BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Alexey Koshelev (UBI) DTSTART:20211206T140000Z DTEND:20211206T150000Z DTSTAMP:20260404T131154Z UID:FHD3/1 DESCRIPTION:Title: Resolving Black Holes singularities in Analytic infinite derivative th eories of gravity\nby Alexey Koshelev (UBI) as part of Frontiers of Ho lographic Duality-3\n\n\nAbstract\nIn my talk I will show that Analytic in finite derivative gravity in any dimension represents the most general gra vity action ever needed to extract propagator around maximally symmetric s pacetimes. Moving on\, I will show that such a theory is geodesically comp lete leading to the resolution of the Black Hole singularities. Thus singu lar blackholes (Schwarzschild as an example) can be understood as non-sin gular compact objects still with a horizon\, whose core is governed by the mass and the effective scale of the non-locality.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/1/ END:VEVENT BEGIN:VEVENT SUMMARY:Oleg Andreev (Munich University) DTSTART:20211207T140000Z DTEND:20211207T150000Z DTSTAMP:20260404T131154Z UID:FHD3/2 DESCRIPTION:Title: From strings to QCD: The study of doubly heavy hadrons\nby Oleg An dreev (Munich University) as part of Frontiers of Holographic Duality-3\n\ n\nAbstract\nWe will discuss the string theory constructions for the $QQq$ and $QQ\\bar q\\bar q $systems. Following the hadro-quarkonium picture th e potential is a function of separation between the heavy quarks. The res ults show the universality of the string tension and factorization at smal l separations expected from heavy quark-diquark symmetry. The potentials l ook very similar at small quark separations but at larger separations they differ. The reason for this is that the flattening of the potentials happ ens at two well-separated scales as follows from the two different mechani sms: string breaking by light quarks for QQq and string junction annihilat ion for $QQ\\bar q\\bar q$.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/2/ END:VEVENT BEGIN:VEVENT SUMMARY:Anastasia Golubtsova (JINR) DTSTART:20211207T150000Z DTEND:20211207T160000Z DTSTAMP:20260404T131154Z UID:FHD3/3 DESCRIPTION:by Anastasia Golubtsova (JINR) as part of Frontiers of Hologra phic Duality-3\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/FHD3/3/ END:VEVENT BEGIN:VEVENT SUMMARY:Matti Jarvinen (APCTP) DTSTART:20211208T130000Z DTEND:20211208T140000Z DTSTAMP:20260404T131154Z UID:FHD3/4 DESCRIPTION:Title: Generalized 3D instanton crystals\nby Matti Jarvinen (APCTP) as pa rt of Frontiers of Holographic Duality-3\n\n\nAbstract\nNuclear matter at large number of colors is necessarily in a solid phase. In particular holo graphic nuclear matter takes the form of a crystal of instantons of the fl avor group. I analyze the three-dimensional crystal structures and the ori entation patterns for the two-body potential motivated by holographic dual ity. I use simulations of large ensembles of instantons to identify the la ttice structure and orientations for various parameter values of the two-b ody potential. The resulting phase diagram is surprisingly complex\, inclu ding a variety of ferromagnetic and antiferromagnetic crystals with variou s global orientation patterns\, and various "non-Abelian" crystals where o rientations have no preferred direction. The simulation results are augmen ted by analytic analysis of the long-distance divergences\, and numerical computation of the (divergence free) energy differences between the non-Ab elian crystals\, which precisely determine the structure of the phase diag ram.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/4/ END:VEVENT BEGIN:VEVENT SUMMARY:Giuseppe Policastro (Ecole Normale) DTSTART:20211208T140000Z DTEND:20211208T150000Z DTSTAMP:20260404T131154Z UID:FHD3/5 DESCRIPTION:Title: A semi-holographic model of non-Fermi liquids\nby Giuseppe Policas tro (Ecole Normale) as part of Frontiers of Holographic Duality-3\n\n\nAbs tract\nIn recent years\, the holographic correspondence has been used in m any contexts\nto explore properties of strongly coupled systems that are h ard to explain\nby conventional methods. One instance of such systems is g iven by the high-T superconductors\,\nwhich exhibit non-Fermi liquid behav ior in the so-called "strange metal" phase above the critical temperature. \nI will discuss the holographic constructions of these systems\,\nand in particular a model that I and my collaborators are currently investigating \,\nbased on a semi-holographic approach. I will discuss the results for t he transport properties\, in particular\nI will show that under certain c onditions an emergent linear-in-T behavior\nof the longitudinal resistivit y appears over a significant range of temperatures.