BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Alessandra Buonanno (MPIGP Potsdam) DTSTART:20201216T140000Z DTEND:20201216T151500Z DTSTAMP:20260404T100116Z UID:XmasIFT/1 DESCRIPTION:Title: Making High-Precision Gravitational Waves to Explore the Dark Unive rse\nby Alessandra Buonanno (MPIGP Potsdam) as part of XXVI IFT Christ mas Workshop\n\n\nAbstract\nThe solution of the two-body problem in Genera l Relativity has been crucial in observing gravitational waves from binary systems composed of black holes and neutron stars\, and inferring their a strophysical\, cosmological and gravitational properties. I will review th e theoretical groundwork that has enabled these observations\, and discuss recent theoretical advances aimed at predicting highly accurate waveform models for future detectors on the ground and in space. Finally\, I will h ighlight some interesting observational findings obtained recently by the LIGO and Virgo detectors.\n LOCATION:https://stable.researchseminars.org/talk/XmasIFT/1/ END:VEVENT BEGIN:VEVENT SUMMARY:George Efstathiou (Kavli Institute for Cosmology\, Cambridge) DTSTART:20201216T151500Z DTEND:20201216T163000Z DTSTAMP:20260404T100116Z UID:XmasIFT/2 DESCRIPTION:Title: The Hubble Tension\nby George Efstathiou (Kavli Institute for C osmology\, Cambridge) as part of XXVI IFT Christmas Workshop\n\n\nAbstract \nI will review the constraints on H_0 from the Planck CMB measurements an d compare the best fit Planck model with recent results from ACTpol. The C MB value of H_0 is secure\, yet is in tension with Cepheid based measureme nts of H_0. Although the CMB value is based on the Lambda CDM cosmology\ , there has been no compelling theoretical modification of the model that can explain the tension. I will therefore explore whether systematic erro rs may be affecting the Cepheid distance scale and if so\, what must these errors look like.\n LOCATION:https://stable.researchseminars.org/talk/XmasIFT/2/ END:VEVENT BEGIN:VEVENT SUMMARY:Manfred Lindner (Max Planck Institute for Nuclear Physics\, Heidel berg) DTSTART:20201216T164500Z DTEND:20201216T180000Z DTSTAMP:20260404T100116Z UID:XmasIFT/3 DESCRIPTION:Title: The XENON1T excess\, interpretations and implications\nby Manfr ed Lindner (Max Planck Institute for Nuclear Physics\, Heidelberg) as part of XXVI IFT Christmas Workshop\n\n\nAbstract\nThe XENON1T experiment aims at detecting signatures of dark matter. The latest analysis showed\, howe ver\, an unexpected excess of events with low recoil energy. The talk will cover in detail how the signal is obtained and different interpretations of this excess. The signal might point to new physics and several theoreti cal directions and their implications for future measurements and other ex periments will be discussed.\n LOCATION:https://stable.researchseminars.org/talk/XmasIFT/3/ END:VEVENT BEGIN:VEVENT SUMMARY:Thomas Schwetz-Mangold (Karlsruhe Institute of Technology) DTSTART:20201217T140000Z DTEND:20201217T151500Z DTSTAMP:20260404T100116Z UID:XmasIFT/4 DESCRIPTION:Title: The fate of hints: recent developments in neutrino physics\nby Thomas Schwetz-Mangold (Karlsruhe Institute of Technology) as part of XXVI IFT Christmas Workshop\n\n\nAbstract\nFinite neutrino mass points to new physics beyond the Standard Model. In this talk I give an overview over re cent results in neutrino physics\, including the results of a combined ana lysis of latest neutrino oscillation data. We comment on the implications of this years results for the type of neutrino mass ordering (normal versu s inverted) and on the status of leptonic CP violation within the minimal 3-flavour framework. I review the status of absolute neutrino mass searche s and searches for lepton-number violation. I will briefly discuss some ex amples for searches for more exotic physics in the neutrino sector\, inclu ding sterile neutrinos. The guidline of my talk will be various "hints" fo r standard as well as non-standard physics\, which have been around for so me time in neutrino data\, and their fate due to recent developements.\n LOCATION:https://stable.researchseminars.org/talk/XmasIFT/4/ END:VEVENT BEGIN:VEVENT SUMMARY:Jesse Thaler (MIT) DTSTART:20201217T151500Z DTEND:20201217T163000Z DTSTAMP:20260404T100116Z UID:XmasIFT/5 DESCRIPTION:Title: Collider Physics and Machine Learning\nby Jesse Thaler (MIT) as part of XXVI IFT Christmas Workshop\n\n\nAbstract\nModern machine learnin g has had an outsized impact on many scientific fields\, and particle phys ics is no exception. What is special about particle physics\, though\, is the vast amount of theoretical and experimental knowledge that we already have about many problems in the field. In this talk\, I draw on examples from collider phenomenology and quantum chromodynamics to highlight the f ascinating interplay between theoretical principles and machine learning s trategies.