Events

Upcoming
30
JUL
2025
SCHOOL OF PARTICLES AND ACCELERATORS
Wednesday Weekly Seminar - Virtual Format
PDFxTMDLib: A High-Performance C++ Library for Collinear and Transverse Momentum Dependent Parton Distribution Functions

SCHOOL OF PARTICLES AND ACCELERATORS

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Wednesday Weekly Seminar - Virtual Format
PDFxTMDLib: A High-Performance C++ Library for Collinear and Transverse Momentum Dependent Parton Distribution Functions

Dr. Ramin Kord Valeshabadi - School of Particles and Accelerators, IPM


30 JUL 2025
11:00 - 12:00

Abstract:

Collinear parton distribution functions (cPDFs) and transverse momentum dependent distributions (TMDs) are essential for calculating cross sections in high-energy physics, particularly within collinear and -factorization frameworks. Currently, there exists two libraries, such as LHAPDF and TMDLib, to obtain these physical objects. However, there are limitations in both libraries, especially for TMDs, such as restricted customization and extensibility. Users are limited to the implementations provided by these libraries and cannot easily support unconventional PDFs. Additionally, no standard TMD library currently supports calculations of QCD coupling and uncertainties, which are crucial for precise phenomenological studies. To address these shortcomings, we introduce PDFxTMDLib, a modern C++ library designed to offer a robust and flexible solution. This library supports both collinear PDFs and TMDs while allowing greater customization. It also opens the way to support higher-order distributions. In this article, we describe the structure of PDFxTMDLib. We also demonstrate its validity and performance by integrating it into the PYTHIA Monte Carlo event generator to compute Drell-Yan cross sections. Additionally, comparisons of PDFs obtained from PDFxTMDLib with those from LHAPDF.and TMDLib confirm the reliability of PDFxTMDLib's results.

Indico Link:
https://indico.hep.ipm.ir/e/RKord

Meeting Place:
Virtual Format

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


Link: https://www.skyroom.online/ch/ipm-particles/weekly-seminar
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6
AUG
2025
SCHOOL OF PARTICLES AND ACCELERATORS
Wednesday Weekly Seminar - Hybrid Format
Higher harmonic RF cavity for the Iranian Light Source Facility‘s storage ring

SCHOOL OF PARTICLES AND ACCELERATORS

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Wednesday Weekly Seminar - Hybrid Format
Higher harmonic RF cavity for the Iranian Light Source Facility‘s storage ring

Dr. Arash Sadeghipanah - School of Particles and Accelerators, IPM


6 AUG 2025
11:00 - 12:00

Abstract:

Higher harmonic cavities are widely used in low-emittance and high-current synchrotron storage rings to increase the stored beam's lifetime and vanish the coupled bunch instabilities. These parameters have an essential effect on the quality of synchrotron radiation and the machine's stability. Higher harmonic cavities of the Iranian light source facility are passive, capacitive-loaded structures designed to operate at 300 MHz. These cavities can operate in the beam current range of 50 to 400 mA. This presentation comprehensively discusses analytical calculations and simulations of beam dynamics, electromagnetic, thermomechanical, and vacuum aspects of the Iranian Light Source Facility's higher harmonic cavities. The engineering drawings are finalized after many technical discussions according to the presented results, and the fabrication process of the higher harmonic cavity has been started accordingly. The low-power RF measurement results of the first developed prototype will be reported in the final section.

Indico Link:
https://indico.hep.ipm.ir/e/Sadeghipanah1

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

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

Link: https://www.skyroom.online/ch/ipm-particles/weekly-seminar
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Past
22
JUL
2025
SCHOOL OF PHYSICS
Weekly Seminar
HEPCo Group
Listening to the Universe with Quantum Ears: Precision Experiments and the Quantum Nature of Gravity

SCHOOL OF PHYSICS

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Weekly Seminar
HEPCo Group
Listening to the Universe with Quantum Ears: Precision Experiments and the Quantum Nature of Gravity

A. Maleki, Sharif University of Technology


22 JUL 2025
11:00 - 12:00

Date and time

Tuesday, July 22nd, 2025 (31 Tir), 11:00 AM (Tehran zone)




Link

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


Abstract


This talk addresses the intersection of physics at the smallest and largest scales, where quantum mechanics meets cosmology. We highlight the relevance of this interplay to foundational problems in both cosmology and high energy physics. Our discussion spans the potential quantum features manifesting at galactic or cosmological scales, as well as the role of quantum interferometry in enabling ultra-sensitive measurements in high-energy experiments. These experimental advances not only push the boundaries of precision measurement (such as the detection of gravitational waves), but also open promising avenues for probing quantum aspects of gravity, one of the most profound unresolved questions in theoretical physics.

