Search for dissertations about: "Quantum Search"

Showing result 1 - 5 of 34 swedish dissertations containing the words Quantum Search.

  2. 1. Open Quantum Systems : Effects in Interferometry, Quantum Computation, and Adiabatic Evolution

    Author : Johan Åberg; Erik Sjöqvist; Sten Lunell; Vlatko Vedral; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Open Systems; Completely Positive Maps; Channels; Decoherence; Quantum Information; Quantum Computing; Adiabatic Approximation; Quantum Search; Time-Complexity; Fysik; Physics; Fysik;

    Abstract : The effects of open system evolution on single particle interferometry, quantum computation, and the adiabatic approximation are investigated.Single particle interferometry: Three concepts concerning completely positive maps (CPMs) and trace preserving CPMs (channels), named subspace preserving (SP) CPMs, subspace local channels, and gluing of CPMs, are introduced. READ MORE

  4. 2. Quantum technologies for secure communications

    Author : Junior Ricardo Gonzales Ureta; Ana Predojević; Marcus Huber; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum technologies; quantum information; quantum optics; Physics; fysik;

    Abstract : Quantum technologies promise to revolutionize a variety of fields such as metrology, cryptography or computing, among others. The resources that quantum mechanics offers allow us to design faster optimization algorithms, to improve security in communications, and to measure quantities beyond the grasp of current technology. READ MORE

  5. 3. Exploring the Set of Quantum States

    Author : Åsa Ericsson; Ingemar Bengtsson; Christopher Fuchs; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantum mechanics; quantum states; density matrices; quantum information; geometry; Physics; Fysik; Theoretical Physics; teoretisk fysik;

    Abstract : Quantum mechanical properties of finite dimensional quantum systems are used within the field of quantum information. In this thesis the set of states (density matrices) for such systems is studied and described, largely in geometrical terms. READ MORE

  6. 4. Quantum technologies for secure communications

    Author : Junior Ricardo Gonzales Ureta; Ana Predojević; Matthias Kleinmann; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum Optics; Quantum Information; fysik; Physics;

    Abstract : Quantum technologies promise to revolutionize a variety of fields such as metrology, cryptography or computing, among others. The resources that quantum mechanics offers allow us to design faster optimization algorithms, to provide unconditional security in communications and to measure quantities beyond the grasp of current technology. READ MORE

  7. 5. Transport in nanowire-based quantum dot systems: Heating electrons and confining holes

    Author : Sven Dorsch; NanoLund: Centre for Nanoscience; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nanowire; Quantum dot; double quantum dot; Thermoelectric effect; Phonon-assisted transport; GaSb; g-factor; Fysicumarkivet A:2022:Dorsch;

    Abstract : Quantum dots embedded in an electronic circuit allow precise control over the charge transport behaviour of the system: Charge carriers can be individually trapped or precisely shuffled between a series of quantum dots in a strictly sequential manner. This introduces ideal conditions to study fundamental quantum physics and such devices are in the focus of extensive efforts to develop quantum information related applications. READ MORE