Transport and dynamical properties of electron-phonon coupled systems

Jansen, David

dc.contributor.advisor	Heidrich-Meisner, Fabian Prof. Dr.
dc.contributor.author	Jansen, David
dc.date.accessioned	2023-01-31T14:44:36Z
dc.date.available	2023-02-08T00:50:09Z
dc.date.issued	2023-01-31
dc.identifier.uri	http://resolver.sub.uni-goettingen.de/purl?ediss-11858/14484
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-9675
dc.format.extent	202 Seiten	de
dc.language.iso	eng	de
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/
dc.subject.ddc	530	de
dc.title	Transport and dynamical properties of electron-phonon coupled systems	de
dc.type	cumulativeThesis	de
dc.contributor.referee	Heidrich-Meisner, Fabian Prof. Dr.
dc.date.examination	2022-12-06	de
dc.subject.gok	Physik (PPN621336750)	de
dc.description.abstracteng	In this thesis, I investigate the transport and dynamical properties of electron-phonon coupled systems using numerical methods. I focus on the one-dimensional Holstein model, which incorporates both polaron and charge density wave (CDW) physics, and use matrix-product-state-based algorithms. In the first part, I present work where we combine purification with local basis optimization to study the finite-temperature properties of the model. This gives access to polaron spectral functions, polaron and bipolaron optical conductivity, and the energy-transport coefficient at finite filling. The second part focuses on the Holstein model coupled to two tight-binding leads. There, we investigate how current is transported through the structure and how CDW states break down. In the last part, we analyze the spread of an electron in a lattice and the decay of CDWs. We aim to understand if a full quantum mechanical treatment of the phonons is necessary or if trajectory-based algorithms are applicable.	de
dc.contributor.coReferee	Kehrein, Stefan Prof. Dr.
dc.subject.eng	Theoretical physics	de
dc.subject.eng	Solid-state physics	de
dc.subject.eng	Many-body systems	de
dc.subject.eng	Holstein model	de
dc.subject.eng	Electron-phonon systems	de
dc.subject.eng	Matrix-product states	de
dc.subject.eng	DMRG	de
dc.subject.eng	Polarons	de
dc.subject.eng	Bipolarons	de
dc.subject.eng	Local basis optimization	de
dc.subject.eng	Charge density waves	de
dc.identifier.urn	urn:nbn:de:gbv:7-ediss-14484-4
dc.affiliation.institute	Fakultät für Physik	de
dc.description.embargoed	2023-02-08	de
dc.identifier.ppn	183286748X
dc.notes.confirmationsent	Confirmation sent 2023-01-31T14:45:01	de

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