23 APR 2025
09:00 - 16:00

This workshop will delve into the fundamental principles and recent progress in light-matter interactions, with a special emphasis on quantum coherence and interference. These concepts are essential for understanding quantum optical phenomena, which have far-reaching implications for quantum computing, precision metrology, and advanced photonic technologies. Participants will explore computational and numerical approaches to studying light-matter interactions, gaining insights into theoretical frameworks and practical implementations. A key focus will be on the ways in which coherent optical effects can be precisely controlled through the modulation of coupling fields, enabling novel functionalities in quantum photonic systems.

23 APR 2025
16:00 - 17:00

This lecture is intended as an introduction to some of the metaphysical and epistemological issues that are usually raised in connection with mathematical thought. These issues include, among other things, the nature of abstract objects like numbers and sets, some of the well-known arguments for the existence of such objects as well as the epistemological problems that the existence of those objects incur. There will also be some brief discussions of certain anti-realist approaches to mathematical ontology.

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

23 APR 2025
14:00 - 15:00

‎Let A=[a_₀, a_₁, ..., a_{n-1}] ∈ ℂ^ℓ be a finite complex sequence of length ℓ periodically continued with period ℓ. ‎The periodic autocorrelation function PAF(A,s) of A at lag s is‎ PAF(A, s) =∑ {j=0}^{ℓ-1} a_joverline{a_{j+s}}, s=0,1, ..., ℓ-1. ‎Two sequences‎ ‎A and B of the same length ℓ. ‎form a Legendre pair (A,B) if‎ ‎PAF(A,s)+PAF(B,s)=-2, s=1,2, ?, ⌊n/2⌋. ‎Binary Legendre pairs of length ℓ are pertinent to the construction of Hadamard matrices of order ℓ +2 which can exist only if ℓ is odd‎. ‎It is conjectured that there is a binary Legendre pair of every odd length ℓ which is stronger than the Hadamard-matrix conjecture‎. ‎Several infinite classes of Legendre pairs are known‎. ‎The most prominent constructions are defined via characters of finite fields‎. ‎In particular‎, ‎there are Legendre pairs of length ℓ for every prime ℓ =p and every Mersenne number ℓ =2^s-1‎, ‎respectively‎. ‎The smallest undecided case is ℓ=11. ‎In the first part of the talk we summarize the known results on binary Legendre pairs‎. ‎In the second part we discuss quaternary Legendre pairs of length ℓ‎. ‎In contrast to binary Legendre pairs they can exist for even ℓ as well‎. ‎Very recently‎, ‎the first infinite construction was found by Jedwab and Pender completing our earlier semi-construction‎. ‎We give also constructions of quaternary Legendre pairs of length ℓ for all remaining even ℓ < 42‎. ‎The smallest open case is ℓ =42 and the case ℓ =46 is particularly interesting since the existence of a quaternary Legendre pair of this length would imply the existence of a quaternary Hadamard matrix of order 94. ‎Finally‎, ‎we mention generalizations to k-ary sequences‎.

Zoom room information:
https://us06web.zoom.us/j/84906984159?pwd=BCWaIbXBuku3A5I84zNg9mHFxVZjXD.1
Meeting ID: 849 0698 4159
Passcode: 362880
Venue: Niavaran, Lecture Hall 1

23 APR 2025
17:00 - 18:00

Abstract:

The dark dimension scenario, which is motivated from Swampland principles and predicts a single micron scale extra dimension, suggests a consistent framework for the dark sector of the universe. We consider the implications of this scenario for the QCD axion. We find that in the scenario in which the axion is localized on the standard model brane (which we argue is natural), a combination of theoretical (being bounded by the 5D Planck mass) and observational constraints forces it to have decay constant in a narrow range f~10^9 −10^10 GeV.

Indico Link:
https://indico.hep.ipm.ir/e/n.gendler

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

21 APR 2025
16:00 - 18:00

Is just war theory an appropriate framework for assessing the morality of economic sanctions?

21 APR 2025
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HEPCo@Physics School
School of Physics, IPM
21 April 2025 (1 Ordibehesht 1404)


The aim of HEPCO@ physics school is to introduce the recent research work carried out at the school of theoretical physics of IPM and strengthen the ties with other active researchers working on similar areas in the region. This year, the meeting is completely online and is in English. Everybody is welcome to attend the online talks. Topics include



Neutrino physics

Hadron physics

Dark energy

Mathematical physics

Theoretical High Energy Physics

Black hole physics



The meeting is free from charge and entirely online.
Registration Deadline: 14 April 2025




"HEPCo@physics school" stands for High Energy Physics and Cosmology at physics school.

21 APR 2025
11:00 - 12:00

Abstract:

The study of the Standard Model (SM) from the perspective of quantum information theory has led to a variety of interesting results. Recently, quantum entanglement has been employed to explore new physics in top quark pairs, and this concept has found increasing application in high-energy physics. In this talk, I begin by providing an introduction to quantum information theory, with a focus on entanglement and quantum correlations. I then present the results of a paper that considers the entropic uncertainty relations (EURs) and quantum Fisher information (QFI) to investigate the formation of top-antitop quark pairs at the Large Hadron Collider (LHC). This analysis considers both the combination of light quark-antiquark pairs and gluon-initiated processes. A detailed study of the interplay between quark and gluon channels in top quark pair production is significant, with emphasis on the tightness of EURs and the behavior of the system’s maximal QFI.

Based on:
https://doi.org/10.1103/PhysRevD.110.055025

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

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

18 APR 2025
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۲۹-۲۸ فروردین ۱۴۰۴ (۱۷-۱۸ آوریل ۲۰۲۵)

17 APR 2025
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۲۹-۲۸ فروردین ۱۴۰۴ (۱۷-۱۸ آوریل ۲۰۲۵)

17 APR 2025
14:00 - 16:00

We address Krasner's problem (1956) for Polish ultrametric spaces and provide a (hopefully) satisfactory solution. In particular, we discuss a correspondence between the isometry groups of Polish ultrametric spaces belonging to some natural subclasses and various collections of generalized wreath products proposed in the literature. This is joint work with R. Camerlo and A. Marcone.

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

16 APR 2025
14:00 - 15:00

In this work, we present two machine learning-based approaches for predicting drug-disease and drug-target interactions, with a strong emphasis on the role of meaningful feature selection. While deep learning models have shown great potential in biomedical domains, their complexity often comes at the cost of interpretability a crucial factor in clinical and pharmacological applications. Our research demonstrates that when biologically relevant and informative features are carefully engineered, classical machine learning models can achieve competitive performance while offering greater transparency. By leveraging domain knowledge to extract features such as molecular fingerprints, gene expression profiles, and structural similarities, we were able to construct models that are not only efficient but also interpretable and easier to validate by domain experts. The results highlight that thoughtful feature design can significantly influence model selection, performance, and trustworthiness, paving the way for more responsible and explainable AI solutions in drug discovery and repositioning.

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

16 APR 2025
09:00 - 16:00

Perceptual decision making: A neurobiological introduction - Workshop