Seminar
Magnetization dynamics and spin waves
Speaker:
Ms. Maryam S. M. Moutan
Master Student, Physics Department
Date: Monday, 11 December 2023
Time: 11:00 a.m.
Location: Bldg. 6/Room 125
Abstract:
Magnetization dynamics and spin waves are investigated using the inertial Landau-Lifshitz-Gilbert equation. LLG equation is the fundamental equation to describe magnetization vector field dynamics in microscale and nanoscale magnetic systems. This equation is highly nonlinear in nature, and for this reason, it is generally solved by using numerical techniques. In this presentation, we will explore the realm of magnetization dynamics, delving into the phenomena of spin waves and magnons. The study investigates their behaviour within the framework of the Landau-Lifshitz-Gilbert equation, elucidating the complex interplay between magnetic moments and external influences to enhance our understanding of fundamental processes governing magnetic materials, with potential implications for applications in spintronics
.Moiré Materials
Speaker:
Mr. Saud Abdullah Al-Abdulal
Undergraduate Student, Physics Department
Date: Monday, 11 December 2023
Time: 11:00 a.m.
Location: Bldg. 6/Room 125
Abstract:
This seminar introduces moiré materials, focusing on twisted bilayer graphene, an important research area in condensed matter physics. We will explore moiré patterns, which emerge when two layers of material are stacked with a misalignment and discuss their significance in materials science. The core of our discussion will concentrate on the unique and emergent properties observed in twisted bilayer graphene. These include its distinctive electronic behavior, the manifestation of correlated insulating states, and superconductivity. The presentation aims to provide a clear and broad understanding of these phenomena, underscoring the potential of moiré materials in driving future technological innovations.
Single photon sources: Theory and Applications
Speaker:
Mr. Faiz Khan
Master Student, Physics Department
Date: Monday, 11 December 2023
Time: 11:00 a.m.
Location: Bldg. 6/Room 125
Abstract:
In this seminar I will be exploring the fascinating physics behind single photon sources, spotlighting various types and their working principles. Methods such as spontaneous parametric down-conversion, semiconductor quantum dots, and color centers in diamonds are examined for insights into generating these quantum particles with precision. Beyond the basics, I showcase the indispensable role of single photon sources in quantum communication, cryptography, and computing. Real-world examples highlight their involvement in securing communication channels through quantum key distribution and cryptography.
My exploration extends to properties of some reliable single photon sources along with the behavior of their second order correlation function. The quality and purity of a single photon source depends upon the value of second order correlation function g^((2)). Additionally, I will touch on the application of single photon sources in quantum sensing and imaging, emphasizing their contribution to unprecedented sensitivity.
This seminar offers a comprehensive journey into the foundations and applications of single photon sources. Participants will gain a nuanced understanding of their pivotal role in shaping quantum technologies, from secure communication to revolutionary computing paradigms and beyond.
All faculty, researchers and students are invited to attend.