Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity"

Dimensional Regularization of Topological Terms in Dilaton Gravity 膨胀引力中拓扑项的维度正则化

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021) Pub Date : 2022-05-07 DOI: 10.22323/1.406.0025

C. Corianò, Mario Creti, S. Lionetti, Matteo Maria Maglio, Riccardo Tommasi

引用次数: 0

Confining strings, axions and glueballs in the planar limit 在平面极限中约束弦、轴子和胶球

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021) Pub Date : 2022-05-07 DOI: 10.22323/1.406.0168

A. Athenodorou

{"title":"Confining strings, axions and glueballs in the planar limit","authors":"A. Athenodorou","doi":"10.22323/1.406.0168","DOIUrl":"https://doi.org/10.22323/1.406.0168","url":null,"abstract":"We present recent results on the spectrum of a conﬁning ﬂux-tube that is closed around a spatial torus as a function of its length as well as the spectrum of glueballs. The extraction of the spectra has been realized by simulating four dimensional 𝑆𝑈 ( 𝑁 ) gauge theories and performing measurements using lattice techniques. Regarding ﬂux-tubes, we have performed calculations for 𝑁 = 3 , 5 , 6 and for various values of spin, parity and longitudinal momentum. Long ﬂux-tubes can be thought of as inﬁnitesimally thin strings; hence their spectrum is expected to be described by an eﬀective string theory. Furthermore, the ﬂux-tube’s internal structure makes possible the existence of massive states in addition to string modes. Our calculations demonstrate that although most states exhibit a spectrum which can be approximated adequately by Nambu-Goto there is strong evidence for the existence of a massive axion on the world-sheet of the QCD ﬂux-tube as well as a bound state of two such axions. Regarding glueballs, we extracted spectra from 𝑁 = 2 to 𝑁 = 12 which enables us to extrapolate to 𝑁 = ∞ . Our main aim was to calculate the lightest glueball masses for all diﬀerent conﬁgurations of the quantum numbers of spin, parity and charge conjugation. This provides a major update on the spectrum of glueballs in the planar limit.","PeriodicalId":131792,"journal":{"name":"Proceedings of Corfu Summer Institute 2021 \"School and Workshops on Elementary Particle Physics and Gravity\" — PoS(CORFU2021)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133723335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Bubbles of nothing and AdS instabilities 虚无的泡沫和ad的不稳定性

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021) Pub Date : 2022-05-02 DOI: 10.22323/1.406.0170

Nicolò Petri

引用次数: 0

Numerical sign problem and the tempered Lefschetz thimble method 数值符号问题和回火Lefschetz顶针法

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021) Pub Date : 2022-05-02 DOI: 10.22323/1.406.0254

M. Fukuma, N. Matsumoto, Y. Namekawa

引用次数: 2

Twisted geometry for submanifolds of $mathbb{R}^n$ $mathbb{R}^n$的子流形的扭曲几何

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021) Pub Date : 2022-04-30 DOI: 10.22323/1.406.0305

G. Fiore, Thomas Weber

引用次数: 0

Unfolding, higher spins, metaplectic groups and resolution of classical singularities 展开，高自旋，变形群和经典奇点的分解

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021) Pub Date : 2022-04-30 DOI: 10.22323/1.406.0276

C. Iazeolla, P. Sundell

{"title":"Unfolding, higher spins, metaplectic groups and resolution of classical singularities","authors":"C. Iazeolla, P. Sundell","doi":"10.22323/1.406.0276","DOIUrl":"https://doi.org/10.22323/1.406.0276","url":null,"abstract":"We review and extend some recent results concerning the analysis of spacetime singularities in four-dimensional higher spin gravity, summarizing how the coupling of the gravitational ﬁeld to massless higher spins may provide resolution mechanisms. We elucidate such mechanisms at the level of curvature singularities and degenerate metrics in exact as well as linearized solutions to Vasiliev’s equations. As a preamble, we review the underlying higher-spin algebra and its metaplectic group extensions, after which we detail various gauge functions encoding the 𝐴𝑑𝑆 4 vacuum and the non-rotating Bañados–Gomberoﬀ–Martinez(BGM) metric, the four-dimensional lift of the spinless BTZ black hole, in diﬀerent coordinate patches related by transition functions. We then revisit how, within the unfolded formalism, it is natural extend the BGM black hole through its causal singularity. Finally, we compare the metric-like and unfolded descriptions of scalar ﬂuctuations over the (extended) BGM background, showing how the latter description maps singularities to well-deﬁned metaplectic group elements providing regular values for the Weyl zero-form master ﬁeld, which thus admits continuation over the full extended BGM spacetime.","PeriodicalId":131792,"journal":{"name":"Proceedings of Corfu Summer Institute 2021 \"School and Workshops on Elementary Particle Physics and Gravity\" — PoS(CORFU2021)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124768736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Chaos in Matrix Gauge Theories with Massive Deformations 具有大量变形的矩阵规范理论中的混沌

