BEGIN:VCALENDAR PRODID;X-RICAL-TZSOURCE=TZINFO:-//com.denhaven2/NONSGML ri_cal gem//EN CALSCALE:GREGORIAN VERSION:2.0 BEGIN:VTIMEZONE TZID;X-RICAL-TZSOURCE=TZINFO:America/Los_Angeles BEGIN:STANDARD DTSTART:20251102T020000 RDATE:20251102T020000 RDATE:20261101T020000 TZOFFSETFROM:-0700 TZOFFSETTO:-0800 TZNAME:PST END:STANDARD BEGIN:DAYLIGHT DTSTART:20260308T020000 RDATE:20260308T020000 RDATE:20270314T020000 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260522T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260104T000000 CATEGORIES:Follow-on DESCRIPTION:\n KITP invites researchers who participated in Fall 2024 and Spring 2025 programs to apply to visit again\, in order to pursue ideas sparked at KITP. The goal is to support collaborative efforts that migh t be brought to fruition through a brief\, focused return. Visits must b e for one complete business week (Sunday - Friday)\, with all group memb ers in residence for the entire period.\n Groups of 2-6 members wishing to develop projects arising from the following programs may apply to vis it for 1 full business week between January 4 and May 22\, 2026:\n Acti ve Solids: From Metamaterials to Biological Tissue (ACTIVESOLIDS24) Phys ical Principles Shaping Biomolecular Condensates (BIOMOL25) Planet Forma tion and Migration near the Inner Edge of Disks (EDGEPLANETS25) Cosmic O rigins: The First Billion Years (FIRSTBILLION24)Generalized Symmetries i n Quantum Field Theory: High Energy Physics\, Condensed Matter\, and Qua ntum Gravity (GENSYM25) Horizontal Gene Transfer and Mobile Elements in Microbial Ecology and Evolution (HGT24) Many-body Quantum Optics (MBQOPT ICS24) Tunable Two-Dimensional Materials: Moiré and Beyond (MOIRE24) Wha t is Particle Theory? (PARTICLES25) The Physics of Changing Polar Climat e (POLAR25) Quantum Optics of Correlated Electron Systems (QOELECTRONS25 ) Interactions and Co-evolution between Viruses and Immune Systems (VIRA LIMMUNE24)\n A proposal consists of 1-2 pages explaining(1) the scientif ic motivation for the collaboration andsummary of your work to dateon it \, (2) each group member's role\, and (3) what you hope to achieve durin g your week at KITP.\n Applying consists of two steps:\n 1. One collabor atormust serve as KITP's primary point of contact and\n submit the group 's proposal.\n 2. Each member of the proposed group must also fill out a brief online application by by clicking "apply" on this page'sright-han d toolbar.\n The submission deadline is November 14\, 2025.\n For those invited to participate\, KITP will directly pay for campus housing and p rovide office space in Kohn Hall. KITP does not provide family housing f or Follow-ons. Visitors will be fully responsible for travel\, meals\, a nd any other expenses.\n *Note: Monday\, January 19 and Monday\, Februar y 16 are staffholidays\, so members of groups visiting those weeks will not be able to check in to their Kohn Hall offices until the correspondi ngTuesday. URL:https://www.kitp.ucsb.edu/activities/followon26a SUMMARY:Follow-on Program: January - May\, 2026 ORGANIZER: LOCATION:KITP BEGIN:VALARM TRIGGER:+P4320000D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260507T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260309T000000 CATEGORIES:Program ATTENDEE:Jasmine Brewer ATTENDEE:Aleksi Kurkela ATTENDEE:Ian Moult ATTENDEE:Wilke van der Schee ATTENDEE:Björn Schenke ATTENDEE:and Alba Soto Ontoso DESCRIPTION:Quantum Chromodynamics dictates that in extreme conditions of high temperature and high density\, hadronic matter forms a new form of elementary matter: quark-gluon matter. Quark-gluon matter encompasses t he hot strongly-coupled liquid known as Quark-Gluon Plasma (QGP) that fi lled the early universe and is produced in heavy-ion collisions. To the surprise of the broader particle physics community\, quark-gluon matter signatures have been measured in high-multiplicity proton-proton and pro ton-lead collisions\, opening up experimental inroads to study not only the properties of quark-gluon matter but also the dynamical non-equilibr ium processes that lead to its formation. This program will critically a ssess the theoretical description of the properties and dynamics of quar k-gluon matter\, and identify the future challenges of the field in the next decade. In particular\, we aim to bring new theoretical insights th at will deepen our understanding of existing and upcoming experimental m easurements. Key to this goal will be a vibrant environment that will br ing together heavy-ion experts with researchers of three neighboring fie lds: high-energy particle physics\, nuclear structure and formal theory. The program will push the boundaries of the precision frontier