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DTSTART;TZID=America/New_York:20230424T110000
DTEND;TZID=America/New_York:20230424T120000
DTSTAMP:20260426T045755
CREATED:20230730T191102Z
LAST-MODIFIED:20240215T101445Z
UID:10001162-1682334000-1682337600@cmsa.fas.harvard.edu
SUMMARY:The Tameness of Quantum Field Theories 
DESCRIPTION:Swampland Seminar \nSpeaker: Thomas Grimm (Utrecht U.)\n\nTitle: The Tameness of Quantum Field Theories \nAbstract: Tameness is a generalized notion of finiteness that is restricting the geometric complexity of sets and functions. The underlying mathematical foundation lies in tame geometry\, which is built from o-minimal structures introduced in mathematical logic. In this talk I formalize the connection between quantum field theories and logical structures and argue that the tameness of a quantum field theory relies on its UV definition. I quantify our expectations on the tameness of effective theories that can be coupled to quantum gravity and on CFTs. In particular\, I present tameness conjectures about CFT observables and propose universal constraints that render spaces of CFTs to be tame sets. I then highlight the relation of these conjectures to other swampland conjectures\, e.g.\, by arguing that the tameness of CFT observables restricts having parametrical gaps in the operator spectrum.
URL:https://cmsa.fas.harvard.edu/event/swampland_42423/
LOCATION:Jefferson 368
CATEGORIES:Swampland Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/NTM-11.15.2023.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230410T110000
DTEND;TZID=America/New_York:20230410T120000
DTSTAMP:20260426T045755
CREATED:20230730T190732Z
LAST-MODIFIED:20240215T101627Z
UID:10001161-1681124400-1681128000@cmsa.fas.harvard.edu
SUMMARY:Swampland bounds on the abelian gauge sectors
DESCRIPTION:Swampland Seminar \nSpeaker: Seung-Joo Lee (IBS Daejeon)\n\nTitle: Swampland bounds on the abelian gauge sectors \nAbstract: In this talk we will derive various bounds on the 0-form and the 1-form abelian gauge sectors of gravitational effective theories in 6 dimensions with minimal supersymmetry. We will start by considering 6-dimensional F-theory vacua with at least one tensor multiplets\, to bound for them the number of the (0-form) U(1) gauge factors as well as the cyclic orders of the 1-form discrete gauge factors. While the two abelian gauge sectors may look rather independent\, we will observe that both are heavily constrained by the solitonic heterotic strings present in the spectrum\, which provide a common intuition for the derived bounds. Building upon the heterotic intuition\, we will also try extending the arena to address analogous bounds for all F-theory vacua in 6 dimensions and even beyond. If time permits\, several applications and future directions of research will be discussed at the end of the talk.
URL:https://cmsa.fas.harvard.edu/event/swampland_41023/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Swampland-Seminar-04.10.23.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230327T110000
DTEND;TZID=America/New_York:20230327T120000
DTSTAMP:20260426T045755
CREATED:20230730T190429Z
LAST-MODIFIED:20240215T101847Z
UID:10001160-1679914800-1679918400@cmsa.fas.harvard.edu
SUMMARY:Recent developments on the tidal Love numbers of black holes
DESCRIPTION:Swampland Seminar \nSpeaker: Valerio De Luca (UPenn)\n\nTitle: Recent developments on the tidal Love numbers of black holes \nAbstract: Tidal Love numbers describe the deformability of compact objects under the presence of external tidal perturbations\, and are found to be exactly zero for black holes in pure General Relativity. This property is however fragile\, since they receive corrections from higher-order derivative terms in the theory. We show that the tidal deformability of neutral black holes is constrained by the Weak Gravity Conjecture.
URL:https://cmsa.fas.harvard.edu/event/swampland_32723/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Swampland-Seminar-03.27.23.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230313T110000
DTEND;TZID=America/New_York:20230313T120000
DTSTAMP:20260426T045755
CREATED:20230730T190045Z
LAST-MODIFIED:20240215T102017Z
UID:10001159-1678705200-1678708800@cmsa.fas.harvard.edu
SUMMARY:String theory scalar potentials and their critical points
DESCRIPTION:Swampland Seminar \n\nSpeaker: David Andriot (Annecy\, LAPTH) \nTitle: String theory scalar potentials and their critical points \nAbstract: Positive scalar potentials in string effective theories could provide an origin to Dark Energy\, responsible for the accelerated expansion of our universe today or during inflation. It is thus crucial to characterize these scalar potentials\, namely their slope\, their critical points (de Sitter solutions) and the associated stability\, as also advocated by the Swampland Program. We will present such characterizations. Going further\, we will also discuss negative scalar potentials\, and make related observations on anti-de Sitter solutions\, in particular on a new mass bound\, as well as comments on scale separation.
