The sign problem, computational complexity, and exotic phases in non-Hermitian systems
- Date
- Jul 30, 2026
- Time
- 11:00 AM - 12:00 PM
- Speaker
- Dr. Stella Schindler
- Affiliation
- LANL - Los Alamos National Laboratory
- Language
- en
- Main Topic
- Materialien
- Host
- Grit Rötzer
- Description
- Non-Hermiticity arises widely in condensed matter, optics, and high energy physics, including systems with gain and loss, finite density, and asymmetric dynamics. Analytic study of these systems is complicated by the relaxation of traditional assumptions for Hermitian systems. Numerical analysis is complicated by a sign problem, a generally NP-hard barrier to Monte Carlo sampling. Fortunately, the subset of non-Hermitian systems with so-called PT-type symmetries is more tractable. We show how to overcome sign problems in large classes of PT-symmetric field theories, providing new insights into the nature and origins of computational complexity. We also show that these systems generally support moat phase behavior. .
- Links
Last modified: Jul 30, 2026, 7:36:14 AM
Location
Leibniz Institut für Festkörper- und Werkstoffforschung Dresden (D2E.27, IFW Dresden)Helmholtzstraße2001069Dresden
- Homepage
- http://www.ifw-dresden.de
Organizer
Leibniz Institut für Festkörper- und Werkstoffforschung DresdenHelmholtzstraße2001069Dresden
- Homepage
- http://www.ifw-dresden.de
Scan this code with your smartphone and get directly this event in your calendar. Increase the image size by clicking on the QR-Code if you have problems to scan it.
Legend
- Biology
- Chemistry
- Civil Eng., Architecture
- Computer Science
- Economics
- Electrical and Computer Eng.
- Environmental Sciences
- for Pupils
- Law
- Linguistics, Literature and Culture
- Materials
- Mathematics
- Mechanical Engineering
- Medicine
- Physics
- Psychology
- Society, Philosophy, Education
- Spin-off/Transfer
- Traffic
- Training
- Welcome