Seminars

 Title: Research Group:   -- ALL -- Condensed Matter and Statistical Physics Group Weekly Seminar Condensed Matter and Statistical Physics Group Weekly Seminar Farmanieh Seminar Room Condensed Matter Physics SeminarFarmanieh Seminar Room Condensed Matter Physics Seminar Farmanieh Seminar Room Condensed Matter Physics SeminarFarmanieh Seminar Room Foundational Physics (FP) Monthly Seminar Farmanieh Seminar Room HEPCo Group Weekly Seminar High Energy SeminarFarmanieh Seminar Room Physics ColloquiumFarmanieh Seminar Room Soft Matter, Biological and Statistical Physics Research Group Meeting Farmanieh Seminar Room Special SeminarFarmanieh Seminar RoomApplied Physics Research Lab. Weekly Seminar Farmanieh Seminar Room AApplied Physics Research Laboratory Seminar Farmanieh Seminar RoomAPRL Weekly Seminar Farmanieh Seminar RoomColloquiumFarmanieh Seminar RoomCondensed MatterCondensed Matter and Statistical Physics GroupCondensed Matter and Statistical Physics Group Special Seminar Farmanieh Seminar RoomCondensed Matter and Statistical Physics Group Weekly SeminarCondensed Matter and Statistical Physics Group Weekly SeminarFarmanieh Seminar RoomCondensed Matter and Statistical Physics Group Weekly Seminar Farmanieh Seminar RoomCondensed Matter and Statistical Physics Group Weekly SeminarFarmanieh Seminar RoomCondensed Matter and Statistical Physics Group Weekly Seminar Farmanieh Seminar RoomCondensed Matter Group Weekly SeminarFarmanieh Seminar RoomCondensed Matter Physics SeminarFarmanieh Seminar RoomCondensed Matter Physics Seminar Farmanieh Seminar Room Condensed Matter Physics SeminarFarmanieh Seminar RoomCondensed Matter Physics SeminarFarmanieh Seminar RoomCondensed Matter Physics SeminarFarmanieh Seminar RoomCondensed Matter Physics SeminarFarmanieh Seminar RoomCanceledCondensed matter physicsFarmanieh Seminar Roomcondensed Matter Seminar Farmanieh Seminar RoomCondensed Matter SeminarFarmanieh Seminar RoomCondensed MatterFarmanieh Seminar RoomCondensed MatterLarak Seminar RoomCondensed MatterNiavaran Seminar RoomCosmologyCosmologyFarmanieh Seminar RoomEarly Universe Cosmology GroupEarly Universe Cosmology Group SeminarFarmanieh Seminar RoomEarly Universe Cosmology GroupFarmanieh Seminar Room CANCELLEDEarly Universe Cosmology SeminarFarmanieh Seminar RoomEarly Universe Cosmology SeminarFarmanieh Seminar Room CanceledEarly Universe CosmologyFarmanieh Seminar RoomEarly University CosmologyFarmanieh Seminar RoomFoundatin Physics Group Weekly Seminar Farmanieh Seminar Room Foundation of PhysicsFoundation of Physics Group Monthly Seminar Farmanieh Seminar RoomFoundation of Physics Group Monthly SeminarFarmanieh Seminar RoomFoundation of Physics Group Monthly SeminarFarmanieh Seminar RoomFoundational Physics (FP) Monthly Seminar Farmanieh Seminar RoomFoundational Physics (FP) Monthly Seminar Farmanieh Seminar RoomFoundational Physics (FP) Monthly SeminarFarmanieh Seminar RoomFoundations of Physics GroupFoundations of Physics Group (Webinar)General SeminarFarmanieh, Classroom CGeneral SeminarFarmanieh Seminar RoomGeneral SeminarNiavaran Seminar RoomHEC SeminarFarmanieh Seminar RoomHEC SeminarFarmanieh Seminar Room HEC seminarFarmanieh Seminar RoomHEC SeminarFarmanieh Seminar RoomCanceledHEPCo Group Seminar(Notice the unusual time) Farmanieh Seminar RoomHEPCo Group Special Seminar Farmanieh Seminar RoomHEPCo Group Weekly SeminarHEPCo Group Weekly Seminar(Skype)HEPCo Group Weekly SeminarFarmanieh Seminar Room HEPCo Group Weekly Seminar Farmanieh Seminar RoomHEPCo