URL:https://cmsa.fas.harvard.edu/event/swampland_31323/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Swampland-Seminar-0.13.23.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230213T110000
DTEND;TZID=America/New_York:20230213T120000
DTSTAMP:20260426T045755
CREATED:20230730T185547Z
LAST-MODIFIED:20240228T111605Z
UID:10001158-1676286000-1676289600@cmsa.fas.harvard.edu
SUMMARY:Parity and Cobordism
DESCRIPTION:Swampland Seminar \nSpeaker: Jake McNamara (Caltech)\n\nTitle: Parity and Cobordism\n\nAbstract: The swampland cobordism conjecture provides a convenient way to discuss conserved charges associated with the topology of spacetime. However\, much of the power of the cobordism conjecture comes from a mathematical black box: the Adams spectral sequence. In this talk\, I will give physical meaning to this black box through a concrete example: domain walls arising from the spontaneously breaking of parity symmetry\, which arise in particle physics in Nelson-Barr models. I will argue that parity domain walls are exactly stable\, and interpret this stability as the result of an unusual type of gauge symmetry that can only occur in gravitational theories.\n 
URL:https://cmsa.fas.harvard.edu/event/swampland_21323-2/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Topological-Seminar-11.15.23.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230130T110000
DTEND;TZID=America/New_York:20230130T120000
DTSTAMP:20260426T045755
CREATED:20230730T185242Z
LAST-MODIFIED:20240110T051011Z
UID:10001157-1675076400-1675080000@cmsa.fas.harvard.edu
SUMMARY:Swampland program\, extra dimensions and supersymmetry breaking
DESCRIPTION:Swampland Seminar \nSpeaker: Ignatios Antoniadis (LPTHE Paris)\n\nTitle: Swampland program\, extra dimensions and supersymmetry breaking\n\nAbstract: I will argue on the possibility that the smallness of some physical parameters signal a universe corresponding to a large distance corner in the string landscape of vacua. Such parameters can be the scales of dark energy and supersymmetry breaking\, leading to a generalisation of the dark dimension proposal. I will discuss the theoretical framework and some of its main physical implications to particle physics and cosmology.
URL:https://cmsa.fas.harvard.edu/event/swampland_13023/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Swampland-Seminar-01.30.23.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221205T110000
DTEND;TZID=America/New_York:20221205T120000
DTSTAMP:20260426T045755
CREATED:20230730T184816Z
LAST-MODIFIED:20240110T050720Z
UID:10001156-1670238000-1670241600@cmsa.fas.harvard.edu
SUMMARY:IIB Explored - Dualities\, Bordisms\, and the Swampland
DESCRIPTION:Swampland Seminar \nLocation: Jefferson Physical Laboratory\, Seminar room J356 \nSpeaker: Markus Dierigl (LMU Munich) \nTitle: IIB Explored – Dualities\, Bordisms\, and the Swampland \nAbstract: In this talk I will discuss the application of the Cobordism Conjecture to type IIB supergravity with non-trivial duality bundle. Calculating the relevant bordism groups we find that they are highly non-trivial and would predict the presence of various global symmetries in the underlying theory. Since quantum gravity theories do not allow for global symmetries\, we discuss which defects need to be included to break them completely. Interestingly\, we find many backgrounds that are well-known in the F-theory literature\, such as [p\,q]-7-branes\, non-Higgsable clusters\, as well as S-folds and their generalizations to higher codimensions. Further including worldsheet reflections\, predicts the existence of a new non-supersymmetric 7-brane with interesting properties and applications\, which I will discuss in more detail.
URL:https://cmsa.fas.harvard.edu/event/swampland_12522/
LOCATION:Jefferson 356
CATEGORIES:Swampland Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Topological-Seminar-11.09.23.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221115T110000
DTEND;TZID=America/New_York:20221115T120000
DTSTAMP:20260426T045755
CREATED:20230730T184327Z
LAST-MODIFIED:20240228T111805Z
UID:10001155-1668510000-1668513600@cmsa.fas.harvard.edu
SUMMARY:The Emergence Proposal in Quantum Gravity and the Species Scale
DESCRIPTION:Swampland Seminar \nSpeaker: Alvaro Herraez (Saclay) \nTitle: The Emergence Proposal in Quantum Gravity and the Species Scale \nAbstract: The Emergence Proposal claims that in Quantum Gravity the kinetic terms of the fields in the IR emerge from integrating out (infinite) towers of particles up to the QG cutoff. After introducing this proposal in the context of the Swampland Program\, I will explain why it is natural to identify this QG cutoff with the Species Scale\, motivating it by direct computation in the presence of the relevant towers. Then\, I will present evidence for this proposal by directly studying how it is realized in different string theory setups\, where the kinetic terms of scalars\, p-forms and even scalar potentials can be shown to emerge after integrating out such towers. \n  \n 
URL:https://cmsa.fas.harvard.edu/event/swampland_111522/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Swampland-Seminar-11.15.22.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221107T110000
DTEND;TZID=America/New_York:20221107T120000
DTSTAMP:20260426T045755
CREATED:20230730T183933Z
LAST-MODIFIED:20240228T112123Z
UID:10001154-1667818800-1667822400@cmsa.fas.harvard.edu
SUMMARY:EFT strings and emergence
DESCRIPTION:Swampland Seminar \nSpeaker: Fernando Marchesano (IFT Madrid) \nTitle: EFT strings and emergence \nAbstract: We revisit the Emergence Proposal in 4d N=2 vector multiplet sectors that arise from  type II string Calabi-Yau compactifications\, with emphasis on the role of axionic fundamental strings\, or EFT strings. We focus on large-volume type IIA compactifications\, where EFT strings arise from NS5-branes wrapping internal four-cycles\, and consider a set of infinite-distance moduli-space limits that can be classified in terms of a scaling weight w=1\,2\,3. It has been shown before how one-loop threshold effects of an infinite tower of BPS particles made up of D2/D0-branes generate the asymptotic behaviour of  the gauge kinetic functions along limits with $w=3$. We extend this result to w=2 limits\, by taking into account D2-brane multi-wrapping numbers. In w=1 limits the leading tower involves EFT string oscillations\, and one can reproduce the behaviour of both weakly and strongly-coupled U(1)’s independently on whether the EFT string is critical or not\, by assuming that charged modes dominate the light spectrum.