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21
JUL
2025
SCHOOL OF PARTICLES AND ACCELERATORS
Journal Club: Experiment & Phenomenology – Hybrid Format
What Is… (Conformal) Anomaly?

SCHOOL OF PARTICLES AND ACCELERATORS

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Journal Club: Experiment & Phenomenology – Hybrid Format
What Is… (Conformal) Anomaly?

Dr. Behrad Taghavi - School of Particles and Accelerators, IPM


21 JUL 2025
11:00 - 12:00

Abstract:

Inspired by the “What is…?” column in the Notices of the AMS, this talk provides an informal, nontechnical overview of the core ideas behind different characterizations of anomalies. In the first part, I will briefly survey several mathematical perspectives on the classification and characterization of anomalies in quantum field theories. The second part of the talk focuses on the specific example of the conformal anomaly in two dimensions, illustrating the general concepts with explicit computations and highlighting connections to 2D induced gravity and the AdS_3/CFT_2 correspondence where appropriate.



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

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

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16
JUL
2025
SCHOOL OF QUANTUM PHYSICS AND MATTER
QPM Weekly Seminar (Hybrid Format)
Entanglement generation and scaling from noisy quenches across a quantum critical point

SCHOOL OF QUANTUM PHYSICS AND MATTER

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QPM Weekly Seminar (Hybrid Format)
Entanglement generation and scaling from noisy quenches across a quantum critical point

Rouhollah Jafari


16 JUL 2025
14:00 - 15:00

We study the impact of noise on the dynamics of entanglement in the transverse-field Ising chain, with the field quenched linearly across one or both of the quantum critical points of the model. Taking concurrence as a measure of entanglement, we find that a quench generates entanglement between nearest- and next-nearest-neighbor spins, with noise reducing the amount of entanglement. Focusing on the next nearest-neighbor concurrence, known to exhibit Kibble-Zurek scaling with the square root of the quench rate in the noiseless case, we find a different result when noise is present: The concurrence now scales logarithmically with the quench rate, with a noise-dependent amplitude. This is also different from the anti-Kibble-Zurek scaling of defect density with quench rate when noise is present, suggesting that noisy entanglement generation is largely independent from the rate of defect formation. Intriguingly, the critical time scale beyond which no entanglement is produced by a noisy quench scales as a power law with the strength of noise, with the same exponent as that which governs the optimal quench time for which defect formation is at a minimum in a standard quantum annealing scheme.

Based on : https://doi.org/10.48550/arXiv.2503.03584


Venue: Room D, 3rd Floor, Farmanieh Building, IPM
Link: https://vmeeting2.ipm.ir/b/nan-gkn-wmh-exh

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16
JUL
2025
SCHOOL OF PARTICLES AND ACCELERATORS
Wednesday Weekly Seminar - Hybrid Format
Cosmic birefringence as a probe of the nature of dark matter

SCHOOL OF PARTICLES AND ACCELERATORS

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Wednesday Weekly Seminar - Hybrid Format
Cosmic birefringence as a probe of the nature of dark matter

Dr. Somayyeh Mahmoudi - School of Particles and Accelerators, IPM


16 JUL 2025
11:00 - 12:00

Abstract:

Understanding the fundamental nature of dark matter remains one of the most profound challenges in modern physics. In this talk, I will present how cosmic birefringence—the rotation of the polarization plane of Cosmic Microwave Background (CMB) photons—can serve as a sensitive probe of dark matter phenomenology. I will focus on theoretical frameworks in which dark matter candidates, such as sterile neutrinos, dipolar dark matter, or axion-like fields, induce parity-violating effects that manifest as measurable birefringence. These signatures offer a unique observational window into the interactions between dark matter and Standard Model particles, providing constraints that are complementary to those from conventional direct and indirect detection methods.