Group Weekly SeminarFarmanieh Seminar RoomHEPCo Group Weekly Seminar Farmanieh Seminar Room HEPCo SeminarFarmanieh Seminar RoomHEPCo SeminarFarmanieh Seminar RoomHEPCo SeminarFarmanieh Seminar RoomHigh Energy SeminarFarmanieh Seminar RoomHigh Energy SeminarFarmanieh Seminar RoomHigh Energy SeminarFarmanieh Seminar RoomHigh Energy TheoryHigh Energy TheoryFarmanieh Seminar RoomInformal Colloquium Farmanieh Seminar RoomInformal ColloquiumFarmanieh Seminar RoomLecture Series in Condensed Matter and Statistical PhysicsFarmanieh Seminar RoomNext Early Universe Cosmology SeminarFarmanieh Seminar Roomparticles & PhenomenologyFarmanieh Seminar RoomParticles and AcceleratorParticles and PhenomenologyParticles and Phenomenology Seminar Farmanieh Seminar RoomParticles and Phenomenology SeminarCANCELEDFarmanieh Seminar RoomParticles and Phenomenology SeminarFarmanieh Seminar Room Particles and PhenomenologyFarmanieh Seminar RoomPhysics ColloquiumPhysics ColloquiumFarmanieh Conference HallPhysics ColloquiumFarmanieh Seminar RoomPhysics ColloquiumFarmanieh, Classroom CPhysics ColloquiumFarmanieh, Conference HallPhysics ColloquiumFarmanieh, Lecture Room CPhysics ColloquiumFarmanieh, Seminar RoomPhysics ColloquiumFarmanieh, Seminar Room CPhysics Colloquium Farmanieh Seminar RoomPhysics Colloquium Farmanieh Seminar Room C Physics ColloquiumFarmanieh Conference HallPhysics ColloquiumFarmanieh Seminar RoomPhysics ColloquiumFarmanieh Seminar Room CPhysics ColloquiumFarmanieh Seminar Room DPhysics Colloquium Farmanieh Seminar RoomPhysics Colloquium Farmanieh Seminar Room Physics ColloquiumFarmanieh Seminar Room Physics ColloquiumLarak Seminar RoomPhysics ColloquiumNiavaran Lecture Hall (number 1)Physics ColloquiumNiavaran Lecture Hall (number 2)Physics ColloquiumNiavaran Seminar RoomPhysics SeminarFarmanieh Seminar Room DPlasmaQuantum Gravity group meetingFarmanieh Seminar RoomQuantum Gravity Group Meeting Farmanieh Seminar Room Series of lectures onFarmanieh Seminar RoomSoft Matter, Biological and Statistical Physics Research Group MeetingFarmanieh Seminar RoomSpecial HEP SeminarFarmanieh Seminar Room, Class DSpecial SeminarFarmanieh, Lecture room A, Ground floorSpecial SeminarConference Hall, Farmanieh Building (1st floor)Special SeminarFarmanieh Seminar RoomSpecial SeminarFarmanieh Seminar RoomString Theory Group MeetingString Theory Group Meeting Farmanieh Seminar Room String Theory Group MeetingFarmanieh Seminar Room String Theory Group MeetingFarmanieh Seminar RoomString Theory Group MeetingFarmanieh Seminar Room Canceled From:   JanFebMarAprMayJunJulAugSepOctNovDec12345678910111213141516171819202122232425262728293031 1990199119921993199419951996199719981999200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023 To:   JanFebMarAprMayJunJulAugSepOctNovDec12345678910111213141516171819202122232425262728293031 1990199119921993199419951996199719981999200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023

Physics Colloquium Series

Physics Colloquium presents a venue for the latest developments in all branches of physics in a way accessible to non-expert physicists. The monthly Physics Colloquia take place on selected Wednesdays at 4:30 pm in the Conference Hall of the main Farmanieh building, with an announcement circulated in advance. Please forward your suggestions for potential Colloquium speakers to a.naji(at)ipm.ir. To subscribe to the Colloquium mailing list, please send an email with the subject line "subscribe me to physics colloquium" to physoffice(at)theory.ipm.ac.ir.

