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Explicit Exchange Interaction and Decoherence Dynamics in One-Dimensional Quantum Systems

In this thesis, we investigate two aspects of one-dimensional interacting quantum systems. The first one is the effect of explicit antiferromagnetic exchange interactions on the quantum phase transitions of a one-dimensional itinerant electron system. The second one is the decoherence of a qubit...

Deskribapen osoa

Gorde:
Egile nagusia: Huang, Xiaoxuan
Beste egile batzuk: Noack, Reinhard (Prof. Dr.) (Tesi aholkularia)
Formatua: Dissertation
Hizkuntza:ingelesa
Argitaratua: Philipps-Universität Marburg 2011
Gaiak:
Metal-insulator transitions and other electronic transitions
Starke Kopplung
Quantenphasenübergang
Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems
Kohärenz
Density matrix renormalization group
Critical point phenomena
Physik
Lattice fermion models (Hubbard model, etc.)
Decoherence; open systems; quantum statistical methods (see also 03.67.Pp in quantum information; for decoherence in Bose-Einstein condensates, see 03.75.Gg)
Strongly correlated systems
Decoherence
Dekohärenz
Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.)
Lattice theory and statistics (Ising, Potts, etc.) (see also 64.60.Cn Order-disorder transformations and statistical mechanics of model systems and 75.10.Hk Classical spin models)
Dichtematrix
Dichtematrixrenormierungsgruppe
Stark korrelierte Systeme
Quantum phase transitions
Quantum computation
Physics
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Deskribapena
Gaia:In this thesis, we investigate two aspects of one-dimensional interacting quantum systems. The first one is the effect of explicit antiferromagnetic exchange interactions on the quantum phase transitions of a one-dimensional itinerant electron system. The second one is the decoherence of a qubit coupled to a one-dimensional quantum spin system.
Deskribapen fisikoa:161 Seiten
DOI:10.17192/z2011.0113

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