Indico Link:
https://indico.hep.ipm.ir/e/Mahmoudi


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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15
JUL
2025
SCHOOL OF PHYSICS
Weekly Seminar
HEPCo Group
CMB constraints on U (1) Axion warm inflation

SCHOOL OF PHYSICS

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Weekly Seminar
HEPCo Group
CMB constraints on U (1) Axion warm inflation

V. Kamali, McGill University


15 JUL 2025
14:00 - 15:00

Date and time

Tuesday, July 15th, 2025 (24 Tir), 2:00 pm (Tehran zone)




Link

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


Abstract

In this talk, I will explain a model of warm inflation driven by axion-like particles interacting with $U(1)$ gauge fields, with implications for the early universe's thermal evolution. By extending traditional warm inflation models, we introduce a dissipation mechanism through the thermal fluctuations of electromagnetic fields, leading to a non-trivial backreaction on the inflaton's dynamics. Our results are consistent with CMB observations, even for a natural sub-Plankian Axion decay constant $f
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14
JUL
2025
SCHOOL OF PARTICLES AND ACCELERATORS
Journal Club: Experiment & Phenomenology – Hybrid Format
Possibility of hydrodynamic description near non-thermal fixed points

SCHOOL OF PARTICLES AND ACCELERATORS

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Journal Club: Experiment & Phenomenology – Hybrid Format
Possibility of hydrodynamic description near non-thermal fixed points

Dr. Farid Taghinavaz - School of Particles and Accelerators, IPM


14 JUL 2025
11:00 - 12:00

Abstract:

There is a wide variety of fixed points in many-body quantum systems, including thermal and non-thermal fixed points. These fixed points are characterized by specific exponents and scaling relations. Recently, it has been proposed that relativistic hydrodynamic equations can describe the evolution of fluctuations near non-thermal fixed points far from equilibrium. In this talk, we will first review some fundamental concepts of fixed points and their emergence through renormalization group equations. We will then explore the hydrodynamic equations applicable to these cases.

Based on:
https://doi.org/10.48550/arXiv.2504.18754

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

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

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25
JUN
2025
SCHOOL OF PHYSICS
Physics Colloquium
Gamma Ray Bursts and Cosmic Rays

SCHOOL OF PHYSICS

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Physics Colloquium
Gamma Ray Bursts and Cosmic Rays

A. De Rujula, IFT, UAM/CSIC, Madrid & Theory Division of CERN


25 JUN 2025
18:00 - 19:30

Date and time,


6-7:30pm, Wednesday 25 June 2025 (4 Tir 1404)


Venue: Online



Link

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



Abstract


Gamma Ray Bursts (GRBs) and Cosmic Rays (CRs) are easily understandable. Solid observations of quasars and micro-quasars show how these objets emit “Cannonballs” (CBs), though the underlying mechanisms are not theoretically well understood. The assumption that core-collapse supernovae emit CBs plus some trivial relativistic kinematics provide a successful understanding of GRBs and CRs. The self-defined “official experts” on these fields resist the evidence, in an explicitly inquisitorial way.



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16
JUN
2025
SCHOOL OF PHILOSOPHY
Biweekly Seminar
Some Considerations on the Internal Approach to Interpreting Physical Theories

SCHOOL OF PHILOSOPHY

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Biweekly Seminar
Some Considerations on the Internal Approach to Interpreting Physical Theories

Abu Torab Yaghmaei, Shahid Beheshti University


16 JUN 2025
16:00 - 18:00

Some Considerations on the Internal Approach to Interpreting Physical Theories

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15
JUN
2025
SCHOOL OF COGNITIVE SCIENCES
Journal Club

Orbitofrontal cortex control of striatum leads economic decision-making

SCHOOL OF COGNITIVE SCIENCES

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Journal Club

Orbitofrontal cortex control of striatum leads economic decision-making

Elmira Ghasemi


15 JUN 2025
16:00 - 17:30



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12
JUN
2025
SCHOOL OF MATHEMATICS
Mathematical Logic Weekly Seminar
On Zariski Topologies on Automorphism Groups of Homogeneous Structures

SCHOOL OF MATHEMATICS

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Mathematical Logic Weekly Seminar
On Zariski Topologies on Automorphism Groups of Homogeneous Structures

Zaniar Ghadernezhad, University of Buckingham, England


12 JUN 2025
14:00 - 16:00

The automorphism group of a countable first-order structure naturally carries the topology of pointwise convergence. In certain cases, this topology can be used to recover/reconstruct the structure up to bi-interpretability. However, it is not the only group topology of interest. In this talk, we explore various group topologies on automorphism groups - particularly minimal group topologies - with a special emphasis on the Zariski topology. This is joint work with Javier de la Nuez González.

