21 JAN 2025
11:00 - 12:30

Abstract:

This paper explicitly develops the three-field cosmological perturbation theory with a flat field space. We solve the background and perturbation equations numerically for three different cases. First, to check the consistency of the three-field formalism, we investigate an effective two-field model motivated by the two-block case of the multi-giant vacua matrix Inflation model. Then we investigate a completely three-field case without any direct interaction between different fields, and finally, a three-field case containing direct interactions. The power spectra of the curvature perturbations in all cases are computed numerically, and the effects of rapid turn in the power spectrum are highlighted.

21 JAN 2025
14:00 - 15:00

Date and time

Tuesday, January 21st, 2025 (Bahman 2nd, 1403), 2:00 pm (Tehran zone)




Link

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


Abstract
With the growing precision of cosmological measurements, tensions in the determination of cosmological parameters have arisen that might be the first manifestations of physics going beyond Lambda CDM. We propose a new class of interacting dark sector models, which lead to qualitatively distinct cosmological behavior, dark acoustic oscillation, which can potentially simultaneously address the two most important tensions in cosmological data, the H0 and S8 tensions. The main ingredients in this class of models are self-interacting dark radiation and its dark acoustic oscillation induced by strong interactions with a fraction of dark matter. I will also present the latest results from applying this model across various combinations of cosmological data, illustrating the improvement it provides over Lambda CDM.

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

22 JAN 2025
11:00 - 12:00

Abstract:

In this talk, I will explore the use of Krylov complexity as a diagnostic tool for understanding the chaotic nature of quantum systems. The concept of Krylov complexity is introduced within the framework of the Lanczos algorithm, allowing us to study the system's dynamics in a finite Krylov subspace. By analyzing the time evolution and saturation of complexity, it is possible to demonstrate how it distinguishes between chaotic and integrable many-body systems. These distinctions will be illustrated with numerical results from spin models, providing insights into the interplay between Krylov complexity and quantum chaos.

Indico Link:
https://indico.hep.ipm.ir/e/m.vasli

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

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

22 JAN 2025
14:00 - 15:00

The topic of my presentation is about four different projects that have recently been completed and include three computational packages. The first package was designed for constructing microbial networks, which can model complex interactions among microbial species. In the second project, a package was developed for aligning and comparing two different networks, with applications in areas such as genetic data analysis and comparing biological networks between individuals or environments. The third package was designed for penalized high-dimensional models, enabling the analysis of various biological data and extracting complex patterns. This tool is particularly useful in projects that require examining multiple types of biological data. In the final project, machine learning methods were used to predict diseases based on soil microbiome and environmental data. These projects represent recent advancements in the application of advanced computational methods in the fields of microbiome and life sciences and demonstrate how modern tools can drive scientific research toward new discoveries.

22 JAN 2025
16:00 - 17:00

Thanks to Faltings, Arakelov and Parshin's solution to Mordell's conjecture we know that smooth complex projective curves of genus at least equal to 2 have finite number of rational points. A key input in the proof of this fundamental result is the boundedness of families of smooth projective curves of a fixed genus (greater than 1) over a fixed base scheme. The latter was generalized by the combined spectacular results of Kovacs-Lieblich and Bedulev-Viehweg to higher dimensional analogues of such curves; the so-called canonically polarized projective manifolds. In this talk I will discuss our recent extension of this boundedness result to the case of families of varieties with semiample canonical bundle (for example Calabi-Yaus). This is based on joint work with Kenneth Ascher (UC Irvine).

Subscribing the Mathematics Colloquium mailing list:
https://groups.google.com/g/ipm-math-colloquium
Venue: Niavaran, Lecture Hall 1

27 JAN 2025
15:30 - 16:30

This lecture is an exposition of the work of Dr. Ardavaan-Raad on superluminal radiation and its expected impact in applied physics, engineering and futuristic technological developments. This lecture is dedicated to the memory of Houshang Ardavaan-Raad.

Zoom link:
https://www.zoom.us/join
Meeting ID: 851 5140 7291
Passcode: 362880
Venue: Niavaran, Lecture Hall 1

12 FEB 2025
15:30 - 17:30

This lecture is a continuation of the lecture of about a year ago with the same title. No familiarity with the last lecture will be assumed and the emphasis will be on topics that were not discussed in the previous lecture and have some novelty.
Venue: Niavaran, Lecture Hall 1

19 FEB 2025
-

Winter school on Physics of Complex Fluids (PCF)
School of Physics, IPM
February 19-20, 2025 (Esfand 1-2, 1403)


The Winter School on Complex Fluids aims to enhance the knowledge of postdoctoral researchers and graduate students, particularly at the doctoral level, in the physics of fluids and complex systems. This program provides an in-depth exploration of the physics of complex fluids and hydrodynamic phenomena in soft and dispersed materials, delivering a solid foundation in these fields. The school covers a diverse range of materials with physical and mechanical properties between those of liquids and solids, including macromolecules (e.g., polymers in solution or melt, liquid crystals), suspensions, dispersions (colloids, emulsions, foams, immersed granular materials), dry granular materials, biological fluids, and self-assembling fluids like surfactants. These systems have applications in numerous scientific and industrial fields.

The curriculum combines experimental techniques with theoretical research to uncover fundamental mechanisms governing the dynamics of complex fluids. Participants will also gain practical experience with measurement techniques for dynamic and static parameters and explore simulation methods for modeling natural and industrial systems. Additionally, the school emphasizes applied fluids, addressing critical challenges in energy transition and biological sciences.


The deadline for registration is 3th of February, 2025 (15 Bahman, 1403).

Link: https://physics.ipm.ac.ir/conferences/pcf/

20 FEB 2025
-

Winter school on Physics of Complex Fluids (PCF)
School of Physics, IPM
February 19-20, 2025 (Esfand 1-2, 1403)


The Winter School on Complex Fluids aims to enhance the knowledge of postdoctoral researchers and graduate students, particularly at the doctoral level, in the physics of fluids and complex systems. This program provides an in-depth exploration of the physics of complex fluids and hydrodynamic phenomena in soft and dispersed materials, delivering a solid foundation in these fields. The school covers a diverse range of materials with physical and mechanical properties between those of liquids and solids, including macromolecules (e.g., polymers in solution or melt, liquid crystals), suspensions, dispersions (colloids, emulsions, foams, immersed granular materials), dry granular materials, biological fluids, and self-assembling fluids like surfactants. These systems have applications in numerous scientific and industrial fields.

The curriculum combines experimental techniques with theoretical research to uncover fundamental mechanisms governing the dynamics of complex fluids. Participants will also gain practical experience with measurement techniques for dynamic and static parameters and explore simulation methods for modeling natural and industrial systems. Additionally, the school emphasizes applied fluids, addressing critical challenges in energy transition and biological sciences.







The deadline for registration is 3th of February, 2025 (15 Bahman, 1403).

Link: https://physics.ipm.ac.ir/conferences/pcf/