سخنران: Y. Farzan, School of Physics

26 شهریور 1404
14:00 تا 15:00

Date and time

Tuesday, September 16th, 2025 (Shahrivar 25th, 1404), 2:00 pm (Tehran zone)

https://physics.ipm.ir/seminars/2025/16sep25/poster.pdf


Link

https://www.skyroom.online/ch/schoolofphysics/highenergyseminar


Abstract
In the first part of the talk we shall very briefly discuss the pivotal role that four female astronomer, Henrietta Swan Leavitt, Vera Rubin, Jocelyn Bell Burnell, Andrea Ghez have played in advancement of astrophysics and cosmology. This year our emphasis will be on the great contribution of Leavitt to science so we shall briefly discuss Cepheids.
In the second half of the talk, we shall emphasize on the role that “identity as a female active physicist” can play to combat challenges in life, especially in these turbulant times.

Link: https://www.skyroom.online/ch/schoolofphysics/highenergyseminar

سخنران: دکتر سعیده افهامی - پژوهشکده ذرات و شتابگرها

18 شهریور 1404
11:00 تا 12:00

TiZrV ویژگی‌های خلأ پوشش‌های گیرانداز غیرتبخیری



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

سخنران: حامد پاکتچی, پژوهشگاه دانشهای بنیادی

17 شهریور 1404
10:30 تا 12:00


Venue: Niavaran, Khosrovshahi Lecture Hall

سخنران: حامد پاکتچی, پژوهشگاه دانشهای بنیادی

16 شهریور 1404
10:30 تا 12:00


Venue: Niavaran, Khosrovshahi Lecture Hall

سخنران: زهرا شمالی

13 شهریور 1404
14:00 تا 15:00

چکیده:


Investigation of heat transport in micro/nanoscale semiconductor structures owing to their application especially in transistor technology, is a matter of interest. There exist atomistic and phenomenological macroscopic methods for heat transport study in semiconductor nanodevices. The atomistic models are more complicated, computationally expensive and simultaneously very accurate. Meanwhile, the macroscopic heat transfer models in support of less computational cost and acceptable but not very precise results, are introduced. The Dual Phase Lag (DPL) model presenting two phase lags, is one of the popular macroscopic schemes. It is obtained that using the DPL model for studying the temperature and heat flux behavior through the nanostructures, results in data which are almost near to that of the atomistic phonon Boltzmann equation (PBE). The present study tries to justify why DPL results are not very accurate and introduces the non-locality as a solution. The studied case is a silicon MOSFET. It is obtained that implementing the non-locality in heat flux is “the missing piece of the puzzle”. While the conventional DPL presents not perfect but almost good results for high Knudsen number systems, including the non-locality makes the results, also for High Kn numbers, very close to that of the PBE data. The newly non-dimensional parameter γ, presenting the strength of the nonlocality, is utilized through the nonlocal DPL modeling. The factor γ is found to have a linear relationship with Knudsen (Kn) number, being 3.5 and 1.5 for Kn=10 and also 0.035 and 0.015 for Kn=0.1, respectively, in one/two dimension. Hence, it is obtained that intruding γ is critical for obtaining accurate temperature and heat flux distributions that are very close to the practical results of the Phonon Boltzmann equation.


لینک حضور آنلاین در سمینار


https://vmeeting2.ipm.ir/b/nan-gkn-wmh-exh

Link: http://qpm.ipm.ac.ir/

سخنران: دکتر علی حاجیلو - پژوهشگاه دانش های بنیادی، پژوهشکده ذرات و شتابگر

6 شهریور 1404
11:00 تا 12:00

تغییرات جفت شدگی برای کرومودینامیک کوانتومی هولوگرافیک با کوارک‌های سنگین و سبک: حالت ایزوتروپیک




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

سخنران: سروش حاصلی

6 شهریور 1404
14:00 تا 15:00

چکیده:

Quantum batteries are an emerging concept at the intersection of quantum physics and energy technology. In this talk, I will present a simple but powerful scheme for a cavity-based quantum battery, where an atom interacts with a cavity under a structured environment. I will show how the presence or absence of environmental memory can dramatically affect the charging process. Remarkably, memory-assisted environments enable the battery to store more energy and deliver more useful work than memory-less ones. Beyond the theoretical results, I will also discuss the physical feasibility of realizing such systems in modern quantum optics laboratories, pointing to a future where quantum-enhanced energy storage may become practical.
Based on : https://advanced.onlinelibrary.wiley.com/doi/abs/10.1002/qute.202400115


لینک حضور آنلاین در سمینار


https://vmeeting2.ipm.ir/b/nan-gkn-wmh-exh

Link: http://qpm.ipm.ac.ir/

سخنران: دکتر محمد صحرایی - پژوهشکده ذرات و شتابگرها

4 شهریور 1404
11:00 تا 12:00

کاربرد شبکه های عصبی عمیق تولیدکننده در تولید رویداد و شبیه سازی پاسخ آشکارساز



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

سخنران: علی رجب پور

30 مرداد 1404
14:00 تا 15:00

چکیده:


This talk explores extreme near-field thermal transport between two parallel plates made of silica (SiO2) and gold, with gap distances ranging from approximately 0.5 nm to 2 nm. While recent experiments have shown that several orders of magnitude can enhance radiative heat flux between planar surfaces at gaps around 10 nm, the regime of sub-10 nm separations remains largely unexplored. Here, non-equilibrium molecular dynamics (NEMD) simulations are employed to investigate heat transfer between silica plates in both amorphous and crystalline forms, as well as between two planar gold surfaces. The simulation results are compared with predictions from fluctuational electrodynamics, showing generally good agreement-particularly for larger gap sizes. By performing a spectral analysis of the heat transfer coefficients across a range of temperatures, we identify the contributions of different transport modes and provide new insights into the mechanisms governing nanoscale energy transfer. These findings offer valuable guidance for future experimental and theoretical studies in extreme near-field heat transfer.


لینک حضور آنلاین در سمینار


https://vmeeting2.ipm.ir/b/nan-gkn-wmh-exh

Link: http://qpm.ipm.ac.ir/

سخنران: دکتر سمیه رضایی - پژوهشگاه دانش های بنیادی، پژوهشکده ذرات و شتابگر

30 مرداد 1404
11:00 تا 12:00

تولید بوزن Z در برخوردهای پروتون-سرب : مطالعه‌ای با استفاده از توابع توزیع وابسته به تکانه عرضی هسته‌ای روش MRW




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

سخنران: H. Abdolmaleki, School of Physics

29 مرداد 1404
14:00 تا 15:00

Date and time

Tuesday, August 19, 2025 (28 Mordad), 2:00 pm (Tehran time)




Link

https://www.skyroom.online/ch/schoolofphysics/highenergyseminar


Abstract
Parton Distribution Functions (PDFs) are key to understanding the momentum and spin distributions of fundamental particles inside the nucleon, and their precise determination is crucial for rigorous tests of the Standard Model and for predicting outcomes in high-energy collider experiments. In this study, we employ Gegenbauer polynomials—a set of orthogonal polynomials with strong convergence properties and superior ability to model the detailed shape of distributions—to parameterize the polarized parton distribution functions (PPDFs). These polynomials are defined by two key parameters, and by fitting experimental data, unknown parameters are extracted that provide deeper insights into the proton’s structure.
By analyzing comprehensive datasets, especially the final JLAB CLAS/EG1b data for proton and deuteron, the essential role of higher twist effects in accurately determining the PPDFs is demonstrated. The polarized structure functions of the proton, neutron, and deuteron are studied at NLO accuracy, both with and without considering higher twist effects. Additionally, the polarized Bjorken sum rule and proton helicity sum rule are examined to validate the fitting results. The findings show strong agreement with existing data and various parameterization models, indicating that this approach effectively decodes the complex structure of the nucleon and opens new horizons in understanding the behavior of fundamental particles at high energies.

Link: https://www.skyroom.online/ch/schoolofphysics/highenergyseminar