سخنران: حمزه خانپور، دانشگاه علم و فناوری مازندران

2 خرداد 1401
11:00 تا 12:00

جستجو برای برهمکنش های ناهنجار کوارک تاپ و بوزون هیگز با واپاشی به دو کوارک باتوم
در انرژی مرکز جرم 13TeV

سخنران: لوکا چیانتینی, دانشگاه سینا، ایتالیا

3 خرداد 1401
16:30 تا 18:00

I will make an overview on the theory of secant varieties to projective varieties, starting with fundamental motivations and basic tools, and focusing on some recent developments of the theory. The general pattern shows that properties of secant varieties to X are intimately related with the geometry of its configurations of points, thus with the intrinsic geometry of the variety X. The recent awareness of strong connections between the theory of secant varieties and multilinear algebra suggests several lines of investigations which involve highly sophisticated geometric tools, and poses questions on projective loci that represent a challenge for the development of Algebraic Geometry.

https://zoom.us/join
Meeting ID: 9086116889
Passcode: 362880

Email: agnt@ipm.ir

سخنران: R. Golestanian, Max Planck Institute for Dynamics and Self-Organization & Oxford University

4 خرداد 1401
18:00 تا 19:00

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.

سخنران: رضا جعفری، پژوهشگاه دانش های بنیادی

4 خرداد 1401
11:00 تا 12:00

کاوش در جفت شدگی یوکاوای کوارک بی در واپاشی موثر هیگز در برخورد دهنده های الکترون-پروتون آینده