過去のセミナー
- 日時
- 10月10日 (金), 15:00-
- 場所
- 京都大学理学部 5号館 413
- 講演者
- Philipp Werner 氏
- ETH Zurich, スイス
- タイトル
- Diagrammatic Monte Carlo simulation of quantum impurity models
- 備考欄 （アブストラクト等）
Quantum impurity models play an important role as representations of molecular conductors and in the ``dynamical mean field" method, currently one of the most promising tools for studying the physics of fermionic lattice models. Despite their zero-dimensional nature, the numerical simulation of impurity models remains a challenging task. Progress has been achieved with the recent development of diagrammatic Monte Carlo techniques. This simulation approach relies on a diagrammatic expansion of the partition function and the stochastic sampling of collections of diagrams. I will explain the key ideas for the diagrammatic method and illustrate its power and flexibility with dynamical mean field results for single-band and multi-orbital models. I will also discuss the adaptation of the diagrammatic Monte Carlo technique to real-time dynamics in non-equilibirum systems.