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

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

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.

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

23 JUL 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

23 JUL 2025
14:00 - 15:00

The hybrid-structure based on unconventional superconductors provides a rich and suitable platform for engineering topological superconductivity at high temperatures. Previous studies on a hybrid-structure consisting of an iron-based superconductor and a strong spin-orbit coupled semiconductor have demonstrated topological superconductivity while preserving time-reversal symmetry. In this work, considering the key feature of proximity inducing s wave pairing through the iron-based superconductor and Zeeman interaction, we examine the topological phase diagram in the intermediate layer. The investigation of the topological phases of this system reveals the emergence of distinct topological phases characterized by different Chern numbers. Furthermore, the topological index is evaluated using numerical methods in real space, and it is shown that increasing superconducting pairing to the nearest neighbor, expands topological phases for positive Chern numbers while compressing those with negative Chern numbers. In addition, we discuss the modification of topological phase diagram in presence of disorder. These findings paves the way for studying the stability of topological phases in the presence of disorder using real-space topolgical markers.


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

Link: http://qpm.ipm.ac.ir/