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Title	Dynamics of qubit chains coupled to non-Markovian reservoirs
Alternative Title	Δυναμική αλυσίδων qubit που συνδέονται με μη Μαρκοβιανές δεξαμενές
Author	Στέργου, Ιωάννης
Thesis advisor	Λαμπρόπουλος, Πέτρος
Abstract	We offer a comprehensive assessment of non-Markovianity (DNM) within an XX chain of interacting qubits linked to a reservoir. Our investigation incorporates di- verse quantum state distance (QSD) measures and considers various non-Markovian spectral densities, including the Lorentzian squared. This approach aims to pro- vide a robust evaluation of DNM. By constructing the density matrix of the open chain without relying on a master equation, we analyze the dynamics of QSD mea- sures between Markovian and non-Markovian damping scenarios. Recognizing that conventional QSD measures often presume trace-preserving density matrices, we adapt them to accommodate damped traces in open systems. Our findings not only demonstrate consistent outcomes across different QSD measures but also reveal in- tricate interactions between qubit-qubit coupling, non-Markovian damping, and en- tanglement dynamics, particularly notable when exploring the implications of the Lorentzian squared spectral density.
Language	English
Issue date	2024-07-11
Collection	School/Department--School of Sciences and Engineering--Department of Physics--Graduate theses
	Type of Work--Graduate theses
Permanent Link	https://elocus.lib.uoc.gr//dlib/c/e/c/metadata-dlib-1718787339-852565-29346.tkl
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