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.



Link: https://qpm.ipm.ac.ir/conferences/Lightmatter/confhome.jsp

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
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
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

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

29 APR 2025
13:30 - 15:30

Predictions enable top-down pattern separation in macaque face processing hierarchy - Journal Club


Link: https://ipm.ac.ir/images/news/PH2500067.jpg

7 MAY 2025
09:00 - 13:00

This workshop brings together researchers investigating collective phenomena in crystalline materials. It emphasizes the role of these phenomena in understanding structural and phase order while advancing theoretical frameworks and their real-world applications. Designed for graduate students, postdocs, and senior researchers, the event will be in person, with all talks accessible online.

Link: https://qpm.ipm.ac.ir/conferences/CollectivePhenomena/confhome.jsp