with emp hasis on the role of out-of-equilibrium QCD\, nuclear structure\, global analyses\, and high-energy probes and the quantum frontier\, where form al theoretical developments related to conformal field theory\, holograp hy\, and confinement meet our understanding of quark-gluon matter. URL:https://www.kitp.ucsb.edu/activities/quarkgluon26 SUMMARY:Frontiers of Quark-Gluon Matter ORGANIZER:Jasmine Brewer, Aleksi Kurkela, Ian Moult, Wilke van der Schee, Björn Schenke, and Alba Soto Ontoso LOCATION:KITP BEGIN:VALARM TRIGGER:+P36284400D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260716T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260511T000000 CATEGORIES:Program ATTENDEE:Aparna Baskaran ATTENDEE:Valentina Ros ATTENDEE:Grégory Schehr ATTENDEE:Julien Tailleur ATTENDEE:and Francesco Zamponi DESCRIPTION:Recent years have witnessed significant advances in non-equil ibrium statistical mechanics\, which has led to rapid progress in a vari ety of fields ranging from soft and active matter to molecular biophysic s\, ecology\, and genetics. Notably\, developments in large deviation th eory\, stochastic processes\, high-dimensional dynamics\, and optimizati on promise to push these advancements even further when integrated with insights tailored to the specific questions within each field.The object ive of this program is to apply these powerful concepts to evolutionary dynamics\, population dynamics\, and active matter\, and to explore the cross-fertilization between these areas. Some of the questions we aim to discuss during the program include: How can evolutionary dynamics benef it from paradigms developed within active matter to incorporate physical space and environmental heterogeneity? Conversely\, how can active matt er leverage the language of networks and high-dimensional dynamics\, wel l-developed in evolutionary dynamics\, to capture the hierarchical organ ization that leads to emergent phenomena of interest? Furthermore\, how might recent advances in large deviation theory and optimization in hig h-dimensional spaces be integrated into this interdisciplinary study?By addressing these questions\, the program aims to foster a deeper underst anding and uncover new insights into the complex behaviors and dynamics across these fields. URL:https://www.kitp.ucsb.edu/activities/complexsys26 SUMMARY:New Trends in Non-equilibrium Dynamics ORGANIZER:Aparna Baskaran, Valentina Ros, Grégory Schehr, Julien Tailleur , and Francesco Zamponi LOCATION:KITP BEGIN:VALARM TRIGGER:+P35078400D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260618T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260518T000000 CATEGORIES:Program ATTENDEE:Daniel Amor ATTENDEE:Martina Dal Bello ATTENDEE:Akshit Goyal ATTENDEE:and Jacopo Grilli DESCRIPTION:From hot springs to subglacial lakes\, from mammals' guts to plant roots\, microbes colonize every corner of the planet forming intri cate communities harboring thousands of interacting species. “Omics” tec hnologies have been instrumental in advancing our knowledge of the taxon omic and metabolic diversity of microbial species in all these ecosystem s. Yet\, knowing which genomes are present in a given environment is not enough to understand how communities assemble and function.Genes are st rongly coupled with organisms and the community that harbors them. Envir onmental conditions affect gene expression and the realized community me tabolisms\, which in turn modify the environment. This feedback shapes i nterspecies interactions and community states. Physiology is key to deco ding the gene-organism-environment triad\, but our knowledge is limited to a few species in controlled laboratory conditions. However\, getting a quantitative understanding of the physiology of all the microbial spec ies present in a community is an impossible task. As such\, to get a qua ntitative understanding of microbial assembly and function across enviro nments\, we need a framework to identify relevant coarse-grained physiol ogical traits from (meta)genomes. To this end\, a cross-disciplinary app roach is required.The program will assemble a diverse team of experts sp anning the fields of environmental microbiology\, microbial physiology\, ecology\, and physics to advance three core research areas: 1) understa nding to which degree physiological strategies can be inferred from geno mes\, 2) define which traits are relevant for microbial community assemb ly and under which environmental conditions\, and 3) develop a framework to integrate physiological traits into theories of microbial community assembly. URL:https://www.kitp.ucsb.edu/activities/microeco26 SUMMARY:Coarse-graining Microbial Ecology: from Genes to