URL:https://cmsa.fas.harvard.edu/event/swampland_102422-2/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221024T110000
DTEND;TZID=America/New_York:20221024T120000
DTSTAMP:20260426T045755
CREATED:20230730T183559Z
LAST-MODIFIED:20240110T045511Z
UID:10001153-1666609200-1666612800@cmsa.fas.harvard.edu
SUMMARY:Anomalies of Discrete Gauge Symmetries and their Cancellation in 6D F-theory
DESCRIPTION:Swampland Seminar \nSpeaker: Paul-Konstantin Oehlmann(Northeastern) \nTitle: Anomalies of Discrete Gauge Symmetries and their Cancellation in 6D F-theory \nAbstract: We consider 6D SUGRAs with a discrete gauge group G\, engineered via F-theory compactifications on genus-one fibered threefolds. We argue that group G suffers from Dai-Freed anomalies that can be canceled via a discrete Green-Schwarz mechanism. We comment on the ambiguity to assign this GS term in the 7D Anomaly theory which leads to choices that are not all compatible with F-theory. \nIn F-theory we then deduce this Anomaly coefficient explicitly by computing the elliptic genera of the non-critical strings that couple to the 6D two-form fields: Their 2D worldsheet theories inherits a G Flavor symmetries whose t’Hooft anomaly cancels the 6D Dai-Freed anomaly in the bulk via inflow. This talk is based on work in preparation together with Markus Dierigl and Thorsten Schimmanek.
URL:https://cmsa.fas.harvard.edu/event/swampland_102422/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221011T110000
DTEND;TZID=America/New_York:20221011T120000
DTSTAMP:20260426T045755
CREATED:20230730T183036Z
LAST-MODIFIED:20240215T091450Z
UID:10001152-1665486000-1665489600@cmsa.fas.harvard.edu
SUMMARY:The Penrose Inequality as a Constraint on Low Energy Quantum Gravity
DESCRIPTION:Swampland Seminar\n\nSpeaker: Aasmund Folkestad (MIT)\n\n\nTitle: The Penrose Inequality as a Constraint on Low Energy Quantum Gravity\n\nAbstract: In this talk\, I argue that the Penrose inequality (PI) can be used to constrain low energy theories compatible AdS/CFT\, and possibly also quantum gravity in flat space. Focusing on AdS/CFT\, it is shown that the PI can be violated for minimally coupled scalar fields\, and I produce exclusion plots on couplings that respect the PI. I also present numerical evidence that top-down scalar theories and supersymmetric theories respect the PI. Finally\, similar to the Breitenlohner-Freedman bound\, I give a necessary condition for the stability AdS that constrains coupling constants (beyond the scalar mass).
URL:https://cmsa.fas.harvard.edu/event/swampland_101122/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20220919T110000
DTEND;TZID=America/New_York:20220919T120000
DTSTAMP:20260426T045755
CREATED:20230730T182302Z
LAST-MODIFIED:20240229T103619Z
UID:10001151-1663585200-1663588800@cmsa.fas.harvard.edu
SUMMARY:The story of the information paradox
DESCRIPTION:Swampland Seminar\n\nSpeaker: Samir Mathur (Ohio State)\n\nTitle: The story of the information paradox\n\nAbstract:  In 1975 Hawking argued that black hole evaporation would lead to a loss of unitarity in quantum theory.  The small corrections theorem made Hawking’s argument into a precise statement: if semiclassical physics hold to leading order in any gently curved region of spacetime\, then there can be no resolution to the paradox. In string theory\, whenever people have been able to construct microstates explicutly\, the states turned out to be horizon sized objects (fuzzballs) with no horizon; such a structure of microstates resolves the information paradox since their is no pair creation at a vacuum horizon. There have been a set of parallel attempts to resolve the paradox (with ideas involving wormholes\, islands etc) where the horizon is smooth in some leading approximation. An analysis of such models however indicated that in each case the exact quantum gravity theory would either have to be nonunitary or to have dynamics at infinity that is conflict with usual low energy physics in the lab.
URL:https://cmsa.fas.harvard.edu/event/title-tba-4/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
END:VEVENT
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