\n LOCATION:https://stable.researchseminars.org/talk/XmasIFT/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Netta Engelhardt (MIT) DTSTART:20201217T164500Z DTEND:20201217T180000Z DTSTAMP:20260404T100116Z UID:XmasIFT/6 DESCRIPTION:Title: The Information Paradox in the Age of Holographic Entanglement Entr opy\nby Netta Engelhardt (MIT) as part of XXVI IFT Christmas Workshop\ n\n\nAbstract\nThe black hole information paradox — whether information escapes an evaporating black hole or not — remains one of the greatest unsolved mysteries of theoretical physics. The apparent conflict between v alidity of semiclassical gravity at low energies and unitarity of quantum mechanics has long been expected to find its resolution in the deep quantu m gravity regime. Recent developments in the holographic dictionary and in particular its application to entanglement\, however\, have shown that a semiclassical analysis of gravitational physics has a hallmark feature of unitary evolution. I will describe this recent progress and discuss some p otential new avenues for working towards a resolution of the information p aradox.\n LOCATION:https://stable.researchseminars.org/talk/XmasIFT/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Zohreh Davoudi (U. Maryland) DTSTART:20201218T140000Z DTEND:20201218T151500Z DTSTAMP:20260404T100116Z UID:XmasIFT/7 DESCRIPTION:Title: Toward quantum simulation of systems of relevance to nuclear and pa rticle physics\nby Zohreh Davoudi (U. Maryland) as part of XXVI IFT Ch ristmas Workshop\n\n\nAbstract\nA vibrant program has formed in recent yea rs in various scientific disciplines to take advantage of near-term and fu ture quantum-simulation and quantum-computing hardware to study complex qu antum many-body systems\, building upon the vision of Richard Feynman for quantum simulation. Such activities have recently started in nuclear and p article physics\, hoping to bring new and powerful experimental and comput ational tools to eventually address a range of challenging problems in str ongly interacting quantum field theories and nuclear many-body systems. In this talk\, I first motivate the need for quantum simulation in nuclear p hysics by showcasing some of the state of the art in our classical simulat ions and discussing the existing challenges to move ahead. I will then rev iew a number of important developments in quantum simulation\, including p roposals for simulating strongly interacting field theories with the ultim ate goal of studying strong dynamics of quarks and gluons\, and of nucleon s. Some of the requirements for hardware technologies that are expected to enable both the analog simulations and the digital quantum computations o f these problems will be enumerated\, and an experiment-theory co-developm ent program will be motivated with an emphasis on trapped-ion platforms.\n LOCATION:https://stable.researchseminars.org/talk/XmasIFT/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Pol Forn-Diaz (IFAE - Barcelona Supercomputing Center) DTSTART:20201218T151500Z DTEND:20201218T163000Z DTSTAMP:20260404T100116Z UID:XmasIFT/8 DESCRIPTION:Title: A superconducting Qbit as a universal approximant\nby Pol Forn- Diaz (IFAE - Barcelona Supercomputing Center) as part of XXVI IFT Christma s Workshop\n\n\nAbstract\nA single qubit can approximate any bounded compl ex function as stored in the degrees of freedom defining the quantum state . This result is analogue to two known theorems ensuring approximations fo r functions\, namely Fourier series and the Universal Approximation Theore m (UAT)\, that holds for neural networks with a large enough single\, inte rmediate hidden layer. The single qubit circuit becomes more accurate as t he independent function variable is re-uploaded in an increasing number of gates\, analogous to the classical methods that grow in accuracy with an increased number of intermediate steps. We further implement a one-qubit a pproximant in a real superconducting qubit device consisting of a transmon qubit in a three-dimensional cavity\, explicitly showing how the ability to describe a set of functions improves with the depth of the quantum circ uit.\n LOCATION:https://stable.researchseminars.org/talk/XmasIFT/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Nima Arkani-Hamed (IAS) DTSTART:20201218T164500Z DTEND:20201218T180000Z DTSTAMP:20260404T100116Z UID:XmasIFT/9 DESCRIPTION:Title: Spacetime\, Quantum Mechanics and Positive Geometry at Infinity \nby Nima Arkani-Hamed (IAS) as part of XXVI IFT Christmas Workshop\n\nAbs tract: TBA\n LOCATION:https://stable.researchseminars.org/talk/XmasIFT/9/ END:VEVENT END:VCALENDAR