Physiological St rategies to Communities across Environments ORGANIZER:Daniel Amor, Martina Dal Bello, Akshit Goyal, and Jacopo Grilli LOCATION:KITP BEGIN:VALARM TRIGGER:+P37497600D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260716T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260622T000000 CATEGORIES:Program ATTENDEE:Karen Alim ATTENDEE:Naama Brenner ATTENDEE:Arvind Murugan ATTENDEE:and Jen Schwarz DESCRIPTION:Our brains are remarkable examples of learning systems. But l earning is a potentially broader metaphor\, applicable to physical and b iological phenomena that may not involve neurons at all. This program pu ts forward the nontrivial hypothesis that learning can be a useful frame work to organize questions about a broad range of systems that acquire f unctional behaviors by accumulating incremental changes due to environme ntal stimuli over their history. These examples range from reconfigurati on of vasculature networks in slime mold and changed behaviors in ciliat es and other single celled organisms in response to structured environme ntal stimuli\, to the generation of broadly neutralizing antibodies in t he adaptive immune system. Minimal systems that have provided insight in to possible mechanisms for such `physical learning’ include mechanical a nd molecular systems that learn to deploy specific elastic\, phase separ ation or self-assembly behaviors. In these and other examples\, systems adapt locally but confer global function.Despite the recent proliferatio n of examples\, the unifying key principles of such adaptive processes h ave not yet been distilled. In parallel\, the theory of learning is unde rgoing an accelerated development propelled by machine learning. This pr ogram will bring together physicists\, biologists and neuroscientists to refine key questions–what kinds\, or classes\, of natural local process es in different physical and biological systems allow them to learn? Wha t kinds of statistical structure in environmental stimuli can be learned by a given physical system? What physical properties and architectures allow for learning more complex internal models of complex environments (expressivity)? URL:https://www.kitp.ucsb.edu/activities/brainless26 SUMMARY:Biological Learning without a Brain ORGANIZER:Karen Alim, Naama Brenner, Arvind Murugan, and Jen Schwarz LOCATION:KITP BEGIN:VALARM TRIGGER:+P36892800D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260820T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260720T000000 CATEGORIES:Program ATTENDEE:Dominique Bergmann ATTENDEE:Fridtjof Brauns ATTENDEE:and Stefano Di Talia DESCRIPTION:How do living organisms reliably build complex structures fro m single cells\, despite the variability of their components and environ ments? What determines the emergence of organized patterns\, the timing of developmental transitions\, or the reproducibility of shape across in dividuals and species? While genetics has revealed many of the molecular players involved\, the fundamental principles that govern the transform ation from cell to tissue to organism remain elusive. Developmental syst ems exhibit remarkable coordination across scales&mdash\;from gene expre ssion to mechanical forces to tissue geometry&mdash\;but how these level s interact to produce robust morphogenesis is still not well understood. This program will bring together experimentalists and theoreticians to work towards uncovering unifying rules of development and building bridg es between distinct biological systems. Central topics include how geome try and mechanical feedback influence growth and differentiation\; how c ell identities emerge from high-dimensional gene expression landscapes\; and how large-scale coordination is achieved in development\, regenerat ion\, and repair. By comparing independently evolved systems across the animal and plant kingdoms\, this program seeks to uncover shared strateg ies in developmental biology and foster interdisciplinary collaboration. The program will be complemented by the QBio Summer Research Course for graduate students and postdocs\, training the next generation of scient ists in cutting-edge tools and concepts in quantitative developmental bi ology. URL:https://www.kitp.ucsb.edu/activities/morpho26 SUMMARY:Geometry and Intercellular Interactions in Morphogenesis of Anima ls and Plants ORGANIZER:Dominique Bergmann, Fridtjof Brauns, and Stefano Di Talia LOCATION:KITP BEGIN:VALARM TRIGGER:+P26784000D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20261008T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260727T000000 CATEGORIES:Program ATTENDEE:Eliska Greplova ATTENDEE:Hsin-Yuan (Robert) Huang ATTENDEE:Di Luo ATTENDEE:and