Stochastic integral representation for the dynamics of disordered systems
- authored by
- Ivana Kurečić, Tobias J. Osborne
- Abstract
The dynamics of interacting quantum systems in the presence of disorder is studied and an exact representation for disorder-averaged quantities via Itô stochastic calculus is obtained. The stochastic integral representation affords many advantages, including amenability to analytic approximation, potential applicability to interacting systems, and compatibility with tensor network methods. The integral may be expanded to produce a series of approximations, the first of which already includes all diffusive corrections and, further, is manifestly completely positive. The addition of fluctuations leads to a convergent series of systematic corrections. As examples, expressions for the density of states and spectral form factor for the Anderson model are obtained.
- Organisation(s)
-
Institute of Theoretical Physics
CRC 1227 Designed Quantum States of Matter (DQ-mat)
- External Organisation(s)
-
Max Planck Institute of Quantum Optics (MPQ)
Munich Center for Quantum Science and Technology (MCQST)
- Type
- Article
- Journal
- Physical Review A
- Volume
- 107
- ISSN
- 2469-9926
- Publication date
- 17.04.2023
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electronic version(s)
-
http://arxiv.org/abs/1809.04341v1 (Access:
Open)
https://doi.org/10.1103/PhysRevA.107.042213 (Access: Closed)