 Wed Jun 29, 2022 (1401/4/8) Jun 291401/4/8 18:00 Disease Ecology from Perspectives of Physics Show Abstract Abstract:Here I will review my recent works [1-14] on modeling interacting contagious dynamics, for example coupled SIR or SIS dynamics, in mean field approximations and also on different random generated or empirical complex networks. I show and discuss how our recent results have been improving our understanding and prediction of epidemic dynamics and disease ecology while raising new questions and challenges in physics of critical phenomena. Also I will briefly discuss SARS-COV-2 from the perspective of disease ecology and present my recent studies on "behavioral responses to the COVID-19 spread"; which focus on the analysis and modelling of empirical data including testing strategies, air traffic, urban mobility, inequality (socio-economic classes), news spread, etc. in Iran or USA or globally. Lecturer(s): Fakhteh Ghanbarnejad From : Sharif University of Technology Research Group: Physics Colloquium More Info. : Link Wed May 25, 2022 (1401/3/4) May 251401/3/4 18:00 How living matter self-organizes while breaking action-reaction symmetry Show Abstract Abstract:There are many ways to study life, and one that is particularly appealing to physicists is regarding it as self-organized active soft matter that is away from equilibrium just the right way. In this Colloquium, I will discuss this notion, and provide a number of examples of how we can begin to put together simple systems - from basic ingredients that we fully understand - that would exhibit the kind of active behaviour we find in living systems. In particular, I will discuss the general class of chemical activity both as the source of non-equilibrium drive and the underlying mechanism for self-organization. Cells and microorganisms produce and consume all sorts of chemicals, from nutrients to signalling molecules. The same happens at the nanoscale inside cells themselves, where enzymes catalyze the production and consumption of the chemicals needed for life. In this colloquium, I will discuss a generic mechanism by which such chemically-active particles, be it cells or enzymes or engineered synthetic colloids, can "sense" each other and ultimately self-organize in a multitude of ways. A peculiarity of these chemical-mediated interactions is that they break action-reaction symmetry: for example, one particle may be repelled from a second particle, which is in turn attracted to the first one, so that it ends up "chasing" it. Such chasing interactions allow for the formation of large clusters of particles that "swim" autonomously. Regarding enzymes, we find that they can spontaneously aggregate into clusters with precisely the right composition, so that the product of one enzyme is passed on, without lack or excess, to the next enzyme in the metabolic cascade. Finally, I will discuss how breaking the action-reaction symmetry can allow a system described by two scalar fields to exhibit spontaneous breaking of time translation, time-reversal, space translation, and polar symmetries. Lecturer(s): Ramin Golestanian From : Max Planck Institute for Dynamics and Self-Organization & Oxford University Research Group: Physics Colloquium More Info. : Link Wed Apr 06, 2022 (1401/1/17) Apr 061401/1/17 18:00 Uncovering Energetic Processes in the Interstellar/Intergalactic Medium with the Square Kilometre Array Show Abstract Abstract:Investigating the physics and energetic of the medium where galactic structures, on various scales, are formed is the most fundamental step to understand the formation and evolution of galaxies. Modern galaxy evolution models suggest gas accretion from the intergalactic medium (IGM) or from cosmic filaments as a mechanism to maintain star formation and active galactic nucleus (AGN). Through gas heating and/or gas removal, these models also propose supernova feedback and AGN feedback as mechanisms to quench massive star formation. Observational studies, however, have not reached to a conclusive result showing that feedback can, in some cases, trigger star formation, leaving the issue as an open challenge. It seems that some basic concepts about the formation of structures in the interstellar medium (ISM) and the IGM are missed: What are physical parameters/agents governing the structure formation on various scales? How does the ISM/IGM energy balance change over cosmic time? The advent of the square kilometre array (SKA) and its instrumental capabilities tracing the most energetic ISM components has opened a new window shedding light on the issue. The SKA's sensitive radio continuum observations will trace high-energy particles and magnetic fields not only in star forming regions and AGNs, but also in more quiescent regions in molecular clouds and diffuse IGM, enabling us to study the role of magnetic fields/cosmic rays in structure formation. Sensitive radio continuum observations on large scales may also bring constrains on the entity of dark matter mapped by the Hubble Space Telescope (HST) and Dark