Xiao-Liang Qi DESCRIPTION:Simulating quantum many-body systems represents one of the ce ntral challenges in theoretical physics due to the exponential growth of computational complexity in high-dimensional Hilbert spaces. While sign ificant progress has been made using specialized frameworks for specific regimes\, we still lack a comprehensive approach that effectively conne cts these various methods and synergizes experimental data with computat ional results. Recent breakthroughs in artificial intelligence\, particu larly in machine learning and large language models\, offer promising ne w pathways for representing quantum states\, analyzing complex data\, an d automating aspects of both experimental and theoretical research.This program aims to explore the intersection of AI and quantum matter across three key areas: machine learning simulations of quantum many-body grou nd states and dynamics\; AI-assisted quantum control and automation\; an d machine learning methods for analyzing quantum data. By bringing toget her quantum physicists\, computer scientists\, and experimentalists\, we intend to advance neural network-based wavefunction representations\, d evelop frameworks for sharing pre-trained quantum automation models\, es tablish cross-platform experimental databases\, create AI research assis tants for specialized tasks\, and design quantum learning algorithms wit h theoretical guarantees. Through these collaborative efforts\, we seek to forge new connections between AI and quantum physics that can drive t ransformative progress in understanding quantum matter. URL:https://www.kitp.ucsb.edu/activities/aiqmatter26 SUMMARY:AI for Quantum Matter ORGANIZER:Eliska Greplova, Hsin-Yuan (Robert) Huang, Di Luo, and Xiao-Lia ng Qi LOCATION:KITP BEGIN:VALARM TRIGGER:+P26784000D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20261022T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260824T000000 CATEGORIES:Program ATTENDEE:Immanuel Bloch ATTENDEE:Dan Mao ATTENDEE:Titus Neupert ATTENDEE:Pedram Roushan ATTENDEE:and Ady Stern DESCRIPTION:Fractionalization&mdash\;the emergence of low-energy excitati ons carrying fractional quantum numbers of the underlying particles&mdas h\;stands at the frontier of modern condensed matter physics. First stud ied in the context of spin-charge separation in Luttinger liquids and fr actionally charged excitations in fractional quantum Hall systems\, thes e ideas have evolved into the more general notion of topological order w ith important implications for quantum computing. Recent experimental br eakthroughs have expanded the landscape where fractionalization can be o bserved and manipulated which span both traditional condensed matter pla tforms and engineered quantum simulators. These diverse systems have rev ealed rich phenomena including anyonic quasiparticles and quantum Hall p hases in the absence of a magnetic field.These rapid experimental advanc es call for enhancing the theoretical framework to understand fractional ization in these new contexts\, including ideas like generalized symmetr ies and routes to preparing various fractionalized states. The program w ill bring together the community of quantum materials and quantum simula tions and gather expertise in analytical modeling\, numerical simulation \, and experimental techniques. By merging insights from different commu nities\, this program seeks to develop a comprehensive framework to simu late\, control\, and understand fractionalized excitations across divers e systems. URL:https://www.kitp.ucsb.edu/activities/frac26 SUMMARY:Engineering Fractionalization in Quantum Many-Body Systems: From New Quantum Materials to Quantum Simulators ORGANIZER:Immanuel Bloch, Dan Mao, Titus Neupert, Pedram Roushan, and Ady Stern LOCATION:KITP BEGIN:VALARM TRIGGER:+P26784000D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20261218T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20260913T000000 CATEGORIES:Follow-on DESCRIPTION:\n KITP invites researchers who participated in its calendar year2025 programs to apply to visit again\, in order to pursue ideas spa rked at KITP. The goal is to support collaborative efforts that might be brought to fruition through a brief\, focused return. Visits must be fo r one complete business week (Sunday - Friday)\, with all group members in residence for the entire period.\n Groups of 2-6 members wishing to d evelop projects arising from 2025 programs may apply to visit for 1 full business week between September 13 and December 18\, 2026.A proposal co nsists of 1-2 pages explaining(1) the scientific motivation for the coll aboration andsummary of your work to dateon it\, (2) each group member's role\, and (3) what you hope to achieve during your week at KITP.