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We are pleased to announce the 2026 Les Houches Summer School on Quan­tum Theory on All Scales, taking place August 03-28, 2026 in the idyllic location of Les Houches in the French Alps. The school, which is supported by STRUC­TURES, aims to highlight recent significant progress on the mathematical analysis of complex quan­tum systems, and to discuss interesting open questions for the future. Six lectures, along with numerous short courses and talks, will focus on interacting and correlated systems, as well as random systems – with methods drawn from analysis and probability to algebra and topology. 

The main topics of the school will be:

• Topological Quan­tum Matter
• Open Quan­tum Systems
• Integral Representations for Quan­tum Theory and the Renormalization Group
• Quan­tum Physics and Randomness
• Macroscopic Quan­tum Systems: Beyond Mean-Field Descriptions
• Entanglement, Entropy and Spacetime

The last Les Houches school with this focus took place in 2010 under the title Quan­tum theory from small to large scales. It brought together many of the best doctoral students and postdoctoral researchers in the field and from all over the world and gave them a perspective beyond their specific thesis and re­search work. It further led to lasting re­search connections, friendships and a sense of community. Many of those that attended the 2010 school as PhD students and postdoctoral fellows have since been appointed as faculty at major re­search universities.

The summer school is organized by Sven Bachmann (University of British Columbia, Canada), Serena Cenatiempo (Gran Sasso Science Institute, L’Aquila, Italy), Alain Joye (Université Grenoble Alpes, Institut Fourier, France) and Manfred Salmhofer ( STRUC­TURES, Universität Hei­del­berg, Germany).

Les Houches School of Physics is proud to have been welcoming physicists from around the world since 1951. Founded by French physicist Cécile DeWitt-Morette, the school has trained generations of early-career researchers, some of whom have since won Nobel prizes.

Application is open until December 8, 2025.

Further information:

• Summer School 2026: Quan­tum Theory on All Scales
• Les Houches School of Physics