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

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11
JUN
2025
SCHOOL OF PARTICLES AND ACCELERATORS
Wednesday Weekly Seminar - Hybrid Format
Quantum Features of Gravcats

SCHOOL OF PARTICLES AND ACCELERATORS

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Wednesday Weekly Seminar - Hybrid Format
Quantum Features of Gravcats

Dr. Saeed Haddadi - School of Particles and Accelerators, IPM


11 JUN 2025
11:00 - 12:00

Abstract:

In this talk, I will present a series of studies where I explore the quantum properties of gravitational cats (so-called gravcats) modeled by interacting qubits under a variety of physical conditions. My focus is on understanding how gravcats can preserve quantum correlations in the presence of thermal noise, gravitational interactions, and different environmental decoherence mechanisms. I then extend this investigation to more general environments, including classical stochastic, correlated dephasing channels, and power-law noise, as well as weak measurement interventions. These results show that gravcats serve as robust resources for maintaining quantum correlations, particularly in non-Markovian regimes where information backflow can delay decoherence. Altogether, these works contribute new insights into how gravcats can function as reliable carriers of quantum information and highlight the nuanced interplay between gravity, noise, and quantumness in open quantum systems.


Based on:
1. https://journals.aps.org/prd/abstract/10.1103/PhysRevD.111.064077
2. https://www.nature.com/articles/s41598-025-03593-5
3. https://link.springer.com/article/10.1140/epjc/s10052-024-13034-8


Indico Link:
https://indico.hep.ipm.ir/e/S.Haddadi1

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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11
JUN
2025
SCHOOL OF QUANTUM PHYSICS AND MATTER
QPM Weekly Seminar (Hybrid Format)
Spatially coherent optical effects in quantum systems

SCHOOL OF QUANTUM PHYSICS AND MATTER

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QPM Weekly Seminar (Hybrid Format)
Spatially coherent optical effects in quantum systems

Seyyed Hossein Asadpour


11 JUN 2025
14:00 - 15:00

In this presentation, we will study the spatially dependent of the coherent optical phenomena in quantum systems. Here, we will discuss the electromagnetically induced grating via optical composite vortex light in a four-level N-type atomic system. We will show that by controlling the orbital angular momentum of the optical vortex light the diffraction pattern of the Fraunhofer diffraction can be controlled in different regions of the space. Moreover, we will study the spontaneous emission (SE) spectrum of the quantum system in two different quantum systems via optical vortex light. In the first one, we will discuss the spatial pattern of the spontaneous emission spectrum in a four-level atomic system located in free space and in the second one, we will analyze the SE spectrum of a double V-type atomic system located near plasmonic nanostructure.


Venue: Room D, 3rd Floor, Farmanieh Building, IPM
Link: https://vmeeting2.ipm.ir/b/nan-gkn-wmh-exh

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11
JUN
2025
SCHOOL OF MATHEMATICS
Combinatorics and Computing Weekly Seminar
Efficient Dynamic Rank Aggregation

SCHOOL OF MATHEMATICS

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Combinatorics and Computing Weekly Seminar
Efficient Dynamic Rank Aggregation

Hourie Mehrabiun, Sharif University of Technology


11 JUN 2025
14:00 - 15:00

Rank aggregation is a well studied algorithmic problem where, given a set of input preference lists over a set of items, the objective is to compute a single ranking that best summarizes the individual lists. The problem has numerous applications, e.g., in social choice, recommendation systems, and information retrieval. In this talk we tackle this problem in the dynamic setting, and present a practically efficient 2-approximation algorithm with near linear update time for the problem. Based on joint work with Alireza Zarei and Morteza Alimi.

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

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News

Seminar
13th Biennial Seminar on Geometry and Topology
June 23-26, 2025 (POSTPONED!)
Announcement
PhD Admission 1404
Alimohammdi Prize
13th Alimohammadi prize in physics
Registration Deadline Updated!
Seminar
Two day Seminar on
Mathematical Logic and its Applications
May 28-29, 2025
Conference
IPM Biennial Conference on Combinatorics and Computing (IPMCCC2025)
May 20-22, 2025
Mathematics Colloquium
Algebraic Coding in the Era of AI
Amin Shokrollahi, EPFL and Kandou, Switzerland
May 21, 2025
(This series of Mathematics Colloquium will be held a part of the IPMCCC 2025 conference.)
Postdoc Positions at IPM
- School of Astronomy
- School of Cognitive Sciences
- School of Particles and Accelerators
Akhbar 111: Winter 2024
Book of the year award
The translation of "Modern Particle Physics" by researchers from IPM and several universities, wins 42nd Book of the Year Award.
Outstanding Reviewer Recognition
Mojtaba Mohammadi Najafabadi was selected as an outstanding reviewer for Journal of Physics G: Nuclear and Particle Physics in 2024.


Scientific news in the media

Neutrinos, Theory, and Women in Physics
Yasaman Farzan, Simons Associate at ICTP, discusses her life and work
(An interview with ICTP)

 A project to boost study of human brain

 The Culture of Research and Scholarship in Mathematics



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