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021) Pub Date : 2022-04-21 DOI: 10.22323/1.406.0294

K. Bacskan, S. Kurkccuovglu, O. Oktay, C. Tacsci

引用次数: 0

Type IIB S-folds: flat deformations, holography and stability IIB型s型褶皱:平面变形、全息、稳定

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021) Pub Date : 2022-04-21 DOI: 10.22323/1.406.0163

A. Guarino, Colin Sterckx

{"title":"Type IIB S-folds: flat deformations, holography and stability","authors":"A. Guarino, Colin Sterckx","doi":"10.22323/1.406.0163","DOIUrl":"https://doi.org/10.22323/1.406.0163","url":null,"abstract":"We review recent progress in the study of S-folds in light of the gauge/gravity duality and the AdS swampland conjecture. S-folds correspond to non-geometric backgrounds of type IIB supergravity of the form AdS 4 × S 1 × M that involve a non-trivial SL ( 2 , Z ) (S-duality) monodromy for the type IIB ﬁelds when moving around the S 1 . We present four such solutions with M = S 5 that preserve N = 4 , 2 , 1 , 0 supersymmetries. Via the AdS/CFT correspondence, these solutions are conjectured to describe new strongly coupled three-dimensional CFT’s on a localised interface of SYM. We discuss the existence of ﬂat deformations in the gravity side dual to marginal deformations of the conjectured S-fold CFT’s. From a geometrical perspective, the ﬂat deformations induce a monodromy ℎ on M and replace S 1 × M by the so-called mapping torus 𝑇 (M) ℎ . Interestingly, the ﬂat deformations provide a controlled mechanism of supersymmetry breaking for N ≥ 2 S-folds. We present a class of such non-supersymmetric S-folds obtained by ﬂat-deforming the N = 4 S-fold and discuss their (non-)perturbative stability.","PeriodicalId":131792,"journal":{"name":"Proceedings of Corfu Summer Institute 2021 \"School and Workshops on Elementary Particle Physics and Gravity\" — PoS(CORFU2021)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126270400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Integrable models from non-commutative geometry, with applications to 3d dualities 非交换几何的可积模型，及其在三维对偶性中的应用

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021) Pub Date : 2022-04-19 DOI: 10.22323/1.406.0253

A. Sharapov, E. Skvortsov

引用次数: 9

Gauge Field Theory Vacuum and Cosmological Inflation 规范场论真空和宇宙暴胀

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021) Pub Date : 2022-04-19 DOI: 10.22323/1.406.0123

G. Savvidy

{"title":"Gauge Field Theory Vacuum and Cosmological Inflation","authors":"G. Savvidy","doi":"10.22323/1.406.0123","DOIUrl":"https://doi.org/10.22323/1.406.0123","url":null,"abstract":"The deep interrelation between elementary particle physics and cosmology manifests itself when one considers the contribution of quantum fluctuations of vacuum fields to the dark energy and the effective cosmological constant. The contribution of zero-point energy exceeds by many orders of magnitude the observational cosmological upper bound on the energy density of the universe. Therefore it seems natural to expect that vacuum fluctuations of the fundamental fields would influence the cosmological evolution in any way. Our aim in this review article is to describe a recent investigation of the influence of the Yang-Mills vacuum polarisation and of the chromomagnetic condensation on the evolution of Friedmann cosmology, on inflation and on primordial gravitational waves. We derive the quantum energy-momentum tensor and the corresponding quantum equation of state for gauge field theory using the effective Lagrangian approach. The energy-momentum tensor has a term proportional to the space-time metric and provides a finite non-diverging contribution to the effective cosmological constant. This allows to investigate the influence of the gauge field theory vacuum polarisation on the evolution of Friedmann cosmology, inflation and primordial gravitational waves. The Type I-IV solutions of the Friedmann equations induced by the gauge field theory vacuum polarisation provide an alternative inflationary mechanism and a possibility for late-time acceleration. The Type II solution of the Friedmann equations generates the initial exponential expansion of the universe of finite duration and the Type IV solution demonstrates late-time acceleration. The solutions fulfil the necessary conditions for the amplification of primordial gravitational waves.","PeriodicalId":131792,"journal":{"name":"Proceedings of Corfu Summer Institute 2021 \"School and Workshops on Elementary Particle Physics and Gravity\" — PoS(CORFU2021)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121137120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021)最新文献