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Jonah Kudler-Flam (Chicago University) DTSTART:20211209T140000Z DTEND:20211209T150000Z DTSTAMP:20260404T131154Z UID:FHD3/6 DESCRIPTION:Title: Distinguishability in Random States\, Eigenstates\, and Gravity\nb y Jonah Kudler-Flam (Chicago University) as part of Frontiers of Holograph ic Duality-3\n\n\nAbstract\nRecently\, there has been significant progress in solving the black hole information problem from explicit calculations of the entropy of Hawking radiation\, confirming consistency of gravity wi th unitarity. One aspect of the information problem left unresolved by ent ropy calculations is the distinguishability of different black hole micros tates: why do different microstates appear to lead to the same final (ther mal) state? I will address this problem by studying the distinguishability of radiation coming from different black holes. In parallel\, I will pres ent a derivation of the subsystem eigenstate thermalization hypothesis for a class of chaotic many-body systems as well as generalizations to tensor network states.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Saso Grozdanov (University of Ljubljana) DTSTART:20211209T150000Z DTEND:20211209T160000Z DTSTAMP:20260404T131154Z UID:FHD3/7 DESCRIPTION:by Saso Grozdanov (University of Ljubljana) as part of Frontie rs of Holographic Duality-3\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/FHD3/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Larus Thorlacius (University of Iceland) DTSTART:20211210T140000Z DTEND:20211210T150000Z DTSTAMP:20260404T131154Z UID:FHD3/8 DESCRIPTION:Title: Moving black branes and Lifshitz hydrodynamics at generic z\nby La rus Thorlacius (University of Iceland) as part of Frontiers of Holographic Duality-3\n\n\nAbstract\nQuantum critical fluids with Lifshitz symmetry\, or Lifshitz fluids for short\, have interesting properties that set them aside from more conventional fluid systems. In particular\, a Lifshitz flu id with a generic dynamical critical exponent z > 1 does not have boost sy mmetry meaning that a moving fluid is physically distinct from a fluid at rest in a moving coordinate frame. We show how a relatively simple Einstei n-Maxwell-Dilaton model provides a concrete holographic realisation of Lif shitz fluids. In this setting\, a black brane at generic z carrying linear momentum along the boundary corresponds to a non-equilibrium steady state of the fluid. We obtain the stress tensor complex for the dual field theo ry via a suitably defined holographic renormalisation procedure and demons trate that the expected hydrodynamic relations for a Lifshitz perfect flui d are satisfied.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Michal Heller (Max Planck Institute for Gravitational Physics) DTSTART:20211213T150000Z DTEND:20211213T160000Z DTSTAMP:20260404T131154Z UID:FHD3/9 DESCRIPTION:Title: Towards deriving a gravity dual to complexity\nby Michal Heller (M ax Planck Institute for Gravitational Physics) as part of Frontiers of Hol ographic Duality-3\n\n\nAbstract\nWhat are boundary interpretations of hol ographic complexity proposals and what are gravity duals to complexity are important open questions. I will discuss two ongoing efforts to answer th em\, which are based on searching for a gravity dual of a circuit cost and \, through minimization of the latter object\, to a gravity dual of bona f ide complexity. Based on 2101.01185 and an ongoing work.