Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Cavity QED"”.
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Cavity QED with superconductors and its application to the Casimir effect
Diese Diplomarbeit untersucht den Casimir-Effekt zwischen normal- und supraleitenden Platten über einen weiten Temperaturbereich, sowie die Casimir-Polder-Wechselwirkung zwischen einem Atom und einer solchen Oberfläche. Hierzu wurden vorwiegend numerische und asymptotische Rechnungen durchgeführt. …
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Contribution to Entanglement Theory, Applications in Atomic Systems and Cavity QED
… in a system of two two-level atoms embedded in a cavity by using perturbation theory and a full master equation approach. We unveil interesting features of blockade and transparency in such cavity QED systems.
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Multiple thresholds and many-atom dynamics in the cavity QED microlaser
This thesis describes a study of a cavity QED microlaser in which many atoms are present simultaneously and atom-cavity interaction is well-defined. The microlaser is found to display multiple thresholds analogous to first-order phase transitions of the cavity field. Hysteresis is observed as a …
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Solid state cavity QED : practical applications of strong coupling of light and matter
… at room temperature. Since the earliest days of cavity QED, there has been a major desire to construct solid state optical devices that operate in the limit where strong light-matter interactions dominate the dynamics. Such devices have been successfully constructed, but their operation is …
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Quantum Trajectory Theory of Open Cavity-QED Systems with a Time Delayed Coherent Optical Feedback
… (QT) theory to derive two models for simulating cavity quantum electrodynamic (cavity-QED) systems with time-delayed coherent feedback. First, an explanation of QT theory is given and the related time discretized waveguide (TDW) model is derived. Next we present a model for feedback using the …
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Many-body cavity QED: The Dicke model, phase transitions, and engineering of multipartite entangled atomic states
… particular laser fields and modes of an optical cavity. These interactions are engineered via cavity-assisted Raman transitions: two-photon transitions where one photon is provided by a laser field and the other is associated to a mode of an optical cavity. Two types of interactions were …
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Modelling and Exploiting the Hyperfine Structure of Alkali Atoms for Generation of Nonclassical Light and Rydberg-Atom-Based Field Sensing
… effective interactions between alkali atoms in cavity quantum electrodynamics (cavity QED) systems, building on previous work in this area. The models are based on Raman transitions between the Zeeman sublevels of hyperfine ground states in an alkali atom. We show that by coupling light to both …
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Quantum state reconstruction and tomography using phase-sensitive light detection
… detection of squeezed light in a high-finesse cavity QED setup with an ensemble of Cesium atoms coupled to the cavity. After quantifying sources of noise, the photodiode efficiency, we perform a series of measurements of low photon number coherent states and compare them against the standard …
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Reservoir engineering for quantum information processing
… reservoir engineering that is applied to optical cavity QED based quantum computing. The usual problem for quantum computing with atomic qubits in cavities is scalability as this requires either the coupling of photons leaking from cavities,using linear optics elements and measurements or …
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Design, Fabrication, and Characterization of a MEMS Based Thermally Actuated Fabry-Pérot Interferometer.
… allow for manipulation and control of atoms in QED research. This thesis describes a MEMS based thermally actuated Fabry-Pérot cavity interferometer that has potential as a displacement sensing mechanism for use in material testers and other devices which require motion feedback. …
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Atomic and molecular ions with photon resonators for quantum information science
… planar trap design with an integrated optical cavity. Proposals for photon number memory with trapped ions are presented, and experimental implementation for single ion cavity QED is explored. In addition, a study of vacuum-induced scattering loss increase is performed for mirror coatings at …
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Fluctuation-mediated interactions of atoms and surfaces on a mesoscopic scale
… play a key role in quantum electrodynamics (QED), as in the Lamb shift. They lead, e.g., to atomic level shifts, dispersion interactions (Van der Waals-Casimir-Polder interactions), and state broadening (Purcell effect) because the field is subject to boundary conditions. Such effects can be …
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Cavity quantum electrodynamics with ensembles of ytterbium-171
… realization of a system applying the tools of cavity quantum electrodynamics to an atomic optical lattice clock. We design and implement a unique experimental cavity structure, with a small radius of curvature mirror on one side and a large mirror on the other side. With this structure, we are …
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An ultraviolet fibre-cavity for strong ion-photon interaction
… of a single trapped ion to a miniature optical cavity operating in the ultraviolet. Our cavity provides a source of single photons at a high rate into a single spatial mode. Using our apparatus, we have demonstrated the highest atom-cavity coupling rate achieved with a single ion by an order of …
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Chip-scale Photonic Devices for Light-matter Interactions and Quantum Information Processing
… and characterization of asymmetric resonate cavity with radiation directionality and air-slot photonic crystal cavity with ultrasmall effective mode volume, 2) Exciton-photon interactions between quantum dots and photonic crystal devices and non-classical photon source from a single quantum …