Events

Upcoming
27
JAN
2025
SCHOOL OF MATHEMATICS
Lecture
On Superluminal Radiation

SCHOOL OF MATHEMATICS

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Lecture
On Superluminal Radiation

Mehrdad Shahshahani,


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

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12
FEB
2025
SCHOOL OF MATHEMATICS
Geometry and Topology Seminar
On Reciprocity Laws

SCHOOL OF MATHEMATICS

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Geometry and Topology Seminar
On Reciprocity Laws

Mehrdad Shahshahani,


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

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19
FEB
2025
SCHOOL OF PHYSICS
School
Winter school on Physics of Complex Fluids

SCHOOL OF PHYSICS

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School
Winter school on Physics of Complex Fluids

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19 FEB 2025
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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/
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20
FEB
2025
SCHOOL OF PHYSICS
School
Winter school on Physics of Complex Fluids

SCHOOL OF PHYSICS

×
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School
Winter school on Physics of Complex Fluids

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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/
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Past
22
JAN
2025
SCHOOL OF BIOLOGICAL SCIENCES
Weekly Seminar
Advancements in Computational Microbiome Research: From Network Construction to Disease Prediction

SCHOOL OF BIOLOGICAL SCIENCES

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Weekly Seminar
Advancements in Computational Microbiome Research: From Network Construction to Disease Prediction

Rosa Aghdam


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.


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22
JAN
2025
SCHOOL OF MATHEMATICS
Mathematics Colloquium
Boundedness Results in Algebraic Geometry through Moduli and Hodge Theory

SCHOOL OF MATHEMATICS

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Mathematics Colloquium
Boundedness Results in Algebraic Geometry through Moduli and Hodge Theory

Behrouz Taji, The University of New South Wales Sydney


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

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22
JAN
2025
SCHOOL OF PARTICLES AND ACCELERATORS
Wednesday Weekly Seminar - Virtual Format
Krylov Complexity as a Probe for Chaos

SCHOOL OF PARTICLES AND ACCELERATORS

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Wednesday Weekly Seminar - Virtual Format
Krylov Complexity as a Probe for Chaos

Dr. Mohammad Javad Vasli - School of Nano Science, IPM


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

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21
JAN
2025
SCHOOL OF ASTRONOMY
Weekly Seminar
Cosmological Perturbation Theory with Trinity of Scalar Fields

SCHOOL OF ASTRONOMY

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Weekly Seminar
Cosmological Perturbation Theory with Trinity of Scalar Fields

Navid Talebizadeh
(IPM)


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.

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21
JAN
2025
SCHOOL OF PHYSICS
Weekly Seminar
HEPCo Group
Dark Acoustic Oscillation Faces the Cosmological Tension

SCHOOL OF PHYSICS

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Weekly Seminar
HEPCo Group
Dark Acoustic Oscillation Faces the Cosmological Tension

T. Youn, Cornell University, Korea Institute for Advanced Study


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.

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13
JAN
2025
SCHOOL OF PARTICLES AND ACCELERATORS
Journal Club: Experiment & Phenomenology – Virtual Format
In-medium structure of protons and neutrons in Nuclear Matter.

SCHOOL OF PARTICLES AND ACCELERATORS

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Journal Club: Experiment & Phenomenology – Virtual Format
In-medium structure of protons and neutrons in Nuclear Matter.

Dr. Hamed Abdolmaleki - Malayer University


13 JAN 2025
12:00 - 13:00

Abstract:

The atomic nucleus is made of protons and neutrons (nucleons), which are themselves composed of quarks and gluons. Understanding how the quark–gluon structure of a nucleon bound in an atomic nucleus is modified by the surrounding nucleons is an outstanding challenge. Although evidence for such modification—known as the EMC effect—was first observed over 35 years ago, there is still no generally accepted explanation for its cause. Recent observations suggest that the EMC effect is related to close-proximity short-range correlated (SRC) nucleon pairs in nuclei. Here we report simultaneous, high-precision measurements of the EMC effect and SRC abundances. We show that EMC data can be explained by a universal modification of the structure of nucleons in neutron–proton SRC pairs and present a data-driven extraction of the corresponding universal modification function. This implies that in heavier nuclei with many more neutrons than protons, each proton is more likely than each neutron to belong to an SRC pair and hence to have distorted quark structure. This universal modification function will be useful for determining the structure of the free neutron and thereby testing quantum chromodynamics symmetry-breaking mechanisms and may help to discriminate between nuclear physics effects and beyond-the-standard-model effects in neutrino experiments.

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

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9
JAN
2025
SCHOOL OF MATHEMATICS
Mathematical Logic Weekly Seminar
Can You Take Komjath's Inaccessible Away?

SCHOOL OF MATHEMATICS

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Mathematical Logic Weekly Seminar
Can You Take Komjath's Inaccessible Away?

Hossein Lamei Ramandi, Institute for Research in Fundamental Sciences (IPM)


9 JAN 2025
14:00 - 16:00

We aim to compare Kurepa trees and Aronszajn trees. Moreover, we analyze the effect of large cardinal assumptions on this comparison. Using the method of walks on ordinals, we will show it is consistent with ZFC that there is a Kurepa tree and every Kurepa tree contains an Aronszajn subtree, if there is an inaccessible cardinal. This is stronger than a therm due to Komjath where he proves the same consistency from two inaccessible cardinals. Moreover, we prove it is consistent with ZFC that there is a Kurepa tree T such that if U ⊂ T is a Kurepa tree with the inherited order from T, then U has an Aronszajn subtree. This theorem uses no large cardinal assumption. Our last theorem immediately implies the following: If MAω2 holds and ω2 is not a Mahlo cardinal in L then there is a Kurepa tree with the property that every Kurepa subset has an Aronszajn subtree. Our work entails proving a new lemma about Todorcevic's ρ function which might be useful in other contexts. This is a joint work with Stevo Todorcevic.

