Artificial Gauge Fields with Ultracold Atoms in Optical Lattices
(Sprache: Englisch)
This work reports on the generation of artificial magnetic fields with ultracold atoms in optical lattices using laser-assisted tunneling, as well as on the first Chern-number measurement in a non-electronic system.
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This work reports on the generation of artificial magnetic fields with ultracold atoms in optical lattices using laser-assisted tunneling, as well as on the first Chern-number measurement in a non-electronic system.It starts with an introduction to the Hofstadter model, which describes the dynamics of charged particles on a square lattice subjected to strong magnetic fields. This model exhibits energy bands with non-zero topological invariants called Chern numbers, a property that is at the origin of the quantum Hall effect. The main part of the work discusses the realization of analog systems with ultracold neutral atoms using laser-assisted-tunneling techniques both from a theoretical and experimental point of view. Staggered, homogeneous and spin-dependent flux distributions are generated and characterized using two-dimensional optical super-lattice potentials. Additionally their topological properties are studied via the observation of bulk topological currents. The experimental techniques presented here offer a unique setting for studying topologically non-trivial systems with ultracold atoms.
Inhaltsverzeichnis zu „Artificial Gauge Fields with Ultracold Atoms in Optical Lattices “
Introduction.- Square Lattice with Magnetic field.- Artificial Gauge Fields with Laser-Assisted Tunneling.- Overview of the Experimental Setup and Measurement Techniques.- Staggered Magnetic Flux.- Harper-Hofstadter Model and Spin Hall Effect.- All-Optical Setup for Flux Rectification.- Chern-Number Measurement of Hofstadter Bands.- Conclusions and Outlook.Bibliographische Angaben
- Autor: Monika Aidelsburger
- 2015, 1st ed. 2016, XIII, 172 Seiten, 2 farbige Abbildungen, Maße: 16 x 24,1 cm, Gebunden, Englisch
- Verlag: Springer, Berlin
- ISBN-10: 3319258273
- ISBN-13: 9783319258270
- Erscheinungsdatum: 22.12.2015
Sprache:
Englisch
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