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Colored noise in Open Quantum Systems: Noisy frequency estimation and control methods

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PhDThesis_Haase.pdf (10.87Mb)
Erstveröffentlichung
2019-01-31
DOI
10.18725/OPARU-11697
Dissertation


Authors
Haase, Jan Friedrich
Referee
Huelga, Susana F.
Plenio, Martin B.
Paternostro, Mauro
Faculties
Fakultät für Naturwissenschaften
Institutions
Institut für Theoretische Physik
License
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https://oparu.uni-ulm.de/xmlui/license_v3
Abstract
The dynamics of any quantum device is altered by its interaction with the surrounding environment. This thesis discusses the impact of noise in a scenario of quantum frequency estimation and techniques to control the dynamics between interacting quantum systems, as well as a method to tailor memory effects in the dynamics of an experimentally relevant system. In particular, we exploit a quantum metrology setting where N two level systems are employed as probes to estimate the amplitude of a field which alters their level splitting in a linear fashion. There, we explore the fundamental limits of the estimation precision we can achieve using quantum strategies. Furthermore, we apply newly developed quantum control methods to nitrogen-vacancy centers in diamond. These techniques are focused on the interpretation of frequency spectra, the creation of high fidelity two-qubit gates via specifically designed dynamical decoupling sequences and the control of memory effects in the open quantum system dynamics of the nitrogen-vacancy center.
Date created
2018
EU Project
BIOQ / Diamond Quantum Devices and Biology / EC / FP7 / 319130
DIADEMS / DIAmond Devices Enabled Metrology and Sensing / EC / FP7 / 611143
EQUAM / Emulators of Quantum Frustrated Magnetism / EC / FP7 / 323714
QUCHIP / Quantum Simulation on a Photonic Chip / EC / H2020 / 641039
Subject Headings
Quantenmetrologie [GND]
Quantum systems [LCSH]
Physical measurements [LCSH]
Keywords
Open quantum systems; Quantum metrology; Quantum Non-Markovianity; Nitrogen vacancy center; Dynamical decoupling; Frequency estimation; Quantum sensing
Dewey Decimal Group
DDC 530 / Physics

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Haase, Jan Friedrich (2019): Colored noise in Open Quantum Systems: Noisy frequency estimation and control methods. Open Access Repositorium der Universität Ulm. Dissertation. http://dx.doi.org/10.18725/OPARU-11697

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