters. Using this method we study the kite
diagram (a two-loop diagram with two external legs) and the most general t
riangle diagram (one-loop diagram with three external legs) with arbitrary
masses and space-time dimensions. Generically\, this method reduces a Fey
nman integral into a line integral over simpler diagrams. We identify the
locus/loci in parameter space where the integrals further reduce to a mere
linear combination of simpler diagrams. We generalize and revisit some kn
own results.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Akhil Sivakumar (ICTS)
DTSTART:20220124T113000Z
DTEND:20220124T123000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/4
DESCRIPTION:Title: Lecture: Schwinger-Keldysh formalism and open field theories\nb
y Akhil Sivakumar (ICTS) as part of Advances in Theoretical Physics 2022\n
\n\nAbstract\nSchwinger-Keldysh path integral is a technique to study evol
ution of mixed states. In this lecture\, I will introduce this formalism a
nd explain how it can be used to compute the effective action of a quantum
system interacting with a bath. Such a system will undergo non-unitary ev
olution and is an open quantum system. Using the toy model of a Brownian p
article\, I will show how the data contained in the SK description can be
mapped to the more familiar form of a Langevin equation.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mukund Rangamani (UC Davis)
DTSTART:20220125T003000Z
DTEND:20220125T013000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/5
DESCRIPTION:Title: Real-time gravitational replicas\nby Mukund Rangamani (UC Davis
) as part of Advances in Theoretical Physics 2022\n\n\nAbstract\nI will di
scuss real-time path integrals in gravitational theories. As applications
we will describe the general structure of replica wormhole saddles and exe
mplify them with some low dimensional examples. Time permitting\, I will a
lso mention\, some aspects of effective dynamics of open quantum systems
with long-term memory.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shota Komatsu (CERN)
DTSTART:20220125T020000Z
DTEND:20220125T030000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/6
DESCRIPTION:Title: Analyticity and Unitarity for Cosmological Correlators\nby Shot
a Komatsu (CERN) as part of Advances in Theoretical Physics 2022\n\n\nAbst
ract\nI will discuss the fundamentals of quantum field theory on a rigid d
e Sitter space. First\, I will show that the perturbative expansion of lat
e-time correlation functions to all orders can be equivalently generated b
y a non-unitary Lagrangian on a Euclidean AdS geometry. This finding simpl
ifies dramatically perturbative computations\, as well as allows us to est
ablish basic properties of these correlators\, which comprise a Euclidean
CFT. Second\, I use this to infer the analytic structure of the spectral d
ensity that captures the conformal partial wave expansion of a late-time f
our-point function\, to derive an OPE expansion\, and to constrain the ope
rator spectrum. Third\, I will prove that unitarity of the de Sitter theor
y manifests itself as the positivity of the spectral density. This stateme
nt does not rely on the use of Euclidean AdS Lagrangians and holds non-per
turbatively.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pavel Kovtun (University of Victoria)
DTSTART:20220125T100000Z
DTEND:20220125T110000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/7
DESCRIPTION:by Pavel Kovtun (University of Victoria) as part of Advances i
n Theoretical Physics 2022\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Matti Jarvinen (APCTP)
DTSTART:20220125T113000Z
DTEND:20220125T123000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/8
DESCRIPTION:Title: Strong coupling models for dense and hot QCD\nby Matti Jarvinen
(APCTP) as part of Advances in Theoretical Physics 2022\n\n\nAbstract\nGa
uge/gravity duality can be useful to model QCD at intermediate temperature
s and densities\, where first-principles results are not available. This r
egion is relevant for core-collapse supernovae and binary neutron star mer
gers. I present a new framework for the QCD equation of state which combin
es the holographic V-QCD model with traditional nuclear theory models\, an
d covers all relevant temperatures and densities. I use V-QCD to describe