\n App lying consists of two steps:\n 1. One collaboratormust serve as KITP's p rimary point of contact and\n submit the group's proposal.\n 2. Each mem ber of the proposed group must also fill out a brief online application by by clicking "apply" on this page'sright-hand toolbar.\n The submissio n deadline is April 15\, 2026.\n For those invited to participate\, KITP will directly pay for campus housing and provide office space in Kohn H all. KITP does not provide family housing for Follow-ons. Visitors will be fully responsible for travel\, meals\, and any other expenses.\n *Not e:Due to UCSB holidays\, Kohn Hall will be unstaffed November 11\, 26\, and 27. Visitors will still have access to all KITP facilities. URL:https://www.kitp.ucsb.edu/activities/followon26b SUMMARY:Follow-on Program: September - December 2026 ORGANIZER: LOCATION:KITP BEGIN:VALARM TRIGGER:+P12960000D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20261218T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20261026T000000 CATEGORIES:Program ATTENDEE:Francois Foucart ATTENDEE:Raffaella Margutti ATTENDEE:Philipp Moesta ATTENDEE:and Rebecca Surman DESCRIPTION:The detection of bright electromagnetic (EM) transients power ed by neutron star mergers\, supernovae\, and other extreme astrophysica l events associated with compact objects will play a major role in nucle ar astrophysics in the coming years. These events act as cosmic laborato ries allowing us to study the properties of high-density matter and the origin of heavy elements. Transients may even reveal particle physics b eyond the standard model in conditions that we cannot probe on Earth. Th e rapidly growing number and variety of observed EM transients now regul arly challenge our incomplete theoretical understanding of the transient sky. These limitations inhibit our ability to leverage transient obse rvations for high-energy and nuclear astrophysics. Despite significant i mprovements to the numerical accuracy and microphysics of numerical simu lations\, the impact of nuclear physics inputs\, approximate physical mo deling\, and the large range in spatial scales and timescales that need to be resolved remain major issues. This program will address these issu es with an interdisciplinary group of nuclear\, theoretical\, computatio nal physicists and astronomers as we prepare for a new era of EM discove ry and anticipated experiments on exotic nuclei. URL:https://www.kitp.ucsb.edu/activities/explode26 SUMMARY:Enigmatic Explosions: Observations\, Modelling\, and Microphysics of Extreme Transients ORGANIZER:Francois Foucart, Raffaella Margutti, Philipp Moesta, and Rebec ca Surman LOCATION:KITP BEGIN:VALARM TRIGGER:+P31622400D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20261203T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20261026T000000 CATEGORIES:Program ATTENDEE:Anastasia Borschevsky ATTENDEE:Tijs Karman ATTENDEE:Hossein Sadeghpour ATTENDEE:and Michal Tomza DESCRIPTION:Ultracold molecules is a broad and rapidly developing researc h field at the intersection of disciplines in physics\, including atomic and molecular physics\, quantum optics\, quantum many-body physics\, qu antum information and simulation\, precision spectroscopy\, physics beyo nd the standard model\, scattering theory\, and quantum chemistry. The r ich molecular internal structures combined with long-range intermolecula r interactions and full controllability of quantum states at ultralow te mperature are both blessings and challenges. To explore the potential of ultracold molecules\, physics at very different energy\, time\, and len gth scales spanning many orders of magnitude must be addressed. Because of the complex and multiscale nature of this research field\, interdisci plinary and collaborative approaches are necessary to produce truly uniq ue practical opportunities for quantum science and technology\, from fun damental physics and testing predictions of the Standard Model\, through quantum-controlled chemical reactions\, to quantum computing and quantu m simulation.This program will explore investigations and applications o f ultracold molecules in all their intricacy and diversity. URL:https://www.kitp.ucsb.edu/activities/ultracold26 SUMMARY:Ultracold Molecules for Fundamental Physics\, Controlled Chemistr y\, and Quantum Information ORGANIZER:Anastasia Borschevsky, Tijs Karman, Hossein Sadeghpour, and Mic hal Tomza LOCATION:KITP BEGIN:VALARM TRIGGER:+P31622400D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20270311T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20270104T000000 CATEGORIES:Program ATTENDEE:Greg Bryan ATTENDEE:Christoph Pfrommer