سخنران: سعید قاسمی, آکادمی علوم چک

5 آذر 1399
15:30 تا 17:30

Some important C*-algebras have been recently flagged and studied as Fraisse limits. In the first part of my talk, I will review the Fraisse theory of C*-algebras (or more generally, of metric structures)--in the context of category theory (as opposed to model theory)--and give examples of approximately finite-dimensional non-commutative C*-algebras which appear as Fraisse limits and exabit Cantor-space-like universality/homogeneity properties. In the second part of my talk, I will show how one can apply the fact that a C*-algebra A is the Fraisse limit of a category of C*-algebras, which is sufficiently closed under taking tensor products of its objects and morphisms, to show that A is "self-absorbing" in a very "strong" sense (a C*-algebra is self-absorbing if it is isomorphic to its tensor product with itself). I will use this result to sketch a new and much easier proof for the notorious fact that the "Jiang-Su algebra" is strongly self-absorbing.
To join this webinar, please send an email to r.zoghi@gmail.com.

سخنران: مسعود شکری، پژوهشگاه دانش های بنیادی

5 آذر 1399
11:00 تا 12:00

Meeting's link: https://www.skyroom.online/ch/ipm-particles/school-of-particles-and-accelerators-weekly-meeting

Indico: https://indico.particles.ipm.ir/indico/event/390

سخنران: احسان ابراهیمی
دانشگاه صنعتی شریف

5 آذر 1399
13:30 تا 15:00

این سمینار روز چهارشنبه5 آذرماه ساعت 13:30 به صورت آنلاین برگزار می شود.

سخنران: س. ایزدی، پژوهشکده فیزیک

5 آذر 1399
14:00 تا 15:00

Abstract:

Thanks to magnetocrystalline anisotropy in van der Waals magnetic materials, the Mermin-Wagner restriction is deviated and two-dimensional (2D) magnetic materials had been discovered recently. The combination of magnetic and unique properties of 2D materials has been rapidly attracted the attention of researchers to novel magnetic 2D materials. So, the control of spin-spin interactions in magnetic systems is an essential topic related to the fundamental physics of quantum magnetism as well as applied spintronics-based technology. In this talk, the magnetic properties of monolayer CrI3, as a representative of 2D magnetic materials, are discussed. Density functional theory (DFT)-based calculations are used to extract a suitable spin model Hamiltonian that reproduces accurate and viable magnetic properties of monolayer CrI3. We present the mechanical strain and electric field dependence of various spin-spin interactions, consisting of symmetric isotropic exchange, magnetic anisotropy, and Dzyaloshinskii-Moriya (DM) interactions in the monolayer.


Date: Wednesday, November 25, 2020 / چهارشنبه، ۵ آذر ۱۳۹۹

Time: 14:00-15:00

To join the webinar, please follow this link:
https://www.skyroom.online/ch/schoolofphysics/condensed-matter-and-statistical-physics
and log in as guest.

Organized by: Condensed Matter and Statistical Physics Group, School of Physics (IPM)

Queries about this event should be addressed to Dr. A. Faridi at azadeh.faridi@ipm.ir

سخنران: Prof. Marcello Disconzi (Department of Mathematics, Vanderbilt University, USA)

5 آذر 1399
19:30 تا 21:30

سیالات لزج در نسبیت عام

سخنران: آرش اباذری، دانشگاه صنعتی شریف، پژوهشگاه دانش های بنیادی

3 آذر 1399
16:00 تا 18:00

بدن‌مندی خودآگاهی نزد فیشته

سخنران: سیما بشیری، پژوهشگاه دانش های بنیدی

3 آذر 1399
11:00 تا 12:00

https://www.skyroom.online/ch/ipm-particles/journal-club-ep

سخنران: کاظم بی تقصیر، دانشگاه صنعتی شاهرود

29 آبان 1399
11:00 تا 12:00

https://www.skyroom.online/ch/ipm-particles/theory-weekly-seminar

سخنران: راحله جعفری, دانشگاه خوارزمی

29 آبان 1399
11:00 تا 13:00

The almost Gorenstein property appeared in the work of Barucci and Fr�oberg in the context of 1-dimensional analytical unramified rings. It was extended to 1- dimensional local rings by Goto, Matsuoka and Thi Phuong, and later on to rings of higher dimension by Goto, Takahashi and Taniguchi. Let R be a positively graded Cohen-Macaulay K-algebra with canonical module ωR. We let a = − min{k ∈ Z : (ωR)k 6= 0}, which is also known as the a-invariant of R. R is called (graded) almost Gorenstein if there exists an exact sequence of graded R-modules 0 → R → ωR(−a) → E → 0, where E is an Ulrich module. Let H ⊂ N d be a normal affine semigroup, R = K[H] its semigroup ring over the field K and ωR its canonical module. The Ulrich elements for H are those h in H such that for the multiplication map by x h from R into ωR, the cokernel is an Ulrich module. In this talk, we provide some algebraic criterion for testing the Ulrich property. This is based on a joint work with J�urgen Herzog and Dumitru I. Stamate.
To join the meeting, go to the following link:
https://vmeeting.ipm.ir/b/mat-9px-g3c