both nuclear and quark matter at high densities\, with temperature depende
nce estimated by employing a simple van der Waals hadron gas model. At low
densities\, I use DD2 Hempel-Schaffner-Bielich model\, i.e.\, a statistic
al model for nuclear matter with relativistic mean field interactions. The
resulting "hybrid" model gives predictions\, among other things\, for the
mixed quark-hadron phase and the location of the critical endpoint of the
quark-hadron transition. I will also discuss preliminary results from neu
tron star merger simulations which use this model.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kanghoon Lee (APCTP)
DTSTART:20220126T100000Z
DTEND:20220126T110000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/9
DESCRIPTION:Title: Quantum Perturbiner Method\nby Kanghoon Lee (APCTP) as part of
Advances in Theoretical Physics 2022\n\n\nAbstract\nWe construct the off-s
hell recursion relation for arbitrary loop-level scattering amplitudes bey
ond the tree-level Berends-Giele recursion relation for any quantum field
theory. We define the quantum perturbiner expansion from the quantum effec
tive action formalism\, including the perturbative quantum corrections. In
stead of the classical EoM in the conventional perturbiner method\, we exp
loit the Dyson-Schwinger equation to derive the recursion relation for arb
itrary order of loop-level scattering amplitudes. Furthermore\, we extend
this technique to compute the loop-level correlation functions.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Miok Park (IBS-CTPU)
DTSTART:20220126T113000Z
DTEND:20220126T123000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/10
DESCRIPTION:Title: Identifying Riemannian singularities with regular non-Riemannian g
eometry\nby Miok Park (IBS-CTPU) as part of Advances in Theoretical Ph
ysics 2022\n\n\nAbstract\nAdmitting non-Riemannian geometries\, Double Fie
ld Theory extends the notion of spacetime beyond the Riemannian paradigm.
We identify a class of singular spacetimes known in General Relativity wit
h regular non-Riemannian geometries. The former divergences merely corresp
ond to coordinate singularities of the generalised metric for the latter.
Computed in string frame\, they feature an impenetrable non-Riemannian sph
ere outside of which geodesics are complete with no singular deviation. Ap
proaching the non-Riemannian points\, particles freeze and strings become
(anti-)chiral.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Paolo Glorioso (Stanford University)
DTSTART:20220127T003000Z
DTEND:20220127T013000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/11
DESCRIPTION:by Paolo Glorioso (Stanford University) as part of Advances in
Theoretical Physics 2022\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stephen Angus (APCTP)
DTSTART:20220127T020000Z
DTEND:20220127T030000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/12
DESCRIPTION:Title: Fractons\, geometrically\nby Stephen Angus (APCTP) as part of
Advances in Theoretical Physics 2022\n\n\nAbstract\nI will discuss how fra
cton physics can be studied systematically within the geometric framework
of Double Field Theory (DFT). Following an introductory review of fracton
s\, I will argue that their restricted mobility and large degeneracy of qu
antum states can be attributed to the generalized geodesics and infinite-d
imensional isometries present in non-Riemannian backgrounds of DFT. Furth
ermore\, we find that a doubled pure Yang-Mills or Maxwell theory reduces
to an ordinary one interacting with a strain tensor theory\, giving a unif
ying description of photons and phonons. I will show how this photon-phon
on theory\, when minimally coupled to a charged particle in a non-Riemanni
an background\, lifts the particle immobility to a saturation velocity and
gives a modified dispersion relation.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jesse Van Muiden (SISSA)
DTSTART:20220127T100000Z
DTEND:20220127T110000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/13
DESCRIPTION:Title: Janus Interfaces\, S-Folds\, and Conformal Manifolds\nby Jesse
Van Muiden (SISSA) as part of Advances in Theoretical Physics 2022\n\n\nA
bstract\nIn this talk I will present some recent holographic studies on Ja
nus interfaces in four-dimensional N=4 SYM\, and the CFTs living on these