ATTENDEE:Mateusz Ruszkowski ATTENDEE:and Ellen Zweibel DESCRIPTION:Cosmic rays (CRs)&mdash\;the most energetic particles in the Universe&mdash\;have recently emerged as an essential agent shaping dive rse astrophysical systems. Interactions between CRs and plasma exhibit p arallels across the interstellar (ISM)\, circumgalactic (CGM)\, and intr acluster (ICM) media. Advancing our understanding of these key but incom pletely understood processes\, particularly CR transport\, is essential for assessing the impact of CRs across these environments.This program w ill strengthen connections between distinct scientific communities study ing CRs across scales&mdash\;from the solar wind to galaxy clusters&mdas h\;with an emphasis on CR-plasma interactions. Although these communitie s are grounded in shared physical principles\, they have largely evolved in parallel. The program will promote dialogue between these groups to deepen understanding of CRs' role in shaping diverse astrophysical syste ms.The program will examine the following themes: CRs in turbulent plasm as: How do CR-driven instabilities\, wave damping\, and intermittent tur bulence regulate CR transport?CRs in the ISM: How do supernovae accelera te CRs\, and how do CRs shape ISM chemistry and star formation?CR feedba ck in galaxies and clusters: How do CRs from supernovae and black hole j ets drive galactic winds and shape the CGM and ICM? Astrophysical tests of CR transport: How can modeling of individual objects (supernovae\, st ar clusters\, radio filaments\, galaxies) constrain CR physics? Solar en ergetic particles: How do we model and constrain particle acceleration a nd solar wind-ISM interactions? Laboratory tests: How can laser plasma e xperiments inform CR propagation and acceleration models? URL:https://www.kitp.ucsb.edu/activities/cosmicrays27 SUMMARY:Cosmic Rays in Astrophysical Systems: From the Sun to Galaxies an d Beyond ORGANIZER:Greg Bryan, Christoph Pfrommer, Mateusz Ruszkowski, and Ellen Z weibel LOCATION:KITP BEGIN:VALARM TRIGGER:+P34646400D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20270225T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20270104T000000 CATEGORIES:Program ATTENDEE:Thomas Hartman ATTENDEE:Alexandre Homrich ATTENDEE:Ian Moult ATTENDEE:and Alexander Zhiboedov DESCRIPTION:Particle physics has entered a data rich era\, with unprecede nted data sets from both collider and cosmological experiments. Using th is data to answer the biggest open questions in particle physics will re quire new ways of thinking about quantum field theory (QFT) and connecti ng it with data. While there has been tremendous recent progress in form al aspects of QFT\, much of it has been quite disconnected from experime nt. The study of detector operators\, most notably energy flux correlato rs\, has proven to be a remarkable exception. These observables\, which arise as direct theoretical models of collider experiments\, have played a crucial role in contemporary developments in formal QFT and gravity. Recently it has become possible to directly measure these observables at colliders\, leading to record precision extractions of Standard Model p arameters\, and measurements of properties of the quark gluon plasma. En ergy flow operators therefore provide a rare example of a vibrant and ti mely connection between real world phenomenology\, and advances in forma l QFT. This program will advance and build bridges between three areas: energy correlators in the collider frontier\, formal aspects of detector operators\, and their use in gravity and cosmology. URL:https://www.kitp.ucsb.edu/activities/correlators27 SUMMARY:Energy Correlators and Detector Operators: From Colliders to the Cosmos ORGANIZER:Thomas Hartman, Alexandre Homrich, Ian Moult, and Alexander Zhi boedov LOCATION:KITP BEGIN:VALARM TRIGGER:+P39315600D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20270422T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20270301T000000 CATEGORIES:Program ATTENDEE:Iair Arcavi ATTENDEE:Jared Goldberg ATTENDEE:Ylva Götberg ATTENDEE:Andy Howell ATTENDEE:and Tomer Shenar DESCRIPTION:Understanding the evolution and deaths of massive stars is ce ntral to solving major open questions in astrophysics. Massive stars sha pe galaxies through ionizing radiation and chemical enrichment\, while t heir explosive ends inject energy and heavy elements into the interstell ar medium. Their remnants&mdash\;neutron stars and black holes&mdash\;ar e key sources of gravitational waves and high-energy phenomena. Yet\, cr ucial aspects of massive star evolution\, explosion mechanisms\, and rem nant formation remain elusive. We still lack a clear mapping between tra nsient