Conveners
(DCMMP) W1-7 Condensed Matter Theory I | Théorie de la matière condensée I (DPMCM)
- Tami Pereg-Barnea
The general computation of dynamic properties of materials remains a longstanding, difficult problem within computational physics. Surprisingly, simple models such as the homogeneous electron gas (jellium) play critical roles in application of Density Functional Theory and its time-dependent extensions. Those calculations are impeded by the difficulty of evaluating Feynman diagrams on the...
Experiments in doped transition metal oxides often show suppression in the single-particle density of states at the Fermi level, but disorder-induced zero-bias anomalies in strongly-correlated systems remain poorly understood. Numerical studies of the Anderson-Hubbard model have identified a zero-bias anomaly that is unique to strongly correlated materials, with a width proportional to the...
We consider two approaches when calculating the properties of a ferroelectric system with charged
domain walls. These properties include domain wall width, electronic band structure and occupancy,
and the electronic potential energy. Previously, a single parameter, Q, was argued to determine the
crossover of the electron gas from quantum to quasi-classical. However, to obtain this result,...
The rigid rotor is a classic problem in quantum mechanics, describing the dynamics of a rigid body with its centre of mass held fixed. It can be viewed as the quantum mechanics of a particle moving in SO(3), the space of all rotations in three dimensions. The particle can move along two types of closed loops: trivial loops that can be adiabatically shrunk to a point and non-trivial loops that...
