[INSCRIPTION EXTENSION] International Summer School on Computational Quantum Materials 2024.

Hands-on training and emphasis on a pedagogical approach are distinguishing features of this School.

May 20 (Arrival May 19) to May 31, 2024
Jouvence, Orford, Québec

Deadline for applying: February 21st 2024.

Website: https://www.usherbrooke.ca/ecoles-de-pointe/en/physics/2024-computational-quantum-materials

The organizers:

• André-Marie Tremblay
• Michel Côté
• Antoine Georges
• Gabi Kotliar
• Olivier Parcollet

The power of quantum mechanics as a description of nature has never been clearer. But it remains a formidable challenge to solve the equations that are necessary to understand collective electronic properties of complex solids. Conceptual advances, new algorithms and the power of modern computers have allowed numerical methods to rank amongst new theoretical frameworks that are indispensable for this purpose.

This School will focus on computational tools for both models and ab initio methods that deal with so-called "quantum materials" whose spectacular properties range from high-temperature superconductors to large thermopower materials. These properties are consequences of the non-trivial quantum mechanical nature of electrons and of their interactions.

The merging of methods for models of strongly correlated quantum materials with ab initio methods now allows one to make predictions for materials with d and f electrons that were unimaginable until recently. A good part of the School will be devoted to these.

Extensive hands-on training on freely available codes, ABINIT, TRIQS, and a few others such as COMSCOPE, Wannier90 will be an integral part of the School.

Lectures will be pedagogical, presented in a logical sequence and some review material will make sure students are on the same page.

ROOM AND BOARD (in CAD for 12 days)
(There is a $200 discount for those that register for the 3 credits PhD course)

• Single occupancy with taxes $1 800
• Double occupancy with taxes $1 400
• Multiple occupancy with taxes $1 000

The School will:

• Introduce the background in many-body theory necessary to understand modern computational methods. That includes second quantization, Green functions, functional integrals and functional derivative methods, RPA, GW and TPSC approximations.
• Give an in-depth introduction to the main numerical methods used in the study of quantum materials, so that the student will be able to use them, become familiar with the breakthroughs they allowed and be able to make a critical appraisal of each method's relative strengths and weaknesses.
• Illustrate and contribute to the dramatic cross-fertilization that is occurring between ab initio Density Functional approaches and methods developed in many-body theory for highly correlated quantum materials such as Dynamical Mean-Field Theory (DMFT) and Continuous-Time Quantum Monte Carlo solvers. The steps involved in defining model Hamiltonians from Density Functional approaches will be explained.
• Introduce the students to a few current research problems, such as quantum systems out of equilibrium, diagrammatic quantum Monte Carlo, Variational wave-functions and Neural networks

This School will thus help train the next generation of researchers to use and develop tools that have become crucial to solve important problems that are intractable with standard analytical approaches. They will also be taught a few "good practice" programming techniques that should be helpful to them in a broad range of job opportunities.

About two-thirds of the schooling time will be spent learning numerical methods, but each one will also be abundantly illustrated with applications on topics of current research interest.

Formal presentations will be in the morning and just before a late dinner. There will thus be posters sessions and ample time for discussions in the afternoon.

• ABINIT: Is a package whose main program allows one to find the total energy, charge density and electronic structure of systems made of electrons and nuclei (molecules and periodic solids) within Density Functional Theory (DFT), using pseudopotentials and a planewave or wavelet basis.
• TRIQS: Is an open-source, computational physics library providing a framework for the quick development of applications in the field of many-body quantum physics, and in particular, strongly-correlated electronic systems. It supplies components to develop codes in a modern, concise and efficient way.
• COMSCOPE: Comsuite combines a selection of powerful numerical tools that permit a user to perform first principles calculations for weakly and strongly correlated materials - using extension and simplified versions of dynamical mean-field theory (DMFT) in combination with realistic electronic structure methods.
• Wannier90: Wannier90 is an open-source code (released under GPLv2) for generating maximally-localized Wannier functions and using them to compute advanced electronic properties of materials with high efficiency and accuracy.

STUDENT PARTICIPATION

This is a summer school so students are at the center of this event. There will be two official poster sessions where students can present their work, but posters will be exhibited during the whole school to encourage in-depth discussion. Questions are encouraged, free time and hands-on sessions give ample time for students to interact with Faculty and with each other.

Students should have at least one year of graduate work and be familiar with advanced quantum mechanics and statistical mechanics. A few places will be available to postdocs and Faculty members. Exceptionally, they can request to attend only part of the school. International students need to obtain a visa or to show their admission letter upon entry, depending on their country of origin.

All students can register for this School as a three-credit PhD level course with Université de Sherbrooke (there will be 45 hours of lecture, equivalent to a one-semester course). There are no fees for registration or tuition for the course. There will be a discount on living expenses for those who register for credit.

For more information, please contact: [email protected]