phenomena and progenitor systems\, and a predictive framework for which stars produce which types of supernovae and which collapse direct ly to black holes. Recent advances have brought us to a pivotal moment. Time-domain surveys are capturing early-phase supernovae and revealing d ramatic late-stage behavior of progenitors. Gravitational-wave detection s are shedding light on compact object formation. Massive star surveys a re mapping the crucial role of binarity in massive star evolution and de ath. Upcoming facilities will open new discovery spaces in stellar evolu tion and explosion physics. During this program we hope to shed light on interconnected problems in the massive stars and supernovae by creating space for cross-disciplinary dialogue. URL:https://www.kitp.ucsb.edu/activities/massivestars27 SUMMARY:The Dynamic Lives and Deaths of Massive Stars ORGANIZER:Iair Arcavi, Jared Goldberg, Ylva Götberg, Andy Howell, and Tom er Shenar LOCATION:KITP BEGIN:VALARM TRIGGER:+P34041600D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20270520T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20270315T000000 CATEGORIES:Program ATTENDEE:Leon Balents ATTENDEE:Yi-Ting Hsu ATTENDEE:Joel Moore ATTENDEE:and Mengxing Ye DESCRIPTION:Topology and correlation-driven symmetry breaking have long s erved as powerful frameworks for classifying phases of matter in crystal s. These notions describe the microscopic behavior of quasiparticles and are manifested in macroscopic experimental observables. Recent advances in quantum geometry (QG) have sparked a renewed interest\, revealing ex citing connections between QG quantities&mdash\;such as Berry curvature and quantum metric&mdash\;and a range of electronic properties and exper imental signatures in symmetry-breaking and topological phases in correl ated systems. These insights have also underscored the interplay between QG and electronic correlations\, positioning QG as both a diagnostic to ol and a potential tuning mechanism for the realization of exotic correl ated phases. The diverse array of QG quantities defined in momentum-\, r eal-\, and generalized spaces further calls for a systematic and in-dept h investigation of their roles at the intersection of symmetry\, topolog y\, and correlation.This KITP program aims to explore:\nEstablishing mat hematical and theoretical frameworks for quantum geometric quantities at both single-electron and many-body levels.Bridging the theoretical and experimental frontiers in QG\, including identifying the experimental ob servables for generalized QG\, discovering QG-rich materials platforms\, and controlling QG via experimental knobsUnderstanding the role QG play s in correlated systems\, symmetry-broken and topological phases\, gaple ss systems\, and more\, in terms of a wide range of analytical and numer ical methods. URL:https://www.kitp.ucsb.edu/activities/qgeometry27 SUMMARY:Quantum Geometry Meets Correlation\, Symmetry Breaking\, and Topo logy ORGANIZER:Leon Balents, Yi-Ting Hsu, Joel Moore, and Mengxing Ye LOCATION:KITP BEGIN:VALARM TRIGGER:+P37062000D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT BEGIN:VEVENT DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20270617T235959 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20270426T000000 CATEGORIES:Program ATTENDEE:Daniel Baumann ATTENDEE:Song He ATTENDEE:Hugh Thomas ATTENDEE:and Jaroslav Trnka DESCRIPTION:The last few years have seen the emergence of a new way of th inking about scattering amplitudes of particles and strings based on com binatorial and geometric ideas. Starting from the kinematic associahedra and ``surfacehedra” in the simplest toy model of colored scalars\, to t heir stringy extensions based on curves on surfaces\, to amplitudes of p ions and gluons which have revealed new features of these real-world the ories. Similar combinatorial/geometric structures have also been discove red underpinning cosmological correlators for conformally coupled scalar s. These objects have revealed profound connections between fundamental physics and new areas of mathematics at the intersection of combinatoric s\, algebra and geometry. This program will bring together physicists\, cosmologists and mathematicians\, to consolidate and synthesize these ex citing\, diverse developments and more importantly\, to tackle big open questions and explore entirely new questions. URL:https://www.kitp.ucsb.edu/activities/combgeom27 SUMMARY:Combinatorics and Geometries for Particle Physics and Cosmology ORGANIZER:Daniel Baumann, Song He, Hugh Thomas, and Jaroslav Trnka LOCATION:KITP BEGIN:VALARM TRIGGER:+P37062000D DESCRIPTION:application/registration deadline! END:VALARM END:VEVENT END:VCALENDAR