Zoom room information:
https://us06web.zoom.us/j/81916335336?pwd=5zQT4lutMiBoY5Xp1pkFGtbqiaGozg.1
Meeting ID: 819 1633 5336
Passcode: 559618
Venue: Niavaran, Lecture Hall 1

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8
JAN
2025
SCHOOL OF PARTICLES AND ACCELERATORS
Wednesday Weekly Seminar - Hybrid Format
A novel global charge conservation in the symmetric phase of the early universe

SCHOOL OF PARTICLES AND ACCELERATORS

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Wednesday Weekly Seminar - Hybrid Format
A novel global charge conservation in the symmetric phase of the early universe

Dr. Saeed Abbaslu - School of Physics, Institute for Research in Fundamental Sciences (IPM)


8 JAN 2025
11:00 - 12:00

Abstract:

In the Standard Model at high temperatures, anomalous effects contribute to the violation of baryon number (B) and lepton number (L), separately, while B−L remains conserved. There are also corresponding changes in the helicity of the hypermagnetic field (h) and the Chern-Simons numbers of the non-Abelian gauge fields (NCS,W and NCS,S). In this study, we investigate a baryogenesis process in the symmetric phase of the early Universe by taking into account the Abelian and non-Abelian anomalous effects as well as the perturbative chirality-flip processes of all fermions. We calculate explicitly the time evolution of all relevant physical quantities, including those of h and NCS,W, and show that there is another conserved global charge involving total matter-antimatter asymmetry B+L, hypermagnetic helicity hB and NCS,W.

Indico Link:
https://indico.hep.ipm.ir/e/s.abbaslou

Meeting Place:
Seminar Room, School of Particles and Accelerators, IPM

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

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8
JAN
2025
SCHOOL OF MATHEMATICS
Geometry and Topology Weekly Seminar
Combinatorics Via Hodge Theory

SCHOOL OF MATHEMATICS

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Geometry and Topology Weekly Seminar
Combinatorics Via Hodge Theory

Amir Jafari, Sharif University of Technology


8 JAN 2025
15:30 - 17:00

This will be an expository talk on how algebraic geometry and more specifically Hodge theory have helped to prove some longstanding conjectures in combinatorics and the theory of matroids. These are the results of June Huh, Karim Adiprasito, Eric Katz, Petter Branden, and many more. These results earned June Huh his 2022 Fields Medal.

Online via Zoom:
Meeting ID: 824 7830 2122
Passcode: 362880
Venue: Niavaran, Lecture Hall 1

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8
JAN
2025
SCHOOL OF BIOLOGICAL SCIENCES
Weekly Seminar
Computational Immunology and the Adaptive Immune System: From Exploring Data to New Insights

SCHOOL OF BIOLOGICAL SCIENCES

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Weekly Seminar
Computational Immunology and the Adaptive Immune System: From Exploring Data to New Insights

Nika Abdollahi


8 JAN 2025
14:00 - 15:00

At its core, the adaptive immune system grapples with a profound question: What is self, and what is non-self? This distinction underpins its ability to defend against pathogens while avoiding harm to the body s own tissues. When this delicate balance falters, it manifests in pathologies like autoimmunity, where the immune system attacks the self, or cancer, where altered self-cells evade detection. Computational immunology strives to decode the vast data generated by the immune system, unraveling its complexity through algorithms, models, and visualization. This interdisciplinary effort, spanning biology, AI, mathematics, and medicine, not only tackles technical and analytical challenges but also raises philosophical questions. Can the immune system s adaptability and fluidity truly be reduced to equations? Or does its dynamic nature defy complete comprehension? These explorations bridge data and discovery, offering fresh perspectives on the intricate language of immunity and its profound role in health and disease.


This Seminar is free, hybrid, and open to the public.

You can join with this link:

https://www.skyroom.online/ch/arashfj/talk



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7
JAN
2025
SCHOOL OF ASTRONOMY
Weekly Seminar
Early Universe Evolutions and the Impact of Quantum Loop Corrections

SCHOOL OF ASTRONOMY

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Weekly Seminar
Early Universe Evolutions and the Impact of Quantum Loop Corrections

Haidar Sheikhahmadi
(IPM)


7 JAN 2025
11:00 - 12:30

Abstract:
Using the ultraviolet (UV)-infrared (IR) renormalization technique combined with the in-in formalism, we compute the regularized one-loop corrections, including the tadpole contributions, to the power spectrum arising from cubic and quartic Hamiltonians. Our results demonstrate that the fully regularized and renormalized fractional loop correction to the power spectrum is dominated by the spectrum's peak at the end of the ultra-slow-roll (USR) phase. This correction scales as exp(6 ΔN ) where ΔN denotes the duration of the USR phase. These findings reinforce the conclusion that loop corrections can become non-perturbatively large if the transition from the intermediate USR phase to the final slow-roll (SR) phase is instantaneous and sharp.


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