Many-Body physics at and out-of equilibrium

Research activity of the group of Andrea Marini, at the Institute of Material Science of the National Research Council, Italy

Many-Body Perturbation Theory and Excited-State Simulations

By in NEWS Tag , , , , , , ,

Modena (Italy), 2025, 19-23 May

This school is designed for researchers interested in advanced computational methods for studying light- matter interactions, crucial for optoelectronic devices, quantum computing, and energy applications.
Participants will receive introductory and advanced lectures on many-body perturbation theory, covering topics such as the GW approximation, Bethe-Salpeter equation, non-linear optics, and recent algorithmic advances for 2D systems and metals.
Hands-on sessions will focus on practical simulations using the YAMBO code within a high-performance computing environment, including GPU-accelerated machines. Additionally, participants will learn Python-based post-processing and data analysis with YamboPy.

YAMBO

QMII course at ICTP-EAIFR

By in NEWS, Seminars Tag , , , , , ,

Kigali (Rwanda), 2025, 7-18 April

The advanced topics course of Quantum Mechanics was held at the ICTP-EAIFR in Kigali.

The 16 students admitted to the course came from UR (University of Rwanda) and from several Kenyan universities. They had previously attended to the QMI course in December 2024 and passed the exams in the first week of April 2025.

Program QMIIDownload

The last day social event

 

 

 

 

 

 

 

 

From semi–classical swings to tad–poles: the Electron–Phononproblem as the devil in the details of Many–Body Theory

By in NEWS, Seminars Tag , , , , , , , ,

Munich (Germany), 2025, 30 January

Electrons and phonons are basic concepts, considered as the most elemental and well defined example of fermions and bosons. So it may appear that their formal properties are clear and well established. In reality, despite books and reviews the theory of electron-phonon interaction (EPI) is still very much debated. The reason is mostly historical. Indeed the state-of-the art theoretical and numerical approach to the EPI has been built on top of two popular methods: model Hamiltonians and Density Functional Perturbation Theory (DFPT).

In the seminar held on Thursday, January 30, 2025 at 1:00 pm, at the Tecnische Universität München (TUM School of Natural Sciences, Department of Chemistry) Dr. Andrea Marini, in particular, demonstrated that it is possible to derive an effective vertex correction function that can be easily defined using simple ingredients and used to amend calculations based on the statically screened approximation.

AMarini_abstract – CopiaDownload