interfaces. Interestingly\, these theories can be compactified on S^1\, wi
th an S-duality twist\, resulting in a new class of three-dimensional CFTs
\, known as S-folds. Finally\, I will discuss the conformal manifolds on w
hich these S-fold CFTs lie\, which preserve either three-dimensional N=1 o
r N=2 supersymmetry.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chris Couzens (Kyunghee University)
DTSTART:20220127T113000Z
DTEND:20220127T123000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/14
DESCRIPTION:Title: Defect black hole horizons and new SCFT twists\nby Chris Couze
ns (Kyunghee University) as part of Advances in Theoretical Physics 2022\n
\n\nAbstract\nIn this talk we will give a pedagogical review of new (super
symmetric) black hole horizons containing defects\, that have appeared rec
ently in the literature. These 2d horizons are topologically punctured two
-spheres\, with at least two punctures\, and are equipped with non-constan
t curvature metrics. They arise when considering the near-horizon limit of
extremal asymptotically AdS accelerating black holes. Interestingly\, des
pite the black hole solutions having singularities\, by uplifting the solu
tions to string theory the solution can be made singularity free in certai
n cases. By using AdS/CFT we have a complimentary dual field theory perspe
ctive. The near-horizon geometry corresponds to the fixed point of an RG-f
low across dimensions\, triggered by wrapping a parent theory on the 2d h
orizon. As we will show\, in order for the fixed point to preserve supersy
mmetry\, the introduction of new and novel twists of the theory is require
d. We will make some comments on performing a microstate computation of th
e entropy of the black hole.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Taiki Haga (University of Tokyo)
DTSTART:20220128T003000Z
DTEND:20220128T013000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/15
DESCRIPTION:by Taiki Haga (University of Tokyo) as part of Advances in The
oretical Physics 2022\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dario Rosa (PCS-IBS)
DTSTART:20220128T020000Z
DTEND:20220128T030000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/16
DESCRIPTION:by Dario Rosa (PCS-IBS) as part of Advances in Theoretical Phy
sics 2022\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Viktor Jahnke (GIST)
DTSTART:20220128T100000Z
DTEND:20220128T110000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/17
DESCRIPTION:Title: Holographic teleportation with conservation laws: diffusion on tra
versable wormholes\nby Viktor Jahnke (GIST) as part of Advances in The
oretical Physics 2022\n\n\nAbstract\nWe study the effects of conservation
laws on wormholes that are made traversable by a double trace deformation.
After coupling the two asymptotic boundaries of an eternal AdS-Schwarzsch
ild black hole with $U(1)$ conserved current operators\, we find that the
corresponding quantum matter stress-energy tensor violates the averaged nu
ll energy condition (ANEC) in the bulk\, rendering the wormhole traversabl
e. We discuss how the wormhole opening depends on the charge diffusion con
stant and how this affects the amount of information that can be sent thro
ugh the wormhole.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kaiwen Sun (KIAS)
DTSTART:20220128T113000Z
DTEND:20220128T123000Z
DTSTAMP:20260404T094543Z
UID:ATP2022/18
DESCRIPTION:Title: New dualities between 2d rational CFTs\nby Kaiwen Sun (KIAS)
as part of Advances in Theoretical Physics 2022\n\n\nAbstract\nI discuss s
ome interesting new developments on 2d rational CFTs\, which are basic too
ls for both string theory and condensed matter theory. For the last a few
years\, holomorphic modular bootstrap has become a powerful approach to cl
assify 2d rational CFTs with given number of characters. A large number of
new CFTs have been revealed. Benefited from the recent results on the cla
ssification\, a new pattern of duality emerges for pairs of two CFTs with
sumation of their central charge as 24. The characters of the dual CFTs sa
tisfy certain universal bilinear relations. We systemically study such dua
lity among 2d rational CFTs with less than six characters. This is based o
n a recent work with Zhihao Duan and Kimyeong Lee.\n
LOCATION:https://stable.researchseminars.org/talk/ATP2022/18/
END:VEVENT
END:VCALENDAR