Energy Camera (DECam). Lecturer(s): Fatemeh Tabatabaei From : IPM, School of Astronomy Research Group: Physics Colloquium More Info. : Link Wed Mar 02, 2022 (1400/12/11) Mar 021400/12/11 18:00 Dance of Cause and Effect: Fluctuation Induced Reduction of Dissipation in Classical Fluids Show Abstract Abstract:About seventy years ago, G I Taylor noticed that the tails of two closely swimming spermatozoa, oscillate in a synchronized fashion as if both of them are controlled from one regulating center. The two sperms, on the other hand, has no mean of communication, but the viscous fluid in which they are swimming. To address the why question, behind the observation, he suggested the minimization of total dissipation in the viscous medium. Sixty years later, Taylors original idea was put to more detailed analytical investigations; non-intuitively, it failed to attribute the observed synchronization to the expected reduction of dissipation. We begin with a very different problem: (a) The motion of two passively trapped beads, which interact through hydrodynamic interactions, and face a driven flow. Both theoretically and experimentally we observe that they almost follow the very motion they would have, if they were to swim on their own in the opposite direction of the driven flow. Calling the phenomenon, the reverse dance, we successfully attribute it to the reduction of the total dissipation. We then (b) extend the minimalistic approach, to two sets of beads; each supposed to mimic the tail of one spermatozoon. Facing a driven flow, on top of their intrinsic oscillation, this is a minimalistic model to verify Taylors idea. The question is, does this simple model lead us to synchronization as well as reduction of fluids dissipation? And if so, can it explain why Taylors original model failed to correctly attribute synchronization with reduction of dissipation? Lecturer(s): Seyyed Nader Rasuli From : University of Guilan & School of Physics, IPM Research Group: Physics Colloquium More Info. : Link Wed Feb 02, 2022 (1400/11/13) Feb 021400/11/13 18:19 Einstein vs Einstein: The Great War Show Abstract Abstract:Within the span of seven months in the midst of the Great War, Albert Einstein published two seminal papers, on "Quantum Emission and Absorption" and "Field Equations of Gravitation", that laid the foundations of modern physics. Our century-long odyssey starts here, taking us through the rise of holography, fuzzballs, firewalls, quantum chaos, and gravitational wave astronomy. However, in the end, it will land us back within those fateful seven months, where Einstein's July 1916 "Strahlungs-Emission und -Absorption nach der Quantentheorie" may prove to be the ultimate undoing of his December 1915 "Die Feldgleichungen der Gravitation". I will lay down the theoretical and observational arguments on both sides of (the latest battle) in Einstein's Great War. Lecturer(s): Niayesh Afshordi From : Department of Physics and Astronomy, University of Waterloo Research Group: Physics Colloquium More Info. : Link Wed Jan 05, 2022 (1400/10/15) Jan 051400/10/15 18:00 On Progress in Scientific Theories Show Abstract Abstract:Thomas Kuhn's "theory of scientific revolutions" describes evolution in sciences from a socio-historic viewpoint, wherein paradigm shift happens as a result of a scientific revolution. According to this theory paradigm shifts are not oriented, there is no progress in scientific paradigms. In this seminar, I critically review Thomas Kuhn's theory and introduce the notion of "hyper-theory" instead of paradigm. We then discuss that not only there are meaningful ratings for scientific models, but there is also a notion of progress in theories and hyper-theories. I present and state "model of progression scientific theories" instead of Kuhn's theory. Lecturer(s): M. M. Sheikh-Jabbari From : IPM, School of Physics Research Group: Physics Colloquium More Info. : Video Link Wed Feb 05, 2020 (1398/11/16) Feb 051398/11/16 16:00 Fundamental Successes and Challenges of the Contemporary PhysicsAbstract Lecturer(s): Mehdi Golshani From : Sharif University of Technology & IPM Research Group: Physics ColloquiumFarmanieh Conference Hall Wed Dec 11, 2019 (1398/9/20) Dec 111398/9/20 16:00 Primordial Universe and Cosmic InflationAbstractNoteAudio File Lecturer(s): Hassan Firouzjahi From : IPM, School of Astronomy Research Group: Physics ColloquiumFarmanieh Conference Hall Wed Nov 20, 2019 (1398/8/29) Nov 201398/8/29 16:00 The Higgs Boson program at the LHC and future collidersAbstract Lecturer(s): Mojtaba Mohammadi Najafabadi From : IPM, School of Particles and Accelerators Research Group: Physics ColloquiumFarmanieh Conference Hall Wed Mar 06, 2019 (1397/12/15) Mar 061397/12/15 16:30 "Landau and Ginzburg" remove tensions between "Planck" and "Hubble and Lyman" Abstract Lecturer(s): Nima Khosravi From : Shahid Beheshti Univ. & IPM Research Group: Physics ColloquiumFarmanieh Seminar Room *** Please Search (Top of the page) to see more seminars. ***

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