سخنران: ب.تقوی، پژوهشکده ذرات و شتابگرها

29 مهر 1399
14:00 تا 15:00

Abstract:

In this talk, we will study a particular deformation of the Jackiw-Teitelboim gravity recently considered by Witten and others. We will compute the partition function of this model as well as its higher order correlators to all orders in genus expansion in the low temperature limit for small perturbations. In this limit, the results match with those obtained from the Airy limit of a Hermitian random matrix ensemble. Using this result, we will also study the free energy of the model. One observes that although the annealed free energy has pathological behaviors, under certain assumptions, the quenched free energy evaluated by replica trick exhibits the desired properties at low temperatures.


Date: Tuesday, 20 October - ۲۹ مهر

2 p.m. - 3 p.m.


Skyroom Link: https://www.skyroom.online/ch/schoolofphysics/hepco-group




Skype link for emergency

SkypeLink: https://join.skype.com/cm7iyEUWJVCf

سخنران: هادی مهراب پور، پژوهشگاه دانش های بنیدی

28 مهر 1399
11:00 تا 12:00

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

سخنران: علیرضا علمایی، دانشگاه جهرم و پژوهشگاه دانش های بنیادی

23 مهر 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/385

سخنران: دکتر علی صادقی

23 مهر 1399
11:00 تا 12:00

ژورنال کلاب آنلاین
Accelerating crystal structure prediction by machine-learning interatomic potentials with active learning

سخنران: آرمان شفیع لو
موسسه نجوم و علوم فضایی کره

23 مهر 1399
13:30 تا 15:00

این سمینار روز چهارشنبه 23مهر ماه ساعت 13:30 به صورت آنلاین برگزار می شود.

سخنران: ع. قیوم‌زاده، NTNU

23 مهر 1399
14:00 تا 15:00

Abstract:

We investigate the effect of high-frequency laser pulses on a 2D honeycomb lattice described by the extended Kane-Mele-Hubbard model at half-filling and in the strongly correlated regime, i.e., an antiferromagnetic spin-orbit Mott insulator. Based on a generalized Floquet formalism, we demonstrate that by changing the amplitude and frequency of laser pulses, one can tune the strengths and signs of the Heisenberg exchange and Dzyaloshinskii-Moriya spin interactions. Our results pave the way for ultrafast optical spin manipulation and quantum magnonics in recently discovered two-dimensional magnetic materials.


Date: Wednesday, October 14, 2020 / چهارشنبه، ۲۳ مهر 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: ری‌هانا پاتل , برکلی

23 مهر 1399
16:30 تا 18:30

Among the many approaches to combining logic and probability, an important one has been to assign probabilities to formulas of a classical logic, instantiated from some fixed domain, in a manner that respects logical structure. A natural additional condition is to require that the distribution satisfy the symmetry property known as exchangeability. In the first part of this talk I will trace some of the history and context of this line of investigation, viewing exchangeability from a logical perspective. In the second part I will report on the current status of a joint programme of Ackerman, Freer and myself on countable exchangeable structures, which continues this line of investigation.
Please send an email to r.zoghi@gmail.com to join this webinar.

سخنران: م.ح. وحیدینیا، دانشگاه تحصیلات تکمیلی علوم پایه زنجان و پژوهشکده فیزیک

22 مهر 1399
14:00 تا 15:00

Abstract:

It has been observed that for black holes in a certain family of Horndeski gravity theories Wald's entropy formula does not lead to the correct first law for black hole thermodynamics. For this family of Horndeski theories speeds of propagation of gravitons and photons are in general different and gravitons move on an effective metric different than the one seen by photons. We show that the temperature of the black hole should be modified from surface gravity over 2π to include the effects of this effective metric. The modified temperature, with the entropy unambiguously computed by the solution phase space method, yields the correct first law. Our results have far reaching implications for the Hawking radiation and species problem, going beyond the Horndeski theories.

https://arxiv.org/abs/2005.12985


Date: Tuesday, 13 October - ۲۲ مهر

2 p.m. - 3 p.m.


Skyroom Link: https://www.skyroom.online/ch/schoolofphysics/hepco-group




Skype link for emergency

SkypeLink: https://join.skype.com/cm7iyEUWJVCf

سخنران: Prof. Alejandro Ayala (UNAM, Mexico City, Mexico)

22 مهر 1399
19:30 تا 21:30

نرخ و شار بیضوی فوتون حاصل از جداشدن و ادغام القایی میدان مغناطیسی گلوئونها در برخورهای نسبیتی یونهای سنگین

سخنران: محمد تقی سعیدی - دانشجوی دکتری علوم اعصاب شناختی دانشگاه تبریز

21 مهر 1399
15:00 تا 17:00

وبینارهای علمی رایگان پژوهشگاه دانش های بنیادی

اطلاعات تکمیلی در http://scs.ipm.ac.ir/talk.jsp
چکیده:


این بحث به‌عنوان مقدمه‌ای بر انواع مختلف سوگیری‌هایی خواهد بود که بر سامانه‌های شناختی انسان تأثیر می‌گذارند. تاکید ‌بر این است‌که، این سوگیری‌ها چگونه پژوهشگران و تعاملات علم را تحت تأثیر قرار می‌دهند. پژوهشگران انسان هستند و سوگیری‌هایی که در اینجا مورد بحث قرار می‌گیرند همگانی هستند. سوگیری های شناختی بر همۀ انسان‌ها تأثیر می‌گذارند. هدف این بحث این است تا نشان دهد چگونه سوگیری‌های رایج شناختی، قضاوت‌ها، تصمیم‌گیری‌ها و تعاملات ایجادشده توسط پژوهشگران را متأثر می‌کنند.