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/9/ END:VEVENT BEGIN:VEVENT SUMMARY:Hong Liu (MIT) DTSTART:20211213T160000Z DTEND:20211213T170000Z DTSTAMP:20260404T131154Z UID:FHD3/10 DESCRIPTION:Title: Causal connectability between quantum systems and the black hole inte rior in holographic duality\nby Hong Liu (MIT) as part of Frontiers of Holographic Duality-3\n\n\nAbstract\nIn holographic duality an eternal Ad S black hole is described by two copies of the boundary CFT in the thermal field double state. This identification still has many puzzles\, includin g the boundary descriptions of the event horizons\, the interiors of the b lack hole\, and the singularities. Compounding these mysteries is the fac t that\, while there is no interaction between the CFTs\, observers from t hem can fall into the black hole and interact. We will address these issue s in this talk. In particular\, we (i) present a boundary formulation of i nfalling observers\; (ii) show that in any holographic systems\, a sharp e vent horizon can only emerge in the infinite N limit\; (iii) give an expli cit construction in the boundary theory of an evolution operator for a fam ily of bulk in-falling observers\, making manifest the boundary emergence of the black hole horizons\, the interiors\, and the associated causal str ucture. \n\nA by-product is a concept called causal connectability\, which is a criterion for any two quantum systems (which do not necessarily have a known gravity dual) to have an emergent sharp horizon structure.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/10/ END:VEVENT BEGIN:VEVENT SUMMARY:Hao Geng (Harvard U.) DTSTART:20211214T140000Z DTEND:20211214T150000Z DTSTAMP:20260404T131154Z UID:FHD3/11 DESCRIPTION:Title: Entanglement Islands in Braneworlds\nby Hao Geng (Harvard U.) as part of Frontiers of Holographic Duality-3\n\n\nAbstract\nEntanglement isl and is a recently emergent concept playing an important role in resolving the black hole information paradox. In these resolution proposals the bla ck hole is coupled to a bath which absorbs the radiation from the black ho le and we can calculate the entanglement entropy of the black hole radiati on as a function of time by studying the bath. The results are consistent with Page's argument that the entanglement entropy versus time diagram obe ys unitarity-- a Page curve. In higher dimensions\, this calculation of th e Page curve can be done only in braneworld models. More precisely\, the K arch-Randall braneworld models and for AdS black holes. A closer look at the braneworld models tells us that the graviton is massive as the massles s graviton mode is not normalizable. However\, this effect of having a mas sive graviton is induced by coupling the black hole to a bath which is a u niversal feature of all the resolution proposals in higher dimensions. Sev eral attempts to construct entanglement islands for massless gravity using braneworld give us many interesting new setups to study quantum gravity-- including a codimension two holography in AdS (wedge holography) and Page curve for de Sitter radiation. Though these attempts didn't provide us wi th entanglement islands for massless gravity in asymptotically AdS spaces. We will see that a more careful study tells us that in a large set of sit uations entanglement islands don't exist in massless gravity theories. In the talk I will give a complete review of this line of research.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/11/ END:VEVENT BEGIN:VEVENT SUMMARY:Gabor Sarosi (CERN) DTSTART:20211214T150000Z DTEND:20211214T160000Z DTSTAMP:20260404T131154Z UID:FHD3/12 DESCRIPTION:Title: The volume of the black hole interior at late times\nby Gabor Sar osi (CERN) as part of Frontiers of Holographic Duality-3\n\n\nAbstract\nTh e volume of the interior of a two-sided eternal black hole classically gro ws forever. I will show that in JT gravity\, summing the non-perturbative contribution of higher topologies leads to a saturation of the volume of t he interior at times exponential in the entropy of the black hole. I will explain that this is evidence for the conjecture that the size of the inte rior is related to the complexity of the holographically dual quantum stat e.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/12/ END:VEVENT BEGIN:VEVENT SUMMARY:Natalia Pinzani-Fokeeva (MIT) DTSTART:20211215T140000Z DTEND:20211215T150000Z DTSTAMP:20260404T131154Z UID:FHD3/13 DESCRIPTION:Title: Enstrophy and black hole supertranslations\nby Natalia Pinzani-Fo keeva (MIT) as part of Frontiers of Holographic Duality-3\n\n\nAbstract\nE nstrophy is an approximately conserved quantity in 2+1 dimensional fluid f lows that has dramatic consequences for the phenomenology of nonrelativist ic turbulence: it implies an inverse energy cascade. In this talk\, I will present an algorithm on how to construct an enstrophy current for generic fluid flows (relativistic and non). In addition\, I will show how a subse t of certain horizon symmetries of 3+1 dimensional AdS black holes also le ad to enstrophy conservation in the dual holographic fluid theory.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/13/ END:VEVENT BEGIN:VEVENT SUMMARY:Jorit Kruthoff (Stanford) DTSTART:20211215T170000Z DTEND:20211215T180000Z DTSTAMP:20260404T131154Z UID:FHD3/14 DESCRIPTION:Title: Gravity factorized\nby Jorit Kruthoff (Stanford) as part of Front iers of Holographic Duality-3\n\n\nAbstract\nIn this talk I will discuss m odels of two-dimensional gravity that resolve the factorization puzzle and have a discrete spectrum\, whilst retaining a semiclassical description. A novelty of these models is that they contain non-trivially correlated sp acetime branes or\, equivalently\, nonlocal interactions in their action. Demanding factorization fixes almost all brane correlators\, and the exact geometric expansion of the partition function collapses to only two terms : the black hole saddle and a subleading ``half-wormhole'' geometry\, whos e sum yields the desired discrete spectrum. Non-perturbatively\, the corre lated branes are a certain multitrace interaction and I will show how it r esults in a factorizing theory with discrete spectrum. I will end with a f ew comments on the relevance of wormholes\, the matrix model implementatio n and higher dimensions.\n LOCATION:https://stable.researchseminars.org/talk/FHD3/14/ END:VEVENT BEGIN:VEVENT SUMMARY:Pawel Caputa (Warsaw University) DTSTART:20211216T140000Z DTEND:20211216T150000Z DTSTAMP:20260404T131154Z UID:FHD3/15 DESCRIPTION:Title: Geometry of Krylov Complexity\nby Pawel Caputa (Warsaw University ) as part of Frontiers of Holographic Duality-3\n\n\nAbstract\nI will desc ribe geometric aspect of the operator growth\nand Krylov complexity from a new perspective of symmetries and\ncoherent states. As the main examples I will talk about operator\ngrowth and Krylov complexity in the SYK model and in 2d CFTs. Based\non arXiv: 2109.03824 [hep-th] and arXiv: 2110.10519 [hep-th].\n LOCATION:https://stable.researchseminars.org/talk/FHD3/15/ END:VEVENT BEGIN:VEVENT SUMMARY:Sergey Vernov (MSU) DTSTART:20211216T150000Z DTEND:20211216T160000Z DTSTAMP:20260404T131154Z UID:FHD3/16 DESCRIPTION:Title: Nonlocal gravity and F(R) models\nby Sergey Vernov (MSU) as part of Frontiers of Holographic Duality-3\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/FHD3/16/ END:VEVENT BEGIN:VEVENT SUMMARY:Niko Jokela (University of Helsinki) DTSTART:20211217T140000Z DTEND:20211217T150000Z DTSTAMP:20260404T131154Z UID:FHD3/17 DESCRIPTION:Title: NICER view on holographic QCD\nby Niko Jokela (University of Hels inki) as part of Frontiers of Holographic Duality-3\n\n\nAbstract\nHologra phic techniques are particularly fit to analyzing matter at extreme condit ions where QCD matter is strongly coupled. Combining predictions of the ho lographic model with state-of-the-art effective field theory models of nuc lear matter\, I construct a family of feasible "hybrid" equations of state which cover both the quark matter and nuclear matter phases. The model pr edicts\, among other things\, that the NICER's radius measurement is fully consistent with the absence of quark matter inside massive neutron stars. I also briefly overview some results that holography has achieved on gene ral level as well as discuss how I foresee holography contributing to comp act-star physics in the coming years\n LOCATION:https://stable.researchseminars.org/talk/FHD3/17/ END:VEVENT BEGIN:VEVENT SUMMARY:Kristina Rannu (PFUR) DTSTART:20211217T150000Z DTEND:20211217T160000Z DTSTAMP:20260404T131154Z UID:FHD3/18 DESCRIPTION:Title: Anisotropic solutions for a holographic light-quark model with an ext ernal magnetic field\nby Kristina Rannu (PFUR) as part of Frontiers of Holographic Duality-3\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/FHD3/18/ END:VEVENT END:VCALENDAR