On the experimental generation and characterization of entangled states of light [Elektronische Ressource] / James DiGuglielmo

On the Experimental Generation and Characterizationof Entangled States of LightVon der Fakult¨at fu¨r Mathematik und Physikder Gottfried Wilhelm Leibniz Universit¨at Hannoverzur Erlangung des GradesDoktor der Naturwissenschaften– Dr. rer. nat. –genehmigte DissertationvonDipl.-Phys. James DiGuglielmogeboren am 22. April 1982 in Belleville, New JerseyVereinigte Staaten von Amerika2010Referent: Prof. Dr. Roman SchnabelKorreferent: Prof. Dr. Karsten DanzmannTag der Promotion: 15.07.2010iiAbstractShared entanglement combined with local operations and classical communication can beused as the physical resource for a communication channel. It is therefore important todevelop the experimental techniques to prepare various multipartite entangled states andcharacterize their entanglement properties. Additionally, since all experimental results in-volve statistical uncertainty, methods to estimate this uncertainty and propagate it throughfurther calculations is essential for any proof-of-principle experiment.The first set of experimental results to be presented involves the preparation and char-acterization of various classes of bipartite quadrature entanglement. These states are recon-structed by measuring the full 44 covariance matrix and evaluating from it informationtheoretic quantities such as the raw secret key rate, the quantum channel capacity